Lead with Example

Matthew Vetter English 101 Professor Melanie Bussiere September 25th, 2010 A Conflict Of Interest Stability in a ruler’s morals and ethics are a vital asset to have when ruling a group of people. With similarities shared between the ruler and the common person the ruler will then be able to relate and be more respected amongst the population, as opposed to a ruler who rules with his own self interest at hand.In the piece, The Prince, Niccolo Machiavelli argues the many principles of how a prince should and should not rule. In order to rule successfully he states a prince must possess some of the following characteristics; morality, a strong army, strict rule, common ground with his people and also to be widely respected. Machiavelli laid the ground work for many rulers in the future with his modern view in a time where rulers were primitive and ruled through fear and terror.The Prince and its ideas can even be seen today in our modern day presidents and kings proving that Mach iavelli had compelling ideas and arguments for how leaders can obtain and hold a position of power successfully. Respect, the most important quality a leader should have, is the basis for any relationship whether it is between friends or a ruler and his people. The prince depicted in Machiavelli’s work has no respect for or from the population and this solely is his major flaw.Machiavelli states, â€Å"Spending the wealth of others does not lesson your reputation but adds to it; only spending what is your own is what hurts you†. In order to gain the respect he must forge relationships, sacrifice what is his own and respect the lives of his people. It is seen through his methods of war that he spends the lives of his people frivolously sending them on missions where the fatalities are extremely he high due to the fact he has no care for the population as long as his position is protected from outside enemies .The prince grew up rich, privileged and oblivious to the hard ships faced by the working class. His followers grew up in a completely different lifestyle with responsibilities, battles and hard work the two different lives clash, making it impossible for him to share experiences or believe their personal thoughts and aspirations for the civilization if they conflict with his own. Due to the conflicting ideologies of the Prince and his people he will never be able to lead successfully in theory of Machiavelli.These views can even be seen in modern day, when a president or person of power is involved in scandal or betrayal of his people he is impeached and removed from the position of power and that is exactly what will happen to a Prince who cannot control his people. Along with caring about his fellow man that is ranked below him on the social ladder, a prince according to Machiavelli must show compassion along with being able to control. In the view of Machiavelli, â€Å"it is far safer to be feared than loved if you cannot be both†, a leader must find common ground with his people and show interest without leniency within the rules.With this healthy balance of freedom and strict rule Machiavelli provided a solid background for how a leader or in this case a Prince can keep order. The exampled Prince in the essay found it quite difficult to relate to his less fortunate counterparts causing them to not cooperate with his decisions despite the threat of death to those who oppose so without respect and fear no man can truly rule according to Machiavelli. Earning a leadership role through your actions provides a steady background, and respect from the people who will be following you.Many rulers come up through family and their reign is usually short lived. This is due to their inexperience in battle, leadership roles and how to treat a population. A prince regardless of his prior experience and actions will generally rule from a pedestal with belief he is always correct with preconceived notions that his opinion is always higher than those below him or her they will never take others serious. With this mind set it is impossible for someone to rule effectively because they will not take other opinions or view into consideration until it is too late.This is evident in Machiavelli’s piece when he explains the situation in which the Duke of Milan’s sons came into leadership. The boys came into rule after their father and had no respect for the population or their opinion and were quickly over thrown through the force of an outraged population. Leadership is built behind respect and respect is built behind camaraderie and previous acts in which display the character of a leader. The actions of a prince before coming into rule will define his entire reign of power.It will determine whether it is short lived or the start of a prosperous empire. Machiavelli laid down the frame work for the ideal leader to retain power and keep order. The beliefs of Machiavelli have been seen time after t ime in our current leaders around the globe. Their fallacies are seen exactly as Machiavelli saw them and their good qualities are also seen. Nonetheless, it is impossible to say how to perfectly rule as there will always be those to oppose for their own personal reasons but the essay The Prince, is as close of a depiction of the ideal ruler to date.

Duffys poetry Essay

A critic has writ7ten that â€Å"Duffy’s poetry is primarily concerned with human failings†. To what extent do you feel this is true of ‘The Worlds Wife’? Refer to two or three poems in detail or range more widely through the whole collection. Carol Ann Duffy’s collection of ‘The Worlds Wife’ revolves a lot around the subject of human failings. Duffy’s use of everyday language allows her poems to be interpreted by everyone. In the collection of ‘The Worlds Wife’ she tackles serious issues such as gender, contemporary culture, alienation and social inequality. These themes allow her to writing to appeal to a contemporary audience and delivers key messages. The theme of arrogance is seen in several poems, in Mrs Icarus we see that she finds his arrogance unappealing and that she feels as if men feel they can defy the acts of God â€Å"he’s a total, utter absolute, Grade A pillock. † This is similar to Faust, who sold his sole to the devil in return for twenty-four years of unlimited pleasure, knowledge and power; he boasts â€Å"I spent the night being pleasured by a virtual Helen of Troy. † Dr Faustus’ lack of self control, ignorance and plain arrogance could be assumed to be a failing, although he lived a happy life his inhibitions to be successful he needed the aid of the devil therefore he was doomed from the beginning. Here we can see the obvious links between the two poems and how the two characters egotistical ways led to their failure. One interesting failure Duffy uses is seen in the poem ‘The Devils Wife’, Duffy interestingly splits this poem into six sections which all relate back to different themes, we see the value of a relationships, motherhood and repentance. The poem is written based on the background history of the Moors Murders, with the protagonist Myra Hindley and how she became besotted with sociopath Ian Brady. In the first part of the poem we as the readers see how Duffy, displays Hindley as being the ordinary office worker with a crush â€Å"I scowled and poured and sneered. I gave as good as good as I got till he asked me out† we can see that she was the one who initiated the whole relationship. The story changes â€Å"He entered me. † From this moment she was now his, this could be another failing that men have more control than women and she was just his puppet â€Å"he made me bury a doll. † Duffy uses an interesting metaphor here, she say â€Å"doll† instead of a child as a doll is thought to be a child’s toy and just a possession which they eventually no longer require. It ends with â€Å"I felt like this: Tongue of stone. Two black slates for eyes. Thumped wound of a mouth. Nobody’s Mam. † We can see that she has become so obsessed with him, her life has changed forever. Also we are able to identify another theme of motherhood, people were unable to understand how Hindley was able to commit the most abhorrent, sadistic and unforgivable crimes against children as women are associated with protective mother love. We then see that in the third part of the poem, Duffy uses a sonnet in an untraditional form; instead of it being the ordinary love poem, the lack of punctuation shows Hindley’s state of mind and she’s finally repenting and blaming Brady for all of the murders. The final part of the poem gives different forms of execution and she finally admits she was in fact the Devil’ wife. Although this poem is lengthy, the key themes all relate to the main subject of â€Å"human failings†, love is a key importance in this poem â€Å"He held my heart in his fist and squeezed it dry. † Here we can see that men are dominant in relationships and Brady was in control of Hindley, which could be deemed a failing. Also motherhood is a joyous gift in life and could be one of the most important things in life but Hindley displays apathy towards children and lets Brady control her life â€Å"I flew in my chains†¦where we’d buried the doll. † Finally we see another theme of repentance â€Å"Get me a Bible honestly promise you swear† but by the time she finally realised her mistakes it was too late. Another them used is Power, this could also be assumed as a failing. In Mrs Midas, in which she finds that everything her husband touches turns to gold; soon after she realises the marriage will not work because of her husband’s selfishness. â€Å"I thought of the Field of the Cloth of Gold and of Miss Macready. † Here we can see that her husband valued wealth above everything else, but it wasn’t until he accidently touched his daughter he realised the mistake of his greed that was his failing. In The Kray Sisters, Duffy subverts the original story by using female portrayals instead of men; the poem uses cockney slang which allows us as readers to interact more with the poem and makes it more believable. The Kray Twins ran a protective racket, and were well known ‘West End gangsters’. The poem actually displays the success of the twins and how they were feared among the streets. However interestingly this so-called respect may have given the Kray’s the authority they wanted â€Å"We wanted respect for the way we entered a bar, or handled a car, or shrivelled a hard-on with simply a menacing look† However ultimately this respect led to the demise of the twins and they may have ruled the west end during their time but landed themselves a life-sentence in prison. Was it really worth it? Respect and honour are meant to be earned with dignity not by threatening and violating people; therefore I think that although this poem contains positive connotations it ultimately displays a failing. Duffy’s collection of the Worlds Wife is an interesting selection of poems and it is clear that one of the major themes associated with the collection is Human Failings, although these are not seen clearly and not every persona fails the actions they carry out could be assumed as a failing. The ironical and satirical way Duffy writes displays the dark humour of The Worlds Wife we can see that Duffy tries to impersonate the wives of famous characters both factious and fictions.

