Effect of Battery Voltage on Output

Effect of Battery Voltage on Output Andy Nguyen Table of Contents 1.0 Introduction 1.1 Theory Review 1.2 Hypothesis 1.3 Materials Risk Assessment 3.0 Results and Analysis 4.0 Discussion 5.0 Conclusion 6.0 Appendix 1.0 Introduction The homopolar motor device or also known as unipolar motors are commonly used in everyday society. For example, it can be related to an electric circuit in cars or in high torque wind turbines. But in this case, the homopolar motor consists of an AA battery, copper wire and a neodymium magnet. The aim of this experiment only using this setup is to see how the voltage of the battery affects the number of times the wire revolves around the battery and magnet. It was hypothesised that the larger the voltage or battery, the longer it took to revolve around the battery as size is determining the current output. 1.1 Theory Review The magnet used in this experiment is called a Neodymium also known as Neodymium-iron-boron. This is a rare earth magnet and is stronger than the average magnet. It has a high resistance to demagnetization and its energy content level is high. If these magnets are not carefully stored or used properly, it can have major effects on the magnet such as corroding or caught on fire if used in high temperatures. Like any other magnet, the Neodymium magnet has a North and South Pole and depending on which side it’s used, it affects the direction in which the wire is rotating. Alkaline batteries are commonly used to make an electric device work. It contains chemical energy which then converts to electrical energy when placed in a device such as remotes and toys. An alkaline battery contains to electrodes, anode and cathode. Anode is an electrode through