The rate of reaction Essay Example for Free

The rate of reaction Essay The graph is below: The reason why I felt that the rate of reaction is proportional to the acid concentration is that from my understanding I feel the higher the acid concentration the faster the rate of reaction, which I have backed up with scientific evidence previously. Towards the end there is a slight bend, the reason why I have incorporated this is that I feel that it would begin to gradually level off to 0. 01 seconds as I feel it would be incorrect to suggest that with a acid concentration of fifty millilitres it will take 0. 01 seconds to react with the acid when at forty millilitres it takes 250 seconds. Now that I have a solid understanding of what I am going to do in the investigation and have a rather strong prediction with accompanying evidence I am now ready to begin. The results I have retrieved are below: Acid/Water (ml) Time 1 Now that I have retrieved the results successfully I am now going to display the results graphically in a graph to interpret, determine any patterns and anomalies etc. The graph is displayed below: Now that I have completed the practical aspect of the investigation I can now safely say that overall it has been successful and everything has gone according to plan. As you can see from my graph it is apparent that the results partially agree with my prediction as there is a positive correlation between the time and acid concentration and they increase at a relatively proportional rate. From this graph I have discovered that there is a relatively high possibility there is a few anomalies, or the test was not done correctly. This could be due to a multitude of reasons, from starting the stopwatch slightly later to not having the magnesium exactly 1cm. So to combat this problem I have drawn a line of best fit onto the graph which is an additional line that goes through the middle of all the results to give me an average. From my line of best fit it is now apparent that the more acid, the quicker the reaction time which means in scientific terms, the higher the acid concentration, the faster the reaction rate which is exactly what I predicted in my prediction. Towards the end of the normal-line there is a curve, this again could be due to the line levelling of to 0. 01 seconds as I suggested earlier. I felt that the experiment was quite accurate, but due to the nature of the investigation it is clear that it is almost impossible to get completely accurate results, for example when I attempt to time the reaction rate it is extremely probable that I will not begin the stopwatch at exactly the same time as the magnesium impacts with the acid and water. Due to the problems that could arise, I have insured that I have done numerous tests so that I can get an average, which is susceptible to be more accurate then the results from a few tests. To make the experiment more accurate I feel the only solution would be to dramatically increase the number of tests I undertake and get averages from them. I felt that it is possible, looking at the shape of the line that there may be one or two anomalies in the data, but they are not dramatically different in comparison with other results, therefore I feel it is solely due to human error and slight inaccuracies. I think that the methodology I used was suitable for the experiment as everything went well enough for me to retrieve quite accurate and reliable results, while also making sure the test is as fair as possible. I feel that the data was originally not entirely accurate and reliable as there are no repeated results, which is what you would expect to find in accurate data, but to solve this problem as best as possible I have used the averages in the graphs. To extend the original problem I am going to do another test where I will replace the magnesium with another element, which is going to be the highly reactive potassium (K) and see how that makes a difference to the reaction rate. After completing this, if the shape of the line followed a similar pattern to the previous tests then this would dramatically support my evidence and prediction. The chemical equation is below 2K + 2HCl - 2KCl + H2 The results I have retrieved from the tests are below: Acid/Water (ml) Time 1 (S)Â  To make the data easier to analyse and interpret, I am going to place the data into a graph which is located below: From the graph it is evident that there is a positive correlation and that the rate of reaction increases at a relatively proportional rate to the acid concentration which is exactly what occurred in the previous experiment. The only major difference is that the overall reaction time is significantly quicker, which is almost certainly due to the fact that potassium is higher then magnesium in the reactivity series. This helps me significantly prove the below statement. From this investigation I have found out that the higher the acid concentration the quicker the reaction rate as there is more acid particles to collide with the magnesium, which I have thoroughly backed up in numerous ways. This document was downloaded from Coursework. Info The UKs Coursework Database 1 Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Patterns of Behaviour section.

Gun Control Essay -- Second Amendment The Right To Bear Arms

Since the early days, gun control has been a never-ending debate. It is because of the fast increase in crime, the fight for the right to own a hand gun, the introduction of legislation for gun control in order reduce the crime in the United States, that this issue has been hotly debated in recent years. The streets of America are now a war zone especially right here were we live. ?Florida has the highest crime rate of any state and the sixth highest homicide level?(www.guncite.com). A sad fact but true. Many people feel that gun control violates their right to own a gun the second amendment says so: ?the right to bear arms?. I personally share that point of view for it would not be in the constitution to begin with. However, there is no doubt that something must be done in order to reduce violence and to make America a freer country to live in. I believe that gun control should not take place for it does not reduce crime, it only increases the debates and as an alternative there sho uld be a stronger education. First, gun control does not reduce crime. After doing my research I was impressed to find that guns and violence are not as linked as much as people think they are. Curtis Lovelace confirms that Both Australia and England have already banned personal ownership of guns, but violent crime is not down in either country. In fact, in Australia violent crime is up in every category. From 1997 to 1999, murders were up 6.5%, and attempted murders rose by 12.5%. Increases w...