Parallel Situations Drawn Between King Lear and Gloucester

In what ways does Shakespeare draw parallel situations between King Lear and Earl of Gloucester, and how are the characters similar in the play (specifically Act 1)? While examining Lear and Gloucester, there are obvious similarities, such as that they are both of an older generation with evident power and authority. Both have children wishing to overthrow them through mendacity and false assurance. These two characters relate in a much more symbolic way that reveals insight into their foolishness and naà ¯ve sense of entitlement.Lear and Gloucester are symbolically blind to the fact that their children wish to acquire their power for selfish purposes. Edmund, Gloucester’s son without a mother, falsifies his commitment to his half-brother, Edward, when he says â€Å"I hope for my brother’s justification, he wrote this but as an essay of my taste of my virtue,† (Act 1 Scene 2) and Goneril, Lear’s daughter, has him believe she genuinely loves him when she s ays â€Å"Sir, I love you more than word can wield the matter,† (Act 1 Scene 1).These instances lead to Lear and Gloucester’s imprudent decisions to act on matters that deserve more substantial evidence. â€Å"Gloucester reacts exactly like Lear, displacing his favor onto an unworthy recipient† (Storozynsky). Neither can see their children for who they truly are, which make it seems as if they the necessities to make rational decisions, hence being â€Å"blind†. When considering the underlying characteristics of Lear and Gloucester, the audience can see two men, who are delusional with power, insecure and illogical. Their uncertainties stem from their children, who they love, but are quick to turn against.Lear turns against Cordelia because she refuses to discuss her love for him and Gloucester, for potentially having a preexisting fear that his children wanted him gone so they could have his power, believes that Edward wants him dead. â€Å"The old men inhabit worlds created by the mind and emotions, but which share some of the features of their actual surroundings: isolation, heights and depths, enclosures and open, empty places,† (Storozynsky). This author compares them to empty places and isolation, which is symbolic of their personality.Neither seems to be relatable to the audience, due to them not having any admirable  traits. Both seem to be shallow characters that lack the confidence that a man of power should carry with him. Lear and Gloucester both use the word â€Å"nothing† frequently in the play and this has a symbolic attachment to it. We see Lear use the phrase â€Å"nothing will come of nothing† (Act 1 Scene 1) while addressing his dissatisfaction with Cordelia. This provides insight into his shallowness because the audience is able to see that Lear expects to be verbally showered with praise. The irony is that Goneril and Regan’s flattering’s lack authenticity and are the true st atements that mean â€Å"nothing.Gloucester’s use of the word comes during his conversation with Edmund. He notices Edmund hiding a letter and says, â€Å"The quality of nothing hath not need to hide itself. † (Act 1 scene 2) Gloucester, like Lear, finds himself gullible to false pretenses. This nothingness they speak of is something that they are displacing onto other people, when in fact, they should be self-assessing themselves for. Their ignorance and assumptive attitudes reflects the reason as to why their personalities are hollow and self-fulfilling. Through Act 1, the audience gets insight into the dramatic irony that is evident in both parallel situations.However, there are four more Acts to King Lear. The newer generations of greedy rulers (Goneril, Regan and Edmund) are expecting to cast out the older generation Lear and Gloucester. Lear, while talking to the fool, realizes that he may have made a mistake by handing down his power to his daughters. He is wor ried about his mental health when he says, â€Å"O, let me not be mad, not mad sweet heaven! † This is a foreshadowing of events to come in the book. Due to the parallel situations that Gloucester and Lear are in, both will continue to spiral down a path of chaos and ignorance. Parallel Situations Drawn Between King Lear and Gloucester In what ways does Shakespeare draw parallel situations between King Lear and Earl of Gloucester, and how are the characters similar in the play (specifically Act 1)?While examining Lear and Gloucester, there are obvious similarities, such as that they are both of an older generation with evident power and authority. Both have children wishing to overthrow them through mendacity and false assurance. These two characters relate in a much more symbolic way that reveals insight into their foolishness and naive sense of entitlement. Lear and Gloucester are symbolically blind to the fact that their children wish to acquire their power for selfish purposes.Edmund, Gloucester’s son without a mother, falsifies his commitment to his half-brother, Edward, when he says â€Å"I hope for my brother’s justification, he wrote this but as an essay of my taste of my virtue,† (Act 1 Scene 2) and Goneril, Lear’s daughter, has him believe she genuinely loves him when she says â€Å"Sir, I love you more than word can wield the matter,† (Act 1 Scene 1). These instances lead to Lear and Gloucester’s imprudent decisions to act on matters that deserve more substantial evidence. â€Å"Gloucester reacts exactly like Lear, displacing his favor onto an unworthy recipient† (Storozynsky).Neither can see their children for who they truly are, which make it seems as if they the necessities to make rational decisions, hence being â€Å"blind†. When considering the underlying characteristics of Lear and Gloucester, the audience can see two men, who are delusional with power, insecure and illogical. Their uncertainties stem from their children, who they love, but are quick to turn against. Lear turns against Cordelia because she refuses to discuss her love for him and Gloucester, for potentially having a preexisting fear that his children wanted him gone so they could have his power, believes that Edward wants him dead.â€Å"The old men inha bit worlds created by the mind and emotions, but which share some of the features of their actual surroundings: isolation, heights and depths, enclosures and open, empty places,† (Storozynsky). This author compares them to empty places and isolation, which is symbolic of their personality. Neither seems to be relatable to the audience, due to them not having any admirable traits. Both seem to be shallow characters that lack the confidence that a man of power should carry with him.Lear and Gloucester both use the word â€Å"nothing† frequently in the play and this has a symbolic attachment to it. We see Lear use the phrase â€Å"nothing will come of nothing† (Act 1 Scene 1) while addressing his dissatisfaction with Cordelia. This provides insight into his shallowness because the audience is able to see that Lear expects to be verbally showered with praise. The irony is that Goneril and Regan’s flattering’s lack authenticity and are the true statement s that mean â€Å"nothing†. Gloucester’s use of the word comes during his conversation with Edmund.He notices Edmund hiding a letter and says, â€Å"The quality of nothing hath not need to hide itself. † (Act 1 scene 2) Gloucester, like Lear, finds himself gullible to false pretenses. This nothingness they speak of is something that they are displacing onto other people, when in fact, they should be self-assessing themselves for. Their ignorance and assumptive attitudes reflects the reason as to why their personalities are hollow and self-fulfilling. Through Act 1, the audience gets insight into the dramatic irony that is evident in both parallel situations.However, there are four more Acts to King Lear. The newer generations of greedy rulers (Goneril, Regan and Edmund) are expecting to cast out the older generation Lear and Gloucester. Lear, while talking to the fool, realizes that he may have made a mistake by handing down his power to his daughters. He is wor ried about his mental health when he says, â€Å"O, let me not be mad, not mad sweet heaven! † This is a foreshadowing of events to come in the book. Due to the parallel situations that Gloucester and Lear are in, both will continue to spiral down a path of chaos and ignorance.

Project and marking Research Paper Example | Topics and Well Written Essays - 2500 words

Project and marking - Research Paper Example It will be crucial to mention that decision making process is one of the major parts of Human Resource Management (HRM) in any organization. As often explained theoretically and witnessed in real life cases, HRM is a multifaceted doctrine, which is responsible for many functions performed within any organization being subjected to proper decision making that can ensure maximum success. Some of those functions commonly include recruitment and selection, training and development and employee motivation among others. The aspect of decision making is often regarded as one of the most frequently executed tasks in every section of the HRM functions. Correspondingly, HR managers have the need to decide for themselves as well as superiors with regard to the development of HRM functions within the organization on a regular basis (Armstrong 3-28). All these aspects together ensure success for the overall business, which again differ from one organization to another in accordance with their ind ustrial structure and business performance needs. THESIS STATEMENT This report will primarily present a detailed comparison on the decision making process of recruitment and selection HRM functions of two separate organizations operating in similar industry sector, i.e. Qatar Airways and US Airways will be considered in this report. Contextually, the report will present a comparison between the recruitment and selection

A Dogs Tale - How to Train a Lonely Master Essay

A Dogs Tale - How to Train a Lonely Master - Essay Example Mon seems really great. He is responsible and hard working. But he does not know how to have a life. He does care to have a happy break from his busy hours. I can even say that staying with him for a week seems lonelier than staying in the pound. He does not care about me. He does not even take care of himself. Yes, he feeds and bathes me. But he does not walk me at the park. He does not go out unless he needs to buy food and the other needs. My master needs me. I suddenly barked and barked while he was working. He turned around and shoo me away. He was definitely annoyed at what I was doing. But then again, I need to get his attention. I need to help him. I continued to bark and he stopped working. He turned away from the table and he went to the kitchen to find food. He fed me but I did not touch the food. He really seemed confused. I think he is trying to understand why I barked and not eat when fed. I moved closer to him. He looked at me and mumbled words I cannot understand. I b arked and then I rolled over. He smiled. I think he understood what I wanted him to do. He grabbed a ball and threw it. I ran, picked the ball and ran back to him. He smiled again. We played for few minutes and then I went to the kitchen to eat. He went back to his work too. I was happy that he understood me and he seemed happy playing with me. Every day, I do this to him and he responds quicker than the first time. When I roll over the floor, he already knew what to do. I am happy he is learning. Every day, Mon cleans his car. Every time he does this, I go with him. When I know he is almost done, I bark again and I move closer to the pail of water. He is trying to figure out what I was trying to do. He tried to give me water but I did not move closer, rather I barked again. He then poured the water on me. I stayed unmoved. He knew that I wanted to take a bath. I was happy he understood me again. One day, while we were playing outside the house I saw a girl walking her dog.

A Critical Review of Competing on capabilities (George Stalk, Philip Essay

A Critical Review of Competing on capabilities (George Stalk, Philip Evans, Lawrence E. Shulman 1992) - Essay Example Considering these aspects, the essay intends to present a review of the article ‘Competing on capabilities’ by ‘George Stalk’, ‘Philip Evans’, & ‘Lawrence E. The essay critically considers the major strengths and weaknesses of the article and further attempts to compare with the theories propounded by other scholars. The article ‘Competing on capabilities’ by ‘George Stalk’, ‘Philip Evans’ & ‘Lawrence E. Shulman’ specifically describes about the role and importance of business competitiveness on strategic decision making capabilities of companies. Throughout the article, multiple references of Wall Mart have been illustrated in order to establish a suitable alignment of this retail giant with the article’s theme (Shin, 2001; Stalk & et. al., 1992). According to the authors, a business process can only be categorized as capacity-based depending on the types of business strategies espoused by it. The facts mentioned within this article also appeared to have a specific amount of focus on the customer-satisfaction attainment factors. According to the authors, higher level of customer satisfaction can be achieved through the provision of superior quality of services and the price affordability of products offered by the companies (Article Myr iad, 2014; Sorescu & et. al., 2011). Throughout the article, specific emphasis has been laid upon the effective mechanism of replenishing the store inventory on a regular basis as a strategic plan towards establishing strong brand positioning within the minds of the customers (Bressler, 2009; Chadwick & et. al., 2007). Notwithstanding, appropriate implementation of business strategies has always been a debatable factor for the multiple reviewers as well as retail giants. This eventually proves the credibility of this article as being appropriately debatable against the wider perception of the effects business strategy

