Joules law Essay

Variables and constants   The one variable in this experiment will be the load placed upon the wire, this is the obvious variable because as seen in the formula. By rearranging the formula to; e = F L A E We can see that there are 3 main factors which will effect the outcome of the experiment. The E symbolizes Young’s modulus, which will be effected by changes but is not itself a single factor as it is a measurement of the factors. In order for the experiment to be a success, it has to be a fair test. Thus of course meaning that factors that need to be kept constant must be identified and kept that way. In this scenario I will be isolating Force as my variable. Force is directly related to the load on the wire; only multiplied by the gravitational pull (approx. 9. 81) as the load is measured in Kg as it is a mass. From the equation we can see that a change in Force will indeed affect the extension of the wire, at this stage it is apparent to say that; Theoretically the larger the force the greater the extension according to the equation above, as it is the value that is being divided. Following this it is also imperative that both the Cross sectional area of the wire is indeed accurately measured, as well as remaining constant through out the experiment, as a change in this value would indeed effect the value for Tensile stress, and in turn the extension. The length of the wire must also remain consistent through out the experiment. This is because each unit of wire will stretch or elongate by a proportional amount to the load being applied to it. Thus changing the length of will increase or decrease the amount of units of wire that can be stretched, causing different readings to be measured. The wire will indeed elongate and extend no matter what the length, but for these experimental purposes it is best to be long as explained above to stand a greater chance of measuring it properly. The important thing is to set the length of wire you wish to work with and do not change it. B) Implementing Results, observations and description. Cross sectional diameter of wire Measurement number and degrees of rotation 1/mm 2/mm 3/mm Average 0 Calculation of Average wire diameter= (0. 195 + 0. 185 + 0. 1925) / 3 = 0. 1908mm Thus the average cross sectional area of the wire is Force = mass   9. 81 ms. Table of readings Final length, attempt; Mass/g Mass/Kg Force/N Orig. L/M 1/M 2/M 3/M Mean Extension/ Unfortunately errors can easily occur in this experiment, the first way of minimizing the percentage error in the experiment is to identify the sources that could cause such a problem; these being. When measuring the extension there are 3 main sources of uncertainty. Meter rul Parallax error   Zero error I plan to minimize these by* Careful choice of meter rule, as man are bent and warped   Fixing a head and eye position against something so that the parallax error is minimized as I will be looking at the ruler from exactly the same angle.   Record results from 0. 0 M If there is a zero error, take it away from the results. When measuring the weight of the mass the following sources could effect the results; Zero error on the scales   Not allowing for the weight of the cradle Simply using the weight that is imprinted on the mass instead of weighting it. I will minimize these sources by selecting my masses carefully and weighing each one separately to find its exact weight, as well as double checking a pair of scales against each other by putting the same weight on both scales to see if there is a zero error. The final measurement source of error is the measurement of the diameter of the wire. This is typically a source of inaccuracy because the wire does vary in cross sectional area, because of the way it was made. This can be accommodated for by measuring the wire extremely accurately with the micrometer, and measuring the wire in three different areas of the length and taking two readings at each of the three points along the wire, twisting it 90 degrees at each point to allow for ovals etc. The average can then be taken and used in the calculations to give a better representation of the wire being used Diagram of ideal and misshapen wire. Observations for experiment conducted on the 14th of December 2002   At approximately 0930 the equipment was set up and the working area was in suitable condition to go ahead with the experiment as planned. I had two main concerns whilst conducting the experiments, these were of measuring natures, the first of these being that, when measuring the wire with the micrometer it proved initially extremely hard to turn the wire 90 degrees, I quickly remedied this by sticking a label on the wire so that it was clear what angle the wire had to be turned.   The second was that of concerning minimization of the parallax error, this proved to be quite challenging, so we decided to look at the ruler twice each a couple of seconds apart and in what i8 thought was the same position to see if it was a fair test. This way through up different results so we deemed it necessary to have someone stand over the wire and not move until the experiment was finished to minimize this risk.   Another observation I made was that I didn’t think we were measuring the extension accurately enough I felt that measuring it to 1mm was far to inaccurate as the extension as will be seen by the graphs was minimal, I will mention this point heavily in the Evaluating.   The equipment was packed away and the experiment was completed within the hour.   I observed a changing in mass or load on the wire and no change in any of the identified variables. C Analyzing Evidence and Drawing Conclusions. Force/N Area/M Sress/Nm (Pa) Length/M Extension/M Strain Youngs modulus 1 The stress was simple to calculate as it simply meant dividing the force by the area, as so; The strain is a simple ratio it involves dividing theextension by the length; Thus the young’s modulus can be found for every plotted point separately on the graph; this is done by dividing the stress by the strain. As I predicted earlier the material obeys hookes law and froms a straight line through the origin until the elastic limit is reached. As well as we can calculate the extension from the gradient of the graph because its equal to L / EA. When a material obeys Hooke’s law, then its force, extension graph is a straight line through the origin (see graph). This is only the case up to the proportional limit. The graph being a graph of force against extension, the area is the energy stored in the wire. As the equation of the graph is F=kx, the equation of the area is . From the graph we can say that as the load increases on the wire the extension also increases proportionally, up to a certain point known as the elastic limit, this is because it is obeying kooks law as described above, and for this material whilst under low load the strain is proportional to the stress.. 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 Electricity and Magnetism section.