Employee voice Essay

‘Employee voice’ suggested by Geoff Armstrong (cited in Armstrong,2001) in the recent issue of Industrial Participation Association (IPA) Bulletin, historically meant collective bargaining, and that this ‘chosen method of joint regulation became a straitjacket inhibiting the very things we needed to be doing to win and keep customers! ’ Win and keep the customers because feedbacks and suggestions came from the employee who deals with the customers every day of their work. Companies are able to get the facts from how the customer complaint about their product and to what satisfies them. The word ‘voice’ was popularized by Freeman and Medoff (cited in Freeman & Medoff, 1984) who argued that it made good sense for both company and workforce to have a ‘voice’ mechanism. This had both a consensual and conflictual image; on the one hand, participation could lead to a beneficial impact on quality and productivity, whilst on the other it could detect problems which otherwise might ‘explode’. Dundon et al (cited in Dundon, 2004;MC Cabe & Lewin, 1992; Wilkinson et al,2004). The four principal strands of the thought or forms of ‘voice’ that are available to employees are: an articulation of individual dissatisfaction; existence of a collective organization; a form of contribution to the management decision-making; and as a form of mutuality in the organization. In the articulation of individual dissatisfaction, the employee aims to address a specific problem or issue with the management that is usually presented in the form of grievance procedure or ‘speak up’ program. An opportunity for employee representatives – union or non-union – to communicate the views of the workforce to managers either through partnership or collective bargaining is the form of collective organization. As a form of contribution to the management decision-making its purpose is concerned with improvements in work organization and efficiency more generally, perhaps through quality circles or team working. It is achieve by a dialogue with employees providing ideas to improve the organizational performance. The last form is the mutuality in organization in delivering long term viability for the organization and its employees, often through joint consultation, collective bargaining and or partnership. In an article by Sharon Shinn (2004,p 18), The Maverick CEO, he asked Ricardo Semler that if business students were reading a case study of Semco what was the valuable lesson they would they take away and he answered that, â€Å"the main lesson is that freedom is a prime driver for performance. † Through my research I believe that all of the employees’ benefits from ‘employee voice’ just revolve around Semlers’ idea. When an employee has the freedom to express himself it empowers him to decide the courses of action that must be done to achieve a certain objective of the company according to his ideals in work and life in general. When one has the freedom to say what for him is wrong or right it gives him the dignity of not only a worker of the company but someone who can make a change and influence people on top for the better future of the company. A sample of the ideal is displayed in Semco where employees can vote to veto new products or new product ventures. At Semco, (cited in Samler, 2004) â€Å"workers approve their own bosses and people only attend meetings if they think the meetings are important. It works because of peoples’ self-interest. Nobody wants to stay in boring meetings or work for bosses they didn’t choose. † Furthermore, â€Å"of course, you can make people come to meetings and look alert, but it’s more difficult to get them to perform what was decided at the meeting. We want people to follow their instincts and to choose as bosses people they respect – even if they don’t like them. This often happens at Semco. † ‘Employee voice’ can be channeled between union and non-union voice. Comparison of benefits between union and non-union voice has been noted. (cited in Freeman and Medoff, 1984) argued that only union forms of voice would result in voice benefits for workers and management. The reasoning behind this argument is that without a union to ensure fair treatment and an equitable distribution of the fruits of success, individuals lack the incentive to pursue public goods. Union voice promotes ‘independence’ unlike direct voice mechanisms’ where its effectiveness is challenged in their capacity to transform the power relations in an organization due to lack of sanctions for non-compliance, collective power and access to independent sources of advice or assistance, non-union voice mechanisms are more susceptible to managerial influence and control (cited in Golan,2009; Terry,199; Wilkinson et al, 2004). On the contrary, non-union or direct voice has been also argued to be superior to union voice for 2 reasons: first, barriers between employers and employees can be disintegrated by dealing directly with employees rather than through an intermediary (cited in Bryson, 2004; Storey, 1992); and second, direct voice allows managers to better respond to the heterogeneous interests of workers (cited in Storey,1992). Another distinct benefit of ‘employee voice’ is evident in the ‘monopoly face’ of unionism, whereby unions seek to restrict the supply of labor to the irm in pursuit of higher wages and benefits. In a general point of view because of the ‘employee voice’ managers give more positive responses to employee needs, greater levels of control over the work process and increased influence over job rewards. In relation with the benefits that can be gained by employees’ through ‘employee voice’ the said firms that practices this kind of system have a lot to gain out of it. One important factor that affects the companies’ profitability is its labor cost. Voice is considered important, in their classic work on US trade Unionism, (cited in Freeman and Medoff, 1984) post it that it is theoretically possible for trade unions to enhance the productivity of firms because they provide voice to workers. They argue that union voice can be productivity-enhancing where voice costs are lower than the costs of dissatisfied workers quitting, and lower quit rates encourage firms to invest in human capital, resulting in a more skilled and productive workforce. In union voice it may also reduce the transaction costs that employees face, for example, by enforcing and monitoring contracts (cited in Booth, 1995; Kaufman, 2004; Kaufman and Levine, 2000). The company of Semco is a great example of this, (cited in Shinn, 2004) Semler and a radical management team completely upended traditional business theory at Semco, doing away with conventional organizational charts while allowing employees more and more freedom to choose what products they would work and how they would produce them. Many employees were eliminated by job reconstruction or left because they couldn’t handle the turmoil. But those who remained became passionate about Semco and their place within it. At Semco they also believe in continuous growth and development so (cited in Samler, 2004) â€Å"people at Semco, by setting their own timetables and workloads, are more apt to take time out for learning. † He said that there were also sabbaticals, and a system whereby people can diminish and increase their work weeks by arrangement with their teams. They also have Retire-a-little where people can take a day, or half-day, off every week, to do what they would when they retire. Because of such changes, (cited in Semler, 2004) noted that it have raised Semco’s revenue from a $35 million to $160 million in the last six years. In addition, (cited in Shinn, 2004) Semler is deeply involved in promoting a workplace where freedom and flexibility is celebrated that he established a school in Sao Paolo practicing his values. (cited in Samler ,2004) â€Å"the school is in place and has started enrolling two-to-ten year olds. We want to change things at the starting point. At this school, our kids determine the rules and makes decisions ever week at a school meeting. We don’t want to holler and point fingers at kids. They are perfectly able to settle disputes and regulations alone. We do sit in to facilitate, when they want. † Furthermore, â€Å"at the Lumlar Institute, which runs the school, we develop a mosaic technology to teach free children effectively, something that the educational world knows nothing about. Since our kids are obliged to be in school but not in class, it behooves us to interest them – and we do. Children are already staying 1. 84 times longer at our school, out of free will, than at other schools in the system. After defining that there were two system of ‘employee voice’ which are non-union (direct) and union, in addition reviewing the benefits of implementing ‘employee voice’ to both the employees and company, Australia seems to place more importance to non-union voice that than union voice. Result from the studies of researchers proves that, for example, AWIRS (the Australian Workplace Industrial Relations Survey) shows that only 16% of work places were there employee representatives on boards in 1995. (cited in Morehead et al, 1997; 506-67). Moreover non-union of employee representation was not institutionalized as they are in EU (European Union). With the Decline of Union membership, with 22% of employees now being unionized (and only 17 percent in the private sector), there is a growing ‘representation on gap’ for employees’ with some academic experts arguing that works councils could fill that gap. (Knudsen & Markey, 2002). However, there seems little political will to progress this issue at the moment, with major interest focused on the recent Work Choices Legislation, rather than a broader discussion of work place governance. Thus, it appears that for the most part, participation in Australia will remain a matter for the firm rather that a broader social issue and its extent will be largely governed by management strategy and enthusiasm for the various direct participative approaches. Pyman et al (2006) In practical sense, the effectiveness of employee voice in Australia workplaces is dependent on a plurality of arrangements, that is multiple, mutually reinforcing channels. While achieving this is likely to present challenge for employers, employees and unions, the findings to do highlight the significance of labor- management interaction and thus the value of a union-employer partnership approach predicated on mutual benefits. Such an approach is seriously threatened by the recent changes embodied in the Work Choices Act 2005. This legislation unequivocally privileges direct or non-union representative voice mechanisms, while undermining union voice and multi-channel voice arrangements.