Market Communication - Integrated Marketing Communication Plan Essay

Market Communication - Integrated Marketing Communication Plan - Essay Example The marketing communication includes communication activities like selling, advertising, promotion of products, direct marketing, publicity, sponsorship, exhibition, packaging, merchandising, e-marketing, and similar other measures that can influence the selling of the product or the service to the ultimate consumers as well as retain the customers (Smith & Taylor, 4). In this regard, a communication process involves certain steps in order to prepare the plan communicating the product or service. The current study considers the product, fruit drink, and tries to focus on the preparation of an integrated marketing communications plan using the different steps of the process. The IMC (Integrated Marketing Communication) Planning Process and Its Application on the Product, Fruit Drink: The integrated marketing communication plan consists of six steps that would be discussed considering the product, fruit drink and its marketing. These steps are essential as they create a connection betw een the buyer and the seller stressing on a long term relationship between them. Step 1: Identification of Target Customers: It can be understood that every product might not be required by every individual. This implies that every product has a particular segment of customers. ... Trying to reach out to each and every customer would create wastage in terms of expenditure as well as time on the part of the organization. Thus considering the fruit drink product, it can be understood that although the product would be healthy and needful for consumers of different ages, yet the younger generation might prefer it more particularly as an intake during their breakfast. Depending on such an understanding and thereby conducting a research, the target customers need to be analyzed. This is the first step that an organization coming up with fruit drink product need to accomplish, primarily focusing on what the product has in extra to provide to its customers and who would need the product. Step 2: SWOT Analysis: SWOT analysis referring to the analysis of the strengths, weaknesses, opportunities and threats of a company is essential for an understanding of the status of the company with respect to other competitors in the industry. The determination of the strengths and weaknesses provide with the company’s internal analysis while the opportunities and the threats represent the external situation for the company (Duncan, 166). Considering the fruit drink product, this step can be associated in the integrated marketing communication plan, since when a new company would try to launch the product, the company would require learning about its own strengths and weaknesses such that it becomes capable of competing against the existing competitors. Also, in order to understand the external threats and opportunities, the company needs to learn about the other players that are existent in the same industry as well about the possibilities of the threats that might arise from new entrants. Thus this forms the second step of the marketing

Discuss the Markets Impact on Ethnicity in china Essay

Discuss the Markets Impact on Ethnicity in china - Essay Example inorities seem to enjoy a pretty harmonious relationship with each other and also with Hans, which is more economically prosperous than the other minorities. But sometimes these social and economic inequalities have led to tensions and violence; China is a booming economy with tensions that have resulted from unequal growth opportunities. Riots in Northwestern Xinjiang, dissatisfaction in Uyghurs etc. show that these minorities are feeling left behind, even though the Chinese economy is prospering because increasingly, the economic opportunities are being taken up by the Han locals or other migrants. This paper attempts to bring out the impact of the markets on the ethnicity in China. During the period of 1970s, China was suffering from the problems of stagnation in the economy, disguised unemployment and low productivity in both rural as well as the urban sector. To overcome these problems, the Chinese government had embarked some programs of economic reforms, as a result of which, the last two decades has seen a remarkable change. The real per capita GDP has seen a more than 5 fold increase, with an annual growth of about 9% (Wu & Song, 2010, p. 2), whereas millions and millions of people have been lifted out of absolute poverty. However, these benefits have not been distributed evenly as a result of which inequality has risen rapidly in the last few years. Gini coefficient, a very popular measure of income inequality, shows that in 1978, China’s gini coefficient measure was 0.317 whereas in 2005 it was 0.449 (Wu 2010, p. 2). It is further seen that the eastern provinces that are nearer to the sea have developed more than the interior western provinces. Again, these reforms have resulted in increased gender wage gap as well as increased urban-rural income gap. (Fazio & Huges, 2004) Minority groups were initially classified on the basis of common territories, language, culture, economy etc. However, many a times, the members of these minority groups did not

Organisation Behaviour Essay Example | Topics and Well Written Essays - 2750 words

Organisation Behaviour - Essay Example According to Rahmati and Fard (2012) and Sease (2013), metaphors refer to a form of speaking where one thing would be expressed in the light of another so as to describe the character of the subject. They play an important role in understanding and interpreting organisations. To bring this into perspective in this paper, two metaphors borrowed from Images of Organisation, namely, organisation as an organism and political organisation will be used to describe Apple Inc., as the chosen case organisation. Apple Inc. Apple Inc. is a multinational corporation with its headquarters in Cupertino, California dealing with designing, developing and selling personal computers, computer software and consumer electronics. The American company known for its hardware products such as Mac computers, iPhone smartphones, iPad tablet computers and iPod music players and software such as iTunes media browser and Safari web browser among others was founded by Steven Wozniak and Steven Jobs in 1976 and in corporated in the following year. In the first year of its incorporation, the firm released the first Apple computer, Apple I. Today, Fortune 500 Magazine (2012) documents Apple Inc. as the second largest information technology company globally, after Samsung Electronics, by revenue and has been ranked third largest as a mobile phone maker. In 2008 through 2012, it was documented by Fortune 500 Magazine as the most admired firm in America and globally. Going by market capitalisation, it ranks second among the largest publicly traded corporations globally with its value as of January 2013 estimated at USD 414 billion. Its 2012 annual revenue was USD 156 billion as retrieved from its website (http://www.apple.com/). The Late Steve Jobs has been widely accredited for the success that Apple Inc. enjoys today. Together with Steve Wozniak, Steve Jobs co-founded Apple Computers Inc. in 1976, having both dropped out of college (Mittan, 2010). Following the success of their computers in the market, Steve Jobs and the then president, Michael Scott got entangled in power struggle. Though Scot resigned in 1981, tension continued to escalate causing Jobs to quit the company he had co-founded in 1985. NeXT, the company consequently formed by Jobs was purchased by Apple in 1996 seeing the re-entry of Jobs who later in 1997 became the CEO, steering the firm to greater achievements. In 2011, Tim Cook took up Jobs’ roles after his resignation from being the Chief Executive so as to have ample time to concentrate on his deteriorating health, but died later in the same year. Cook has since steered forward the corporation in its operations. Analysis of Apple using Morgan’s Metaphors Apple as an organism Morgan (2006) uses this organism metaphor of organisations to describe their survival through varied environments. According to Black (2003), this metaphor makes humans to view organisations as living units or organisms which must adapt to the changing environment in order to survive. In this case, Apple Inc. considered as an organism would be pegged on its evolution through varied business environments over time. On its inception in 1976, the firm started as a company dealing purely in computers. With time and due to demand, the company

The political and economic foreign policy developments of the United Research Paper

The political and economic foreign policy developments of the United States in the 19th century from the idea of Manifest Destin - Research Paper Example However, this idea was not shared by everyone including the native Indians and Mexicans who had differing views or opinions. Although there were no clearly defined principles to guide the idea, it received enormous support from the democrats who used it to justify various decisive actions. Through the notion of manifest destiny, the United States was driven by the temptation of world power and political supremacy, which sought to consolidate the position it held.1 The spanish american war was fought in 1898 and lasted only three months, and was triggered by the increased occupation of Cuba by the Spanish government which was strongly opposed by the US government. The war occurred as a result of intervention which was encouraged by other factors such as the Yellow Press which simply refers to the numerous newspaper articles that were printed in red ink and calling for bloodshed. Sensationalism by William Randolph Hearst through the Hearst papers and Joseph Pulitzer played a serious ro le in fuelling the war through propaganda views on either side of the war divide. Stories about atrocities committed by the Spaniards in Cuba enraged the Americans in the USA thus shaping their opinion to support the war. As at 1898, the war was at its peak and was nearly coming to an end; on the 4th of April 1898, the Americans intervened through President McKinley ordering war, mainly to end the devastating effect of the war in Cuba on humanitarian grounds and protect American citizens and interests in the island of Cuba. The intervention was also to protect American and Cuban trade and commerce as well as its strategic rights in that particular hemisphere. Through the Treaty of Paris December 10, 1898 America was able to stamp its foreign policy of expansion and imperialism through the acquisition of Philippines, annexation of Hawaii and the acquisition of Puerto Rico, and this occurred after Spain had surrendered. This expansionist theory resonated well with the American public opinion as it seemed to guarantee freedom to every person in the world and also made Americans proud of their institutions especially the military. In addition, it created avenues for commercial expansion in terms of trade in strategic locations of the world. The acquisition of Panama Canal by the US government was the epitome of imperialism by the government of the United States, and this is because of the economic benefits it offered the American government as well as its strategic importance in terms of geopolitical position. It should be noted that the canal offered the government of USA constant flow of revenue as well as saving the economy in terms of inter-coastal trade and commerce. The canal was however not strategic to the US government military-wise as it could be bombed at any time by adversaries such as Japan and the Soviet Union. The destruction would cause war losses that could only be recovered after a year or so during war time and a massive loss of 17 days in trave l time as occurred during its sabotage during the Battle of Guadalcanal. This forced the US military to maintain a heavy presence of navy at sea just in case the canal was attacked. However, with time, the US government pulled out of the canal due to economic interests, and his was partly due to the invention of railway cars using diesel which made transporting of produce to coastal ports then shipping

Soil mechanics Lab Report Example | Topics and Well Written Essays - 1250 words

Soil mechanics - Lab Report Example n-drained and drained were undertaken on the undisturbed soil samples to determine the shear strength parameters under drained and drained condition for the given soil sample from where the building will be constructed. Basing on the results, it is evident that the bearing capacity of the silt soil was much less as compared to the cohesion less soil ultimate bearing capacity. In this regard, the building codes permit higher bearing pressure for less cohesion soils like sand as compared to that of plastic soil (silt). Tri-axial tests are laboratory testing techniques mostly applied to obtain shear strength parameters for different types of soil under un-drained and drained condition (Alshibli and Sture 2000). Conventional test entails a cylindrical soil sample which is subjected to radial stresses as well as axial displacement or controlled increases in axial stresses. Usually, the cylindrical soil specimen is of 200m height and 100 mm diameter. Preparation of specimen is based on the type of soil. For shear failure, the soil grains usually slide over each other along the failure surface hence there is no crushing of grains. At failure, along the failure surface, the shear stress reaches the shear strength. Basically, soils are known to be frictional materials. The strength is based on the stress applied whereby this stress is controlled by effective stresses and here water pressure is needed (Alshibli and Sture 2000). Also soil strength is based on drainage whereby different strengths can be mea sured for a certain soil that can deform at a given constant volume (un-drained) as well as deform without having pore pressure that is excess (drained). Angle of friction (Ã ¸) and Cohesion (c) are generally not soil constant parameters. They are based on the soil initial state and the loading type (drained or un-drained) (Widulinski et al., 2009). The specimen was enclosed vertically with a thin rubber membrane then later put between two rigid ends in the pressure