Staffing and defining an arts organization Assignment

Staffing and defining an arts organization - Assignment Example that â€Å"Our main reason for being is to create theatre productions that reflect the Canadian experience of the past, present and future† (What we do, n. d.). The mission statement of the organization rest upon the values, which is expressed as- â€Å"we are very active in play development as a means of supporting Canadian playwrights and building the repertoire of Canadian plays† (What we do, n. d.). The director is more responsible for the artistic activities of the organization rather than engaging in the day to day activities of the organization. He must have the vision that the plays staged by the organization must be unique and uphold the values of the organization enunciated by the founder. He must be a person of long term vision as the organization’s future id relied upon how competent he is in keeping the studio upfront of similar organizations. Similarly, he must have good managerial abilities and leadership qualities as he is the person responsible for coordinating the whole activities of the organization. He should have a good foresight and motivational qualities. He must motivate the entire people in the organization so that the objectives can be

Price Determination under a Freely Operating Market System Essay

Price Determination under a Freely Operating Market System - Essay Example This helps in the determination of the type of goods to be produced and the quantity of that particular that is required to be produced. Now, whether a consumer of the goods would buy it or not helps in the determination of the quantity of a particular type of goods to be produced (Haber, 2000, p.10). The recent fall in prices of residential properties in UK has been explained using the market theory in this study. Determination of Price in a Market A market can be considered to be composed of two of its fundamental components. They are: supply and demand. The price of a commodity is determined through the interaction of these two market forces, i.e. supply and demand of the commodity in the market. As discussed earlier market is a place where exchange of commodities takes place between the suppliers and buyers. However this type of transaction can take place only when both the sellers and buyers have agreed upon a price for the particular commodity that is involved in the transactio n. Supply can be defined as the quantity of goods or services a business firm has in offer for sale in the market and it is offered at a pre-determined price set by the business firm. On the other hand, demand is the quantity of goods or services which the consumers are willing to buy at a specified price (Goldberg, 2000, p.72). In a freely operating market system, the sellers and buyers are free to carry out the transaction of goods and services at a mutually agreed price and they are not intervened by any other individuals or entities. Thus in a free market the prices of the goods or services are freely set and are based on the supply and demand of the transacted goods or services. Some of the key determinants of a free market economy are: a) Prices determined freely, b) Rights and incentives associated with the property, c) Freedom of trading at home or abroad, d) Government’s role, and e) the private organisation’s role (Taylor, 2006, p.14-15). Equilibrium Price Fi gure-1 shown below represents two different curves which are the supply and demand curves. Both of these curves are found to intersect at a point which is known as the point of equilibrium. It is actually the market’s equilibrium (Government of Alberta: Agriculture and Rural Development, 2012). The corresponding quantity and price of products at the point of equilibrium are known as equilibrium quantity and the equilibrium price. It is the actions taken by the sellers and the buyers which help in driving the market towards this equilibrium price or in other words the equilibrium of the supply and demand (Mankiw, 2011, p.77). Figure-1 Equilibrium Price Supply Equilibrium Equilibrium Price Demand Equilibrium Quantity Source: (Author’s Creation) Residential Property Prices in UK It has been observed that the prices of residential properties in United Kingdom (UK) have fallen considerably over the past few years. This observed phenomenon can be explained through the market theory involving the two market components, namely, supply and demand of the residential properties in UK. The world economy along with UK experienced a housing boom