The Art of Video Games - 833 Words

Video Games is an electronic game that involves human interaction with a user interface to generate visual feedback on a video device. The word video in video game is because it shows the game on a Display device such as TV or Computer, but now Video Games can be shown on any display device that can produce two or even three Dimensional Images. The electronic device that was used to play the video games known as platforms, The example of some platforms that was used to play the video games is PC (Personal Computer) and Video Games Console, but nowadays Mobile Phone is also used as a Video Game Platforms, These platforms range from a device that has a large Mainframe Computers to small handheld devices such as Mobile phones or Portable Video Games Device .Old Version of video games such Arcade Games, while previously known ,Is now rarely used because of its lack of specs. Video games have gone on to become an art form and industry, because the creator can pour their imagination into t he video game. The Device that primarily used to control video games is called a Game Controller. Every Controller have different look, some controller only have one joystick and a bunch of buttons, and sometime they only have buttons. But nowadays the PC (personal Computer) only needs a Keyboard and a mouse to control the games. Some computer games allow the player to use a keyboard and a mouse simultaneously, nowadays they have like touch sensitive controller on the touch-screen mobileShow MoreRelatedArt and Video Game867 Words   |  4 PagesHistorically video games have been considered a novelty or technical subject, but in recent year given the increase in technology video games have been able to show that they are more. While not a traditional art form, video games do have an artistic basis. Video games are increasingly becoming more story and visually based. 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