Applied Statistics at Grand Canyon University Essay Example for Free

Applied Statistics at Grand Canyon University Essay 1. Which patient scored the highest on the preoperative CVLT Acquisition? What was his or her T score? The 3rd patient scored 63 which is the highest CVLT T-score. 2. Which patient scored the lowest on postoperative CVLT Retrieval? What was this patient’s T score? The 4th patient scored the lowest on the postoperative CVLT Retrieval with a score of 23. 3. Did the patient in Question 2 have more of a memory performance decline than average on the CVLT Retrieval? Provide a rationale for your answer. Yes, because he scored 23 and the average is 38.2. 4. What is the mean ( X) and standard deviation (SD) for preoperative T score for CVLT Acquisition? The mean for preoperative T score for CVLT acquisition is 46.35, and the SD is 5.061, calculated using Excel auto sum function. 5. Is the preoperative Retrieval T score for Patient 5 above or below the mean for the norm of the group? Provide a rationale for your answer. The score for patient 5 on preoperative Retrieval T score (52) is above the mean for the norm of the group (47.36). 6. Assuming that the distribution of the preoperative CVLT Retrieval T scores is normal, the middle 68% of the patients had T scores between what two values? 7. Assuming that the distribution of scores for the postoperative CVLT Retrieval T scores is normal, the middle 68% of the patients had T scores between what two values? 8. The researchers state that it appears that the functional integrity of the left temporal lobe, despite evidence of structural abnormality, plays a considerable role when it comes to memory outcomes following left ATL. Can the findings from this study be generalized to a larger population? Provide a rationale for your answer. No, because, according to our source, the sample size is too small to generalize the results for a larger population. 9. If a patient had a raw score = 30, what would his/her postoperative CVLT Retrieval T score be? Tscore=10X/SD+(50-10Xo/SD) Tscore=10(30)/1.414+(50-10(39.294))/1.414 Tscore=-15.729 10. Did patients demonstrate more postoperative memory declines among CVLT Retrieval T scores than CVLT Acquisition T scores? Provide a rationale for your answer No, the number of declines in both postoperative categories is the same(13).

The Women Of Beowulf

The Women Of Beowulf An epic tale of heroes and monsters, the story of Beowulf is filled with excitement and adventure, However Beowulfs importance goes far beyond that of just an excellent literary piece. It also offers many insights into the world of the seventh-century Anglo-Saxon culture. One of the things that is very prevalent in Beowulf is how women are portrayed and expected to act in this society. Anglo-Saxon women that are peaceful and unassertive are considered to be following their roles in society, by greeting guests and serving mead to the men in the mead hall. One such example of the Anglo-Saxon women following this role is Welthow, the queen of the Danes. Women are also portrayed on the opposite end of the spectrum; a perfect example of this would be Grendels mother. She is a strong and fierce monster whom Beowulf must kill. By reading about these two women in Beowulf, we can understand the different ways women are portrayed in this society. Throughout the story of Beowulf, the author sub tly supports the traditional Anglo-Saxon views of women by praising the actions of Welthow, condemning Grendels mother, and showing the need to stop feminine forces like Wyrd; however, the author also contradicts these views on a few rare occasions by sympathizing with Grendels mother, allowing Welthow to assert herself in support of her family. In the story of Beowulf, Welthow is by far the one that one would think of when they picture a typical Anglo-Saxon women in these times. The instance that best demonstrates this is after they all return to Hrothgar. Then Welthow, Hrothgars gold-ringed queen, greeted the warriors a noble woman who knew what was right, she raised a flowing cup to Hrothgar first, holding it high for the lord of the Danes to drink, wishing him joy in the feast. She thanked god for answering her prayers, for allowing her hands the happy duty of offering mead to the heros. (Raffel 28-29) This passage gives a detailed example of what is expected of women in these times. Even on into later years, Women were still expected and encouraged to serve drinks. The wife grew the grapes, harvested the grapes, made the wine, and sold the wine(Collins 26). Even though she is operating as a typical Anglo-Saxon woman she is still a queen. This is evident in her role from that of a traditional Anglo-Saxon woman to a peace maker when she gives a toast in the meadhall Celebrate his courage, rejoice and be generous while a kingdom sits in your palm, a people and power that death will stealà ¢Ã¢â€š ¬Ã‚ ¦. I know your nephews kindness; I know hell replay in kind the goodness you have shown him. (Raffel 51-52) With everyone gathered for the toast, Hrothulf would have second thoughts about betraying his family and taking the throne. In another similar way, in the poem Les Voeux de Paon, a family is quarreling and with the help of a young woman peacemaker, they put down their disagreements, Elyses, a young woman, goes to each knight asking for them to vow to discharge their obligations to arms(Murphy 6) She continues to gently persuade each of them until they all give in to laying down their weapons. However, on the other end of the spectrum we have Grendels mother. Grendels mother defies the traditional role of an Anglo-Saxon woman by being powerful and aggressive. The main difference between Welthow and Grendels mother is that Welthows influence is much more subtle and nonviolent than that of Grendels mother. Being a monster, Grendels mother possesses great warrior-strength (Raffel 57). Grendels mother attacks Herot. Shed taken Hrothgars closest friend, The man he most loved of all men on earth, The wise old kind, trembled in anger and grief, his dearest friend and adviser dead (Raffel 57). The next morning, Beowulf follows her tracks back to her underwater lair. Beowulf goes into her underwater lair and they fight. However Beowulf did not consider the enormous strength she would have. In order to defeat Grendel, Beowulf grabs one of his arms and rips off; on the other hand, Grendels mother fights with Beowulf and almost defeats him. Beowulf only wins the fight because of divine intervention, The ruler of the world, showed me, hanging shining and beautiful on a wall, a mighty old sword (Raffel 71) When later recounting his battle with Grendels mother, he says she fought with such strength that would surpass any man. Despite Beowulf being the hero and Grendels mother being portrayed as a monster, he creates sympathy for Grendels mother by accepting her motive for vengeance and suggesting a close mother-son bond. When Grendels mother is first introduced, she is depicted as a mother mourning her son and out for vengeance. It shows some reason for her attack instead of just being evil. The author continues to build sympathy for Grendels mother by presenting her as having a clear emotional bond with her son. After her attack on Herot, Grendels mother takes the arm of her slain son. Further evidence of the strong emotional attachment between the two is the fact that Beowulf finds Grendels dead body in his mothers underwater lair. The last we hear of Grendel, he is fleeing from Herot with a mortal wound. One can only assume that Grendels mother was mourning the death of her son and unable to let him go. The continued reinforcement of appropriate female roles by presenting two separate and opposing supernatural forces that strongly influence the plot of Beowulf: a masculine God and a feminine Wyrd, suggesting that feminine forces require suppression. Wyrd is a mysterious force that acts as a fate, bringing the heroes of Beowulf ever closer to agony and death; however, God protects Beowulf and helps him in battle. Wyrd works to bring disorder and doom to Beowulf, just as Grendels mother wages war on Hrothgar and his kingdom. Beowulf is able to kill Grendels mother, ending her influence, however he is unable to do anything about the Wyrd except to look to God for help. The story of Beowulf helps paint a picture of what it must have been like to be an Anglo-Saxon woman in those times. The woman who followed the traditional roles are considered good and those who dont are cast out as monsters. Raffel, Burton. Beowulf. 2nd ed. London: Signet Classic, 2008. Print. Collins, James. French Historical Studies. French Historical Studies. 16.2 Print. Murphy, Michael. English Studies. English Studies. 66.2 105. Print.