Nursing Shortage Essay Example | Topics and Well Written Essays - 750 words

Nursing Shortage - Essay Example tions and there is need to change in order to improve quality of healthcare services and increase customer satisfaction by increasing staff ratios in healthcare facilities, introduction of worker retention incentives, development of placement programs and training of more nurses to meet the demand (Satterly, 2004). The stakeholders involved in this kind of change include the government, nursing professional bodies, community representatives, healthcare training institution’s heads, and the nurses. The government allocates more funds for building more training institutions, training of nursing personnel and development of placement programs. The change will also demand that the heads of training institutions expand their capacities by admitting more students. The community leaders are expected to report the level of shortage and engage in developing policy frameworks to address the issue. Nursing professional bodies also have to be up to date in terms of the demand and supply of nurses and will have to engage in identifying areas of high shortage and advice the government on how to deploy (Ross, 2005). Nurses are the subjects in this case and they understand the problem more clearly by implementing change to address the problem of nursing shortage nurses are expected to provide leadershi p and serve as role models encouraging more people to join the profession. Lippit’s Theory used to implement change is the most appropriate for solving the problem of shortage of the nurses. The theory is about finding an external agent to effect change. Here I will propose that one person experienced in the nursing field with transformational leadership mind should serve as the coordinator of the entire process of change. Shortage of nurses can be solved by following the steps of Lippit’s Theory (Feldman, 2013 ). The first stage is diagnosis of the problem. Here the leading nurse who is the transformational leader realizes that the problem of nurse shortage is real and

Morality Essay Example | Topics and Well Written Essays - 1500 words

Morality - Essay Example f Catholic moral thinking. Reason informed faith The Catholic Church worked to cease the dichotomy of rational morality and faith morality, otherwise understood as pure humanism and sectarianism (Gula, 1989, p. 1). For the believer, faith and reason can be integrated in its moral tradition to make Christian teachings more understandable for non-believers as well. This is also explicated in Humanae Vitae published in 1968 which pointed that natural law is further made significant by divine revelations as well as in the scriptural writings (Gula, 1989, p. 1). The latter upholds that the moral principles can be taught, using logical inferences of reason, from the perspective of faith (Gula, 1989, p. 32) The bishops have likewise applied this moral framework to resolve the issues on homosexuality which articulated the rational capacity of human beings to understand gender and sexuality; illumined by faith (Gula, 1989, p. 25). This theological position of the issues of morality is also ap plicable to the problems and issues of bioethics, scientific innovation, and other development which put the Christian teachings under social and moral dilemma. Notwithstanding the pressures, the church consistently stood for the dignity of creation and the need to respect human rights. As such, the Catholic Church maintained that such human dignity cannot only be understood separately by reason but by unquestioning faith with conviction that dignity is a gift of God given to any person, even if the same be interpreted using the laws of nature. As such, every person needs to possess an informed faith, illumined by reason, to understand the strategic goal of moral life and on how to behave well as a moral agent. Every Catholic believer must be imbued with wisdom about the role of being as a moral agent. And, as a faithful, must have a reference which served as the criteria for moral judgment (Gula, 1989, p. 9; Blair, 2010, p 1). Common issues with humanity Like other institutions on earth, the Catholic Church is also mocked and rocked with variegated issues (Hamilton, 2013, p. 1). There were instances when the church is being subject of corruption, sexuality, questionable financial relations with state agents, and other social issues such as their involvement in extractive industries, in corporate leveraging, and in amassing real estate properties at the expense of those property-less and those that are bereft of economic capacity to meet even the most fundamental need—food (Hamilton, 2013, p. 1). The resignation of previous Pope was even controversially tagged with varied issues on corruption and political machinations due to some alleged transactions done. There were many priests that were allegedly responsible on sexual relations, which violated the dignity of women;