Substrate On Rate Respiration In Saccharomyces Cerevisiae

Substrate On Rate Respiration In Saccharomyces Cerevisiae The aim of this investigation is to examine what effects different substrates have on the respiration of yeast. I will investigate this by measuring the amount of carbon dioxide evolved during anaerobic respiration. The volume of CO2 gas will be collected using a gas syringe. BACKGROUND INFORMATION YEAST Saccharomyces cerevisiae, also known as yeast, is a micro organism that uses saprophytic digestion to break down substrates. This is achieved through releasing specific enzymes to break down specific substrates, but if yeast does not contain a certain types of enzyme then it cannot break down its substrate. The more the enzyme of a particular substrate, the faster the rate of breakdown and therefore the more CO2 is produced. This will help me to test how much CO2 each substrate produces. Yeast can also respire aerobically and anerobically depending on the availability of O2. If there is plentiful of O2 then yeast would respire aerobically with sugars, producing H2O and CO2 as waste products. However, if no oxygen is available then the fermentation would occur which converts sugars into CO2 and ethanol. RESPIRATION Respiration is the process by which energy is released energy from glucose in the presence of Oxygen, forming carbon dioxide and water as waste products. Glucose releases energy in a series of reactions that take place inside components of the cell. The stages are briefly explained below: GLYCOLYSIS To get the sugar in a more reactive form it is produced to fructose-1,6-bisphosphate by the addition 2 phosphate molecules. This process is a phosphorylation reaction. The fructose-1,6-bisphosphate is then broken down into 2 molecules of glyceraldehydes-3-phosphate, which comprises of 3C each. The glyceraldehydes-3-phosphate converted into pyruvate via the oxidation process where each GAL3P molecule releases 2 hydrogen ions and 2 electrons. The electrons are then transferred to NAD to produce NADH (reduced NAD) and the energy is used to produce 4ATP from 4ADP and 4Pi. Finally there is a net yield of 2 molecules of ATP, and 2 molecules of pyruvate which is used in the link reaction and 2 molecules of reduced NAD which carries on to the link reaction. LINK REACTION In the link reaction the 2 molecules of pyruvate leave the cytoplasm of the cell and enter the mitochondrial matrix. This is an oxidation reaction where 2 NAD molecules oxidise 2 pyruvate molecules into 2 acid molecules. These 2 molecules of acetic acid then go on to combine with 2 coenzyme-A molecules to form Acetyl Co enzyme A. in the end of this stage 2 molecules of reduced NAD form, 2 molecules of CO2 is lost and most importantly, Acetyl Co enzyme A is formed through the conversion of pyruvate. This is then used in the next stage of respiration. KREBS CYCLE At the start Acetyl Coenzyme A , combines with Citrate Synthase an enzyme as well and a 4 carbon molecule called oxaloacetate, forming Citrate. Then, Citrate goes through the process of oxidative decarboxylation which forms a 5 carbon molecule called oxoglutarate.at this point NADH is produced and CO2 is removed. In the latter stages of the krebs cycle, the oxoglutarate is changed into a 4 carbon oxaloacetate molecule. NADH is made and 1 molecule ATP is also made. The volume of CO2 that is produced in the krebs cycle is important as this is the dependant variable. ELECTRON TRANSPORT CHAIN In this stage all of the NADH and FADH that has been produced in the previous stages is converted into ATP. This takes place in the cristae of the mitochondria. The NADH and FADH electrons move. When the electrons pass from one carrier to another, a series of reduction and oxidation reactions take place which releases energy in the process. This energy is used to pump H+ ions from the matrix into the intermembrane space, thus creating a gradient where the concentration of the H+ ions in the intermembranal space is higher than it s in the matrix. The inner membrane contains enzymes called ATP Synthase and The H+ ions diffuse through these enzymes causing energy to be released which is used to synthesise ATP through phosphorylation. The process is called because the final terminal electron acceptor is oxygen which picks up the electrons from the chain and the H+ ion from the matrix to form H20 as a waste product. This reaction is catalysed by the enzyme Cytochrome Oxidase For every NADH which enters the chain and is oxidised by NADH dehydrogenase, 3 ATP are produced. For each FADH that enters the chain, 2 molecules of ATP are made. ENZYMES Enzymes are proteins that can effectively increase the rate of a reaction by lowering the required energy (activation energy) needed in order for the reaction to occur. Enzymes have a tertiary structure which decides the shape of the active site. The substrate must be specific to the active site because if they were not complementary to each other, then the substrate can no longer bind to the active site, thus the enzyme substrate complex does not form. The performance of enzymes can be affected in several ways some of which I have explained below. TEMPERATURE An increase in temperature will cause an increase in the rate of reaction because both the enzyme particles and substrate particles have gained kinetic energy. This will result in the particles to move faster, thus increasing collision frequency and the numbers of successful collisions as the particles have the required activation energy. If the temperature rises above the optimum temperature then the enzymes can become denatured. This happens because the enzyme molecule vibrates more causing the weak hydrogen bonds (holding the 3D structure of the enzyme together) to break. This eventually leads to the shape of the active site being altered. Consequently, the substrate will not be able to bind with the substrate as the shape of the active site is no longer complementary so the substrate enzyme complex can not form. This is important in my experiment because if the yeast (enzyme) was to become denatured then it would not be able to bind with the substrate (e.g. glucose) and the react ion would not be catalysed, preventing any CO2 from being formed. I must ensure that temperature is kept constant throughout. PH Another factor which can affect enzymes is pH. Enzymes also have an optimum pH which is pH enzymes work best at. Changing the pH can change the tertiary structure due to the number of H+ ion in an acid or the OH- ions in an alkali. These ions disrupt the hydrogen and ionic bonds between -NH2 and -COOH. This will cause the tertiary structure to break down and changing the active site in the process. Once again, the substrate will no longer be able to bind with the active site, hence no substrate enzyme complex will form. I intend to use a buffer solution which will resist any changes in pH. SUBSTRATE CONCENTRATION Increasing substrate concentration increases enzyme activity as they are more molecules to occupy the active site, thus a faster reaction. If more enzyme substrate complex forms then more CO2 will be produced. However this is occurs only for a certain period until all the active sites are saturated with substrates. Therefore an increase in substrate concentration will not result in a increase in the rate of reaction. PLANNING THE DEPENDANT AND INDEPENDENT VARIABLE The dependant variable will be the volume of C02 produced during respiration and the independent variable will be the substrates that I decide to use in the experiment. These are Glucose, Fructose, Maltose, Lactose and Sucrose. NULL HYPOTHESIS The substrates will have no effect on the volume of CO2 produced during the respiration of yeast. HYPOTHESIS As the substrates are changed, the volume of CO2 formed during the respiration of yeast will also change PREDICTION I predict that of all my substrates, maltose will produce the greatest volume of CO2 when added to yeast in a fixed amount of time. Referring to my background knowledge, I know that glucose and fructose monosaccharides which can be directly absorbed by the yeast as no enzymes are required to break them down. This will allow for glycolysis to take place quicker. However I think that glucose will produce CO2 quicker than fructose because glucose is the main food source/ respiratory substrate for yeast, thus there will more glucose carrier proteins present in yeast. If more carriers are present then will enable absorption to occur quicker, hence respiration will happen quicker. So I believe glucose will produce more CO2 than fructose within a given time period. However in terms of volume of C02, I believe maltose will exceed both of these monosaccharides. Maltose is a disaccharide that consists of two glucose molecules held together by a glycosidic bond. Once this bond is broken down by maltase, there will be twice as many glucose molecules available in the same volume of other substrates such as glucose. More sugars can then be provided for respiration, hence more CO2 produced in 45 minutes. One point that must be taken into to account is that maltose cant be used directly, so it could take time before the glucose can be used. In addition, as glucose is a polar molecule it must be transported via facilitated diffusion. This could be a limiting factor if all the carriers become occupied, which would slow down the respiration process as a result. After fructose, I predict sucrose will be the 4th substrate to produce the most CO2. Sucrose is also a disaccharide which consists of a glucose and fructose molecule. This substrate also requires enzymes to break it down and this could be a time consuming process as there is a limited amount of time. Furthermore, there arent as many fructose carrier proteins present in yeast cell membrane compared to glucose. Finally I predict lactose will produce the least amount of CO2 purely because yeast doesnt contain the enzyme lactase to digest lactose. This means that its monomers galactose and glucose cannot be used in respiration, thus no CO2 will be produced as a by-product. APPARATUS The following apparatus will be used when conducting the experiment: Clamp and stand Gas syringe accurate to 0.5cm ³/mol Water bath heated to 400C Dry Yeast Thermometer Boiling tubes Safety goggles Universal indicator Distilled water Buffer solution (slightly acidic) Substrates Electronic weighing balance (2 d.p) Stop watch Rubber bung and rubber tube Pipette (15cm3) funnel Measuring cylinders ( 250cm3) Stirring rod Conical Flask Beakers ( 250cm3, 20cm3) METHOD OF INVESTIGATION Steps Accuracy Reason for method 1. Clean all the apparatus used to contain sugars or yeast using distilled water. Set up water bath at a temperature of 40 °C. N/A Cleaning with distilled water ensures that all the equipment to be used in the experiment is clean and is free from impurities that could possibly interfere with CO2 collection.The water bath will be set to 400C because this is the temperature that I have decided to use in my experiments. 2. Fill up a 1 litre beaker precisely up to the 1litre mark with distilled water. Then add a buffer tablet into the beaker and stir thoroughly with a stirring rod Make sure the distilled water has been filled up exactly to the 1L mark. This is the step on how to produce a buffer solution. A buffer solution is required as it dissolves the yeast and substrate together. Allowing collision of the yeast and the substrate is vital otherwise a reaction would not occur 3. Weigh 30g of dry yeast using an electronic balance and transfer it into a beaker. The scale will be accurate to 2 d.p. to allow consistency. If a solution contains more yeast, then more collisions may be involved between the enzymes and substrate, hence a greater rate of respiration, and more CO2 being produced than there should be. 30g of yeast will provide a stock solution for all 15 experiments, thus each experiment will use 2g of yeast. Excess yeast cells in the solution, will cause a large volume of CO2 production as more respiration will occur so 2g is a suitable amount. Keeping a constant concentration of yeast will ensure that my test is fair because an increase in yeast concentration will increase the amount of cells respiring therefore the volume of CO2 will increase 4. Place 250cm3 of buffer solution into a 300cm3 beaker containing dry yeast. Stir thoroughly Ensure that the volume is read from the bottom of the meniscus level. The volume must be read at eye level I have decided to use a bulk buffer solution because it keeps the concentration of yeast constant. Errors are more likely to occur if I had to weigh 2g of yeast and 15cm3 of buffer solution before each experiment. I have also taken into account of any spillages that may occur so I have ensured that I have prepared more than the required amount. 5. Accurately weigh the amount of substrate needed using the electronic balance and place into a 20cm3 beaker. Then, using a pipette, collect 15cm3 of buffer solution into a measuring cylinder and add it to the substrate beaker. The solution should be stirred and the beaker should then be placed in the water bath. Before using the balance confirm that it has been adjusted to 0. The measuring cylinder will be accurate to 0.1cm3. Again, ensure that the reading is taken from the bottom of the meniscus and at eye level. I must weigh the correct amount of substrate so that the concentration remains constant throughout the experiment (1M) 6. I will Prepare the conical flasks and attach the rubber tubing (connected to the rubber bung) to the gas syringe. I will carefully measure 15cm3 of yeast solution with the aid of a pipette and transfer it into a conical flask. This will then be stirred thoroughly and placed back into the water bath. Pipette is accurate to 0.5cm3. The yeast has to be measured very accurately otherwise this would affect my results. For example if too much yeast is added, then there would be increase in amount of enzymes available and so there would be increase in successful collisions resulting in a faster rate of reaction with more CO2 being produced per unit time. The solution has to be agitated to ensure that the yeast molecules are evenly spread and do not settle to the bottom of the boiling tube so that the chances of collisions increases. The water bath will maintain the temperature of the yeast solution. This will prevent the enzymes from being affected by a change in temperature. 7. Use a thermometer to measure the temperature of both the water bath and yeast solution to ensure they are both 400C. As soon as the substrate is poured into the conical flask containing the yeast, immediately attach the bung onto the flask. This should be followed by timing using the stop watch. The stop watch is accurate to 0.01seconds. I have considered the difficulty faced when applying the rubber bung and starting the stop watch. I must make sure that I start the stop watch as soon as the bung is placed in postion and I intend to keep this the same for my other experiments. A rubber bung and the rubber tube will be attached instantly as respiration can occur immediately. The CO2 produced will be collected in the gas syringe. It is important that does not escape. if this did happen then a smaller volume of CO2 would be collected by the syringe, thus the results obtained would not be precise.The stop clock will need to be started immediately to ensure all the experiments go on for exactly the same amount of time, if one experiment was to go on for longer more CO2 would be produced and thus I would get anomalies in my results. To avoid this, the clock needs to be started as soon as the experiment begins. 8. Take readings after 5 minutes of the co2 collected into the gas syringe with the aid of a stop watch. This step should be repeated until the 45th minute for each experiment. The temperature of the solution must also be taken, which should remain constant at 400C. The readings must be taken straight after each interval. For example, I would take the reading just before the 5th minute interval. The Stop watch is accurate to 0.01seconds. The purpose of this step is to observe how much CO2 each substrate produces as time passes. 9. Using a universal indicator I will measure the PH after testing each substrate. The PH should constant throughout but if not, then it should still be recorded. The beakers, conical flask and measuring cylinders should be rinsed with distilled water after each experiment NA It is important to control PH as it could affect the amount of CO2. I will talk about this in greater detail in controlled variables. Rinsing removes any residue that may have been left over in the equipment CONTROLLED VARIABLES Controlled Variable How I will control it Why I will control it Temperature This variable will be controlled using a water bath which will be set to 40 °C throughout the experiment. The temperature must be controlled because the temperature will affect the rate of respiration of the yeast. If the temperature is changed, for example, too high then this may denature the enzymes used by yeast to digest substrates. pH The purpose of a buffer solution is to resist any changes in pH, therefore I will control the pH by add the yeast and substrate to a buffer solution. When CO2 is released, it would dissociate, forming hydrogen ions and hydrogen carbonate. These will cause the pH to decrease and become more acidic. A decrease in pH would affect enzyme activity as this disrupts the charges (H+ and OH-) on the enzymes. This will result in changes in the ionic and hydrogen bonds holding the enzyme together. The enzyme would denature, thus the substrate will no longer fit and so an enzyme-substrate complex will not form. Concentration of yeast used I will prepare stock solution of yeast (30g) containing 250cm3 of buffer solution. This variable can be controlled by simply keeping the amount of yeast (15cm3) used constant throughout the experiments. A stock solution will automatically eliminate any changes to the concentration of yeast since I will be taking the same amount of yeast from the same solution so it will always remain the same. Maintaining the concentration ensures that the same surface area is exposed by the yeast over which enzymes are released for extra cellular digestion to take place. Concentration of the substrate 15cm3 of a 1M substrate solution will be used constantly. If more substrate is added then more C02 would be produced. This is because there is more substrate available for the yeast to digest for respiration, hence producing larger volumes of C02 than it should. If this variable is not controlled then it I would not be able to determine if an increase in CO2 is due to the type of substrate increase in concentration. Timing I will time the experiment using a stop watch in all of my experiments. I will constantly time the experiment for a total of 45 minutes, ensuring that the reading is taken immediately after each 5 minute interval. I have to control this factor because if the yeast is left in the substrate for a longer time period for one experiment then this will allow more respiration to occur. The yeast will digest the substrate to produce more CO2 so therefore all solutions must be left to respire for exactly the same amount of time in order to obtain reliable results. Culture of yeast Use the same brand of yeast in all experiments. Different types of yeast may cause different results as the number of carrier proteins may vary for a particular substrate. Using the same yeast will ensure that the size of the yeast in each experiment remains the same. CALCULATING SUBSTRATE CONCENTRATION In order to keep the substrate concentration the same I will have to calculate the mass of each of my substrates. Firstly, I will use the following equation: Moles = Molarity x Volume 1000 The substrate concentration I will be using will be 0.5M and the volume will be 25cm3. In order to determine the mass from the number of moles I shall then use: Mass = Moles x Mr CALCULATIONS FOR GLUCOSE AND FRUCTOSE 1000 0.5 X 25 = 0.0125mol Fructose and Glucose has the same Mr of 180 0.0125 X 180 = 2.25g I need add 2.25 of each substrate into 25cm3 of buffer solution. I will produce a stock solution which will help maintain the concentration of the substrates throughout. I will be carrying out 2 experiments for Glucose or Fructose so I will need 4.5g of each (2 X 2.25 = 4.5g). CALCULATION FOR MALTOSE, SUCROSE AND LACTOSE 10000.5 X 25 = 0.0125mol Maltose, Sucrose and Lactose have the same Mr of 342 Maltose, Sucrose and Lactose are isomers consisting of two monosaccharides linked together by a glycosidic bond. I have taken into account that when a condensation recaction occurs to form this disaccharide then a water molecule is removed so I must substract the Mr of a water molecule from the Mr of the disaccharide. 360-18= 342 0.0125 X 342 = 4.28g So I will add 4.28g of Maltose, Sucrose and Lactose with 25cm3 of buffer solution. I will also produce a stock solution which will allow me to carry out the required amount of experiments. Therefore, I need to measure 8.56g (2 X 4.28g = 8.56g) of each substrate which will then be dissolved into buffer solution. CONTROLLED EXPERIMENTS I have decided to carry out 6 controlled experiments for each of the 5 substrate in conjunction with the normal experiments. I will conduct these experiments in order to demonstrate and prove that the process of respiration cannot occur without the presence of the respiratory substrate as well as the yeast. The first experiment will involving a boiling tube containing only the 25cm3 of yeast solution. After placing the boiling tube in the water bath (400C), I will then record how much CO2 is produced. This would be conducted in the same way as my method where I would take readings after every 5 minutes until the 45th minute has been reached. The other 5 control experiments will only consist of the substrates. I will measure 15cm3 of each substrate into separate boiling tubes. These will also be placed in a water bath and the volume of CO2 produced will be recorded at every 5 minute intervals for 45 minutes. No CO2 being produced will confirm that the yeast cannot produce CO2 with the presence of a substrate and a substrate cannot respire on its own. DATA ANALYSIS Below is an exemplar table which will be used to analyse the results produced in the experiment This table will help me to calculate the average of the CO2 produced in each of the experiments after every 5 minutes. I will produce line graphs using the averages of CO2, which will enable me to compare the averages of the different substrates. From this, I can determine if digestion for polysaccharides and disaccharides effects how much CO2 is produced. This is how I will present the average of CO2 production for each substrate: Graph showing the volume of CO2 produced against the time taken Average CO2 Production (cm3) Time (mins) A t- test is a statistical test that takes a look the amount of data, if there is a difference between the means of two sets of data and also the spread of the data. A t-test is relevant as I will be using a large sample of results which will consist of results from other members in m class and including mine. The formula for the t-test is: I have decided to construct a histogram for each substrate as this will allow me to compare my data easily after plotting frequency against experiments. A histogram will show if there any significant overlap between two substrates. Consequently, this can help me to make a decision of whether or not a t-test must be carried out. The below histogram would require a t-test: Glucose Maltose MODIFICATIONS I will use an inverted burette for measuring the volume of CO2 produced instead of a gas syringe. When carrying out my preliminary experiments I found that the gas syringe didnt move smoothly, therefore i was unable to accurately read how much CO2 was being produced. Therefore I will use an inverted burette which has an inaccuracy of 0.1cm3 Unfortunately, no buffer solution is available to control the pH of solution. In order to confirm that the pH hasnt changed, I will measure the pH at the start and end of each experiment. This will achieved using a universal indicator. I have changed the point at which I will take the reading. Initially I chose to take a reading jus before swirling the flask but I have now realised that this is incorrect. It would be wrong to do it this way because I want all the CO2 to escape from the flask before each reading is taken. So I will now take reading after swirling the conical flask.

Womens Rights :: essays research papers

Worcester is an amazing city with much historical importance and recognition. Many residents often do not realize the significance of this great city. Most individuals familiar with Worcester have heard about the smiley face, the first valentines, and the birth control pill all coming from Worcester, but these items tend to go to the back of one’s mind after time. What many do not realize is that the First Woman’s National Rights Convention was held right here in Worcester as well.   Ã‚  Ã‚  Ã‚  Ã‚  This historical event took place at Brinley Hall on Main Street, In Worcester, Massachusetts, in October 1850, after being arranged by such prominent anti-slavery activists as Abby Kelley Foster and Lucy Stone. The convention drew a crowd of one thousand people, consisting of both whites and blacks, and most surprisingly to many, both men and women.   Ã‚  Ã‚  Ã‚  Ã‚   Speakers such as, Abby Price, Paulina Wright Davis, and Lucretia Mott spoke out at this event with extreme effectiveness towards advancements for the woman’s rights movements. â€Å"†¦ no one could listen to them without respect for the talent of the speakers, whatever they might think of the merits of the cause,† reported the Massachusetts Spy newspaper. Although there was a similar convention held two years earlier in Seneca Falls, New York, it had attracted little attention. It was not until the First National Woman’s Rights Convention was held in Worcester that advancements to proposed resolutions were starting to spring about, due to its national recognition.   Ã‚  Ã‚  Ã‚  Ã‚  In my opinion, one of the most relevant resolutions brought up during this convention was that of women suffrage. Not only were speakers calling for women suffrage, but also for the suffrage and rights for African Americans as well. You can see this hope for the future from the quote of one of the resolves stating, â€Å"Equality before the law, without distinction of sex or color.† While many people might not have agreed with that statement back during this time, this convention proved of the intelligence and the universal respect for everyone that a lot of people exhibited at Brinley Hall. It went to show that not everyone was racially prejudice. Because there were men there also supporting the memorable event, it also showed that they knew in their wisdom that women were equal with men and were plenty capable to make decisions for the United States, by voting in the wonderful system of democracy. These men were strong and courageous for supporting such a radical idea, at that time, as the equality of sexes.

Financial Analysis of Oracle Corp Essay -- essays papers

Financial Analysis of Oracle Corp INTRODUCTION Background and History Oracle Corporation is a technology company that supplies software for the use of information management. They develop, manufacture, market and distribute computer software that helps other corporations manage their data so they can better grow and prosper. In 1977, Larry Ellison, Bob Miner, and Ed Oates founded System Development Laboratories. After being inspired by a research paper written in 1970 by an IBM researcher titled â€Å"A Relational Model of Data for Large Shared Data Banks† they decided to build a new type of database called a relational database system. The original project on the relational database system was for the government (Central Intelligence Agency) and was dubbed ‘Oracle.’ They thought this would be appropriate because the meaning of Oracle is source of wisdom. In 1978, Software Development laboratories moved from their offices in Santa Clara to ones in Menlo Park, the heart of the Silicon Valley. To better explain what they did, they changed their name to Relational Software Inc., or RSI. In 1979, RSI developed and distributed its first commercial SQL database V2, there was no version 1. In 1982, RSI changed its name to Oracle Systems Corporation, which later changed again to Oracle Corporation. They reasoning behind this was that they thought by naming the company after the product it would help the company obtain more recognition. In 1983, Oracle decided to make the Relational Database Management System (RDBMS) portable. They then introduce V3, the first portable database to run on Personal Computers, minicomputers and mainframes. In 1984, Oracle Corporation’s revenues reach $12.7 million and they move into a new eighty-four thousand square foot building in Belmont, CA. They also went international by working with companies in Canada, Netherlands, and a limited portion in the United Kingdom. In 1985 they hit $23 million in revenues and expanded to Austria, Germany, Japan, Sweden, and Switzerland. Their Initial Public Offering was on March 12, 1986, the same year their revenues reached $55 million. The stock opened at a price of $15 and closed at $20.75. Oracle Corporation expanded to Australia, Finland, France, Hong Kong (limited), Norway, and Spain. In 1987, Oracle’s revenues were $131 million, as ... ...rs, setting a good trend for the corporation. They also have a very low debt-to-equity ratio, indicating that they have enough equity to easily pay off any funds acquired from creditors. As a creditor I would feel safe in lending them funds for any future projects or endeavors. Bibliography: WORKS CITED Oracle Corporation 2000a. Investor Relation – Corporate History. 20 July. Internet: http://www.oracle.com/corporate/. Oracle Corporation 2000b. Investor Relations – Financials. 21 July. Internet: http://ww.oracle.com/corporate/. Oracle Corporation 2000c. 1999 Annual Report – Introduction. 21 July. Internet: http://www.oracle.com/corporate/annual_report/99/index.html. Oracle Corporation 2000d. Financial Highlights. 22 July. Internet: http://www.oracle.com/corporate/annual_report/99/financial/index.html?finhgh99.html. Moyer, Charles R., and McGuigan, James R., and Kretlow, William J. 1998. Contemporary Financial Management. South-Western College Publishing: Cincinnati, Ohio, 64-106. America Online, Inc. 2000. Personal Finance – Investment Research. 30 July. http://research.web.aol.com/index.adp?T1=orcl&item=4.