Data as an Asset Assignment Example | Topics and Well Written Essays - 250 words

Data as an Asset - Assignment Example The changes in privacy laws will prohibit companies from using consumers’ information without their consent, thus protecting the privacy rights of all consumers (Education Week, 2015). Netflixs "recommender system" is a software program that is designed to learn about users by gathering data about them and drawing conclusions. â€Å"Machine learning† employs Artificial intelligence to recognize the needs of customers that uses the services of a particular company (Newitz, 2009). Computers can now supply the information that was used to be provided by individuals. Artificial Intelligence is the pillar behind Maps, Siri, and Passbook; gadgets are now able to do great things without help from users (Jackson, 2012). Rather than requesting users to rate products on a five-star scale, Netflix’s recommendation systems need to ask them to evaluate products in pairs; it will offer a correct representation of preferences of consumers. Besides recommending movies, Netflix needs to diversify and support music and games. Music and games are lucrative areas that will benefit the company. Users should be afforded an opportunity to offer feedback on how to improve the recommendation system. Netflix can offer a platform where users can give feedback on the effectiveness of the system. The three changes must be included in the system as part of the platform. Jackson, E. (2012). Whats Going To Be Apples Next Killer Product? Not a New iPhone- Artificial Intelligence. Retrieved on January 6, 2015 from http://www.forbes.com/sites/ericjackson/2012/10/09/whats-going-to-be-apples-next- killer-product-not-a-new-iphone-artificial-intelligence/ Newitz, A. (2009). Annalee Newitz-Artificial Intelligence and the Netflix Prize. Retrieved on January 6, 2015 from

Industry issue Assignment Example | Topics and Well Written Essays - 1500 words

Industry issue - Assignment Example Various countries have tyre ratings to guide manufacturers in the production of quality tyres. In addition, the tire ratings help the consumer to select the right replacement for the worn out tyre or when buying a new tyre. Consumers should have the chance to compare the tyres’ treadwear, temperature resistance, and traction performance. Each tyre manufacturer is required to grade their tyres according to tyre rating guidelines, as will be discussed in this paper. Dunlop tyres will be discussed, too. Although tyres are often taken for granted, they contribute significantly to the safety of the driver and the vehicle. The failure of the driver to use proper types of tyres, incorrect inflation pressure, and worn out tyres can lead to dangerous driving, thereby causing loss of life and property. When tyres and wheels are out of balance, tire wear and driver fatigue are increased, which may create a driving hazard. A tyre’s resistance to heat is referred to as temperature rating. Tyres are graded according to how they can resist heat. For instance, high temperatures can cause a tyre puncture. In addition, driving in hot weather for long distances can lead to tread separation and blowouts in tyres. The highest to the lowest temperature rating includes grades â€Å"A†, â€Å"B† and â€Å"C†. Grade A tyres are said to have a higher temperature rating that grade B and C. All Dunlop tyres have a grade of temperature rating (Knowles, 2010, p. 62). The ability of the tyre to stop on a wet surface is referred to as the traction performance. High traction rated tyres should enable drivers to stop their motor vehicles on wet roads faster. However, tyres with a lower traction performance cannot allow drivers to stop fast on wet surfaces. Traction performance grades include â€Å"AA†, â€Å"A†, â€Å"B†, and â€Å"C† (highest to lowest) (iSeeCars,