Power and Influence in the Workplace Essay

This case study is based upon the conceptual article by Glenys M. Drew titled; ‘Enabling or Real power and influence in leadership’, in which â€Å"aims to provoke thought about power and influence in leadership.† Simply stated, power is our desire to have influence upon others, placing us within a particular social status. According to Lewicki, Barry, and Saunders (2010, p. 199), â€Å"people have power when they have the ability to bring about outcomes they desire or the ability to get things done the way they want them to be done.† Influence is â€Å"the actual strategies and messages that individuals deploy to bring about desired attitudinal or behavioral change,† (Lewicki et al 2010, p. 220). In most relationships there is power imbalances, including an organization structured to flow in a top-down direction. This is known as formal power and influence such as between a boss and his or her subordinate. â€Å"The power imbalance in these relationships stems from the asymmetry in dependence between the parties, which contributes to an asymmetry in influence between the parties,† (Emerson, 1962, p. 37). Problems Specified in the Case â€Å"What constitutes real power and influence in leadership† is addressed and whether â€Å"coercive tactics of wielding power over others† is even necessary. It is contended that the opposite is true in that â€Å"demonstrating real power and influence in leadership† holds back â€Å"usurping power to work with and  enable others to achieve worthwhile ends,† (Drew, 2010, p. 1). Possible solutions presented by the Authors The author explores three suggested solutions of enabling or real power and influence in leadership, each solution is accompanied by an element of paradox. The first suggests that â€Å"enabling or real power and influence does not usurp but serves.† The second is that an instinctual impulse of self-interest is diverted into a more socially acceptable interest for others and the intended goal. The third is that it fosters true engagement in leadership while positioning for growth for the self and others, (Drew, 2010). SWOT Analysis _Strengths_ In diverse coalitions, power and influence can be used to build a consensus. Real power is the ‘power to empower’. _Weaknesses_ In diverse coalitions, power without influence can bring about negative results. â€Å"Usurping power† and self-interest â€Å"tends to stultify and deny useful result,† (p. 7). _Opportunities_ Opportunities exist for leaders to use power to influence guided thinking, not so much to solve problems for people but to engage people in solving problems. _Threats_ Nothing is more important to building vital trust the prevalent state of leadership than that of credibility. A leader can lose credibility when power is misused and when strong professional will and humility are not found to be so effectual. Author’s recommended solution I agree with the author’s recommended solution that â€Å"genuine power and influence reverses the power paradigm, where the leader focuses primarily on the vision ahead more than (demonstrably) on self and partners with and enables others to reach shared goals,† (Drew, 2010, p. 2). Paradoxically, by enabling and empowering others with altruistic use of power and influence is a sign of â€Å"strength, rigor, and potentially rich outcomes† while wielding power just because one can, or for selfish reasons may on the surface seem â€Å"powerful† but could be displayed as weakness, stultification, and acquiring compromised outcomes. The paradox that â€Å"the only power is no power† assists an argument that may be inferred that â€Å"self aggrandizing power, in its bid to grab power, ultimately reduces the self, while resisting the exercise of usurping power expands the self and increases one’s potential for productive influence and authority,† (Drew, 2010, p. 3). â€Å"Self-interest for the interests of the goal† are sublimated by real power and influence within the â€Å"paradoxical proposition that genuine power results from giving rather than taking,† (Drew, 2010, p. 5). Real power and influence displays strength, not weakness within the paradox proposed is that real power and influence â€Å"eschews ‘soft’, uncritical approaches in favor of rigor, building a ‘culture of discipline’,† (Drew, 2010, p. 8). References Emerson, R. M. (1962). â€Å"Power-Dependence Relations,† American Sociological Review 27, 31-40. Drew, G. M. (2010). Enabling or â€Å"real† power and influence in leadership. Journal of Leadership Studies, 4(1), 47-58. doi:10.1002/jls.20154. Lewicki, R.J., Barry, B., & Saunders, D.M. (2010). Negotiation (6th ed.). Boston, MA: McGraw-Hill.

Figures of Speech

FIGURE OF SPEECH : A mode of expression in which words are used out of their literal meaning or out of their ordinary use in order to add beauty or emotional intensity or to transfer the poet's sense impressions by comparing or identifying one thing with another that has a meaning familiar to the reader. Some important figures of speech are: simile, metaphor, personification, hyperbole and symbol. Adjunction: Adjunction refers to a clause or a phrase, usually a verb, that is added at the beginning of a sentence. Here are a few examples of adjunction; Sings the bird as we walk on by. Good it is that fights the master with his dark lord, Allegory: This figure of speech is an extended metaphor where the characters or actions in a literary work have a more imaginative meaning. The examples of allegory are; I feel like a dog today. I rolled out of my basket and munched on some biscuit-like cereal. Scratching as I got on the train, I sniffed a passing female. Aruooo!! Down boy! – Animal Farm, George Orwell By this I perceive thou art one of my subjects; for all that country is mine, and I am the Prince and God of it. How is it then that thou hast run away from thy King? The Pilgrim's Progress, John Bunyan Alliteration: A repetition of particular consonant sound in the beginning of each word in close succession. Though alliteration is mainly consonant sounds, sometimes vowel sounds are also repeated. This figure of speech is mainly used in poetry. A few examples of alliteration: I have stood still and stopped the sound of feet. – Acquainted with the Night , Robert Frost Those tidal thoroughbreds that tango through the turquoise tide. – Dancing Dolphins, Paul McCann Allusion: An allusion is an indirect or brief reference to a person, place or thing in a literary work. A few illustrations of allusion – I doubt if Phaethon feared more – that time he dropped the sun-reins of his father's chariot and burned the streak of sky we see today – or if poor Icarus did – feeling his sides unfeathering as the wax began to melt, his father shouting: â€Å"Wrong, your course is wrong – Inferno, Dante This responsibility is too much for me. I feel as though I have an albatross around my neck. – The Rime of the Ancient Mariner, Samuel Taylor Coleridge Antithesis: An antithesis is a figure of speech where there is a juxtaposition of two contrasting ideas in a balanced clause or sentence. Some illustrations of antithesis: It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of light, it was the season of darkness, it was the spring of hope, it was the winter of despair, we had everything before us, we had nothing before us, we were all going direct to Heaven, we were all going direct the other way. – A Tale of Two Cities, Charles Dickens If, as our dreaming Platonists report, There could be spirits of a middle sort, Too black for heav'n, and yet too white for hell, Who just dropp'd halfway down, nor lower fell. – The Hind and the Panther, John Dryden Apostrophe: In this figure of speech, a non existent or absent person is addressed. In literary pieces, this figure of speech usually starts with an exclamation ‘O'. Examples of apostrophe are: O Romeo, Romeo! wherefore art thou Romeo? – Romeo and Juliet, William Shakespeare O, pardon me, thou bleeding piece of earth, / That I am meek and gentle with these butchers! / Thou art the ruins of the noblest man / That ever lived in the tide of times. Julius Caesar, William Shakespeare. Climax: In climax, the words or clauses are arranged in ascending order of importance. These phrases have a similar theme and arranged in increasing order according to the impact they create on the reader. A few illustrations; Love creates happiness, happiness creates joy, joy creates enlightenment. We'll collect pennies in tens, hundreds and millions! P ower starts small, becomes significant then becomes unstoppable. Euphemism: A figure of speech where an offensive or rude word is substituted by a polite and gentle word. The technique is to use a neutral language so as not to sound offensive to the receiver. Like for instance: Differently abled instead of disabled. Put to sleep instead of euthanasia Hyperbole: It is used while exaggerating something. This figure of speech is mainly used in several jokes or as a way of insult. It is to dramatize a normal situation or to make it look worse. A few hyperbole examples: The whole world was staring at me. It is going to take a zillion years to get through medical school. My backpack weighs a ton. Irony: Irony is used to convey the opposite meaning of a word. It is usually used in sarcasm or in humor. It is also used to convey an ugly truth in a subtle manner. Some examples of irony are: â€Å"Water, water, everywhere, And all the boards did shrink; Water, water, everywhere, Nor any drop to drink. † (Situational Irony) – The Rime of the Ancient Mariner, S. T. Coleridge The boy is so intelligent that he failed in all the subjects. (Verbal Irony) Metaphor: Metaphor is used for the purpose of comparison with a thing which is not applicable to it literally. It is an indirect comparison of two unrelated things. Some examples of metaphors include: He was a lion in the battlefield. He is the apple of my eye. Metonymy: In metonymy, the name of one thing is replaced with something that is closely related to it. In common terms, it is also known as misnomer or transmutation. Here are some metonymy examples: The suits on Wall Street walked off with most of our savings. (Suits referring to bankers). The White House asked the television networks for air time on Monday night. (Here air time refers to broadcasting). Onomatopoeia: This figure of speech imitates the sounds produced by the objects or actions. Mentioned below are some examples of onomatopoeia: The buzzing of bees. The whirring of the washing machine. Oxymoron: Using a contradictory term to define a situation, object or event is oxymoron. Some oxymoron examples are: Clearly misunderstood Exact estimation Personification: Associating an inanimate object to human quality. A few personification examples are: The haughty lion surveyed his realm. My car was happy to be washed. Simile: Simile is a figure of speech where two essentially unlike things are compared with each other, using ‘as', ‘than' or ‘like'. A few simile examples are given below: O my love is like a red, red rose. Life is like an onion: You peel it off one layer at a time, and sometimes you weep. Synecdoche: It is a part of speech similar to metonymy, where a part of a particular object is used to refer to the whole thing. Synechdoche examples are: The city posted a sign, where ‘the city' refers to the government. The gray beard refers to an old man.

Enthalpy of formation of calcium carbonate Essay

Objective To determine the enthalpy of formation of calcium carbonate Procedures A. Reaction of calcium with dilute hydrochloric acid 1. 1. 0909 g of calcium metal was weighed out accurately. 2. 100 cm3 of approximately 1 M hydrochloric acid was pipetted. and placed in a plastic beaker. 3. The initial temperature of the acid was determined 4. The weighed calcium was added into the acid and stirred thoroughly with the thermometer until all the metal had reacted. 5. The maximum temperature attained by the solution was recorded. 6. The experiment was repeated with 1. 0538g calcium metal. Results: Experiment no. 1 2. Mass of Ca used/ g 1. 0909 1. 0538 Initial temp. of solution/ ? 27 26 final temp. of solution/ ? 55 52 Temperature change/ ? 28 26 Calculations and Discussion: 1. What does the term â€Å"heat of formation† of a substance mean? Heat of formation refers to the heat change when one mole of a substance is formed from its constituent elements is their standard states under standard conditions. 2. What are â€Å"standard conditions† for thermochemical calculations? Standard conditions is defined as elements or compounds appear in their normal physical states at a pressure of 1 atm (101325 Nm-2/760mmHg) and at temperature of 25 oC (298 K). Moreover, the solution should have unit activity(1mol dm-3 ). 3. Write the equation for the formation of calcium carbonate under standard conditions. (Call this Equation 1) Ca(s) + C(s) + 3/2 O2(g) –> CaCO3(s) 4. Write an ionic equation for the reaction taken place. (Call this Equation 2) Ca(s) + 2H+(aq. ) ? Ca2+(aq. ) + H2(g) 5. Assuming (a) the solution in the plastic beaker has the same specific heat capacity as water, i. e. , 4. 2 kJg-1K-1 and (b) density of the acid is the same as that of water, i. e. , 1. 0 g cm-3. Calculate, in each experiment, the heat change in the reaction between the calcium and the acid per gram of calcium. For the first experiment: ?Energy evolved by the reaction= Energy absorbed by the acid ?By E = mc? T, ?H per gram of calcium = [(100/1000)(4200)(28)]/ 1. 0909 = -10780J g-1 = -10. 780kJ g-1 For the second experiment: ?Energy evolved by the reaction= Energy absorbed by the acid ?By E = mc? T, ?H per gram of calcium = [(100/1000)(4200)(26)]/ 1. 0538 = -10362J g-1 = -10. 362kJ g-1 6. Calculate the average heat evolved by one mole of calcium. For the first experiment:?H per one mole of calcium =[(100/1000)(4200)(28)]/ [1. 0909/40. 08] =-432066 J mol-1 =-432. 066 kJ mol-1 For the second experiment: ?H per one mole of calcium =[(100/1000)(4200)(26)]/ [1. 0538/40. 08] =-415329 J mol-1 =-415. 329 kJ mol-1 Average ? H per one mole of calcium (? Hx) =(432. 066 +415. 329)/2 =-423. 698 kJ mol-1 7. Why is the exact concentration of the hydrochloric acid unimportant? Approximate concentration of hydrochloric acid is not considered as one of the errors. In the reactions, limiting agents, i. e. calcium and calcium carbonate, must be reacted completely. Only these matter in the reaction but not the amount of H+(aq) provided in hydrochloric acid. Indeed, the concentration of the hydrochloric acid just affects the rate of the reaction. Therefore the exact concentration of hydrochloric acid is unimportant provided that there is enough H+(aq) to react with limiting agents completely. 8. Should we measure the volume of acid with a measuring cylinder? Why? The measuring cylinder should not be used to measure the volume of acid. This is because the heat absorbed by the acid must be counted when calculating the heat change of the reaction. As the acid has very high specific heat capacity, the errors in calculating the heat change of the reaction will be very significant if the heat absorbed by acid is not taken into account. Thus, the volume of acid should be obtained accurately to apply into E=mc? T in order to calculate the heat absorbed by the acid accurately. As the scale of the measuring cylinder is far from accurate, the pipette should be used instead. B. Reaction of calcium carbonate with dilute hydrochloric acid 1. 3. 0940g of dry powdered calcium carbonate was weighed out accurately and placed directly into a clean dry plastics cup. 2. 100 cm3 of approximately 1 M hydrochloric acid was pipetted into another beaker. 3. The acid was poured on the carbonate in the plastic beaker. 4. The solution was stirred briskly with the thermometer and the maximum temperature reached by the solution. was recorded. 5. The experiment was repeated with 2. 7400g of dry powdered calcium carbonate. Results: Experiment no. 1 2 Mass of CaCO3 used/ g 3. 0940 2. 7400 Initial temp. of solution/ ? 26 25 final temp. of solution/ ? 28 27 Temperature change/ ? 2 2 Calculations and Discussion: 1. Write an ionic equation for the reaction taken place. (Call this Equation 3) CO32-(aq. ) + 2 H+(aq. ) ? CO2(g) + H2O(l) 2. Calculate the average heat evolved by one mole of calcium carbonate. (Making the same assumptions as in Part A) For the first experiment: ?Energy evolved by the reaction= Energy absorbed by the acid ?By E = mc? T, ?H per mole of calcium carbonate = [(100/1000)(4200)(2)]/[(3. 0940/(40. 08+12. 01+16Ãâ€"3)] =840 /[(3. 0940)/(100. 09)] =-27174 J mol-1 =-27. 174 kJmol-1 For the second experiment: ?Energy evolved by the reaction= Energy absorbed by the acid ? By E = mc? T, ?H per mole of calcium carbonate = [(100/1000)(4200)(2)]/[(2.7400/(40. 08+12. 01+16Ãâ€"3)] =840 /[(2. 7400)/(100. 09)] =-30685 J mol-1 =-30. 685 kJmol-1 Average ? H per one mole of calcium (? Hy) =(27. 174 +30. 685)/2 =-29. 080kJ mol-1 3. Draw an energy-cycle linking Equations 1, 2 and 3 together, you must include reactions that had not been performed in the experiment. 2H+(aq. ) +Ca(s) + C(s) + 3/2 O2(g) CaCO3(s) + 2H+(aq. ) ?Hx ? Hy Ca2+(aq. ) + H2(g) + C(s) + 3/2 O2(g) Ca2+(aq. ) + CO2(g) + H2O(l) 4.. Besides your experimental results, what other information do you need to enable you to calculate the heat of formation of calcium carbonate? Look up these necessary data from any suitable source. The enthalpy change of formation of water: -286 kJ mol-1 The enthalpy change of formation of carbon dioxide: -393 kJ mol-1 5. Calculate the heat of formation of calcium carbonate. ?H? f [CaCO3(s) ] =? Hx +? H? f [CO2(g)] +? H? f [H2O(l) ] -? Hy =-423. 698-393-286+29. 080 =-1073. 6 kJ mol-1 6. As far as you can, list out the major sources of inaccuracy in the experiment and suggest ways to improve them whenever possible. Sources of error: – Heat loss to surrounding by evaporation, conduction and radiation. -The thermometer absorbed some energy. – The specific heat capacity and the density of the solution are not actually the same as those of the water. -Some of the samples failed to dissolve completely? – The reading of the thermometer is not accurate enough. -The experiment was not exactly carried out under standard conditions. -Some heat was gained by the gases, a considerable amount of heat is loss to surroundings when the gases are releasing. -The lid covering the plastic cups cannot prevent heat loss efficiently. -Heat capacities of plastic cups and thermometer were ignored. -The samples were not pure calcium and pure calcium carbonate due to air oxidation and reaction with moisture in air. Improvements -Use the vacuum flask calorimeter with a cork stopper instead of the polystyrene foam cup -Use a more accurate reading thermometer (e. g. Beckmann thermometer) – Find out the specific heat capacity of other materials other than water. -Use sand paper to remove the oxide layer on calcium metal. -Use powdered calcium instead of the granules in order to increase the rate of reaction ,so that the heat loss to the surroundings can be reduced 7. State the law which you have used in order to answer Question (5). The heat of formation of calcium carbonate cannot be determined directly by calorimetric experiments as there are several experimental difficulties : -The extent of the reaction cannot be controlled -Heat evolved cannot be separated into appropriate terms -Direct combustion of calcium can be violent -Side reactions may arise, for example, 2Ca(s) + O2(g) 2CaO(s) C(s) + O2(g) CO2(g) Then ,Hess’s Law is applied to calculate the heat of formation of calcium carbonate. Hess’s law states that the energy change for any chemical or physical process is independent of the pathway or number of steps required to complete the process provided that the final and initial reaction conditions are the same. In other words, an energy change is path independent, only the initial and final states being of importance. This path independence is true for all state functions 8. State the law which you have used in order to answer Question (7) depends? Why is this principle useful? The law of conservation of energy states that energy can neither be created nor destroyed but can be changed from one form to another. In order to achieve the answer, Hess’s law is used. Hess’s law states that the total enthalpy change of a reaction is independent of the route by which the reaction takes place. In other words, the standard enthalpy change of a reaction depends on the differences in standard enthalpy between the reactants and the products. It means that the enthalpy of the reaction system is conserved. As the absolute enthalpy of a substance is not possible to be determined and only the difference between reactants and products can be measured experimentally. This law helps us to define the standard enthalpy change of a reaction. Conclusion The enthalpy of formation of calcium carbonate is -1073. 6kJ mol-1. Reference http://hk. knowledge. yahoo. com/question/? qid=7006100200879 http://hk. knowledge. yahoo. com/question/question? qid=7007111800043 http://www. answers. com/8. %09Should+we+measure+the+volume+of+acid+with+a+measuring+cylinder%3F+Why%3F http://hk. search. yahoo. com/search/kp? ei=UTF-8&p=word%E6%89%93%E5%88%86%E7%B7%9A&rd=r1&fr2=tab-web&fr=FP-tab-web-t F. 6 Chemistry Notes Section III by Ms Sin W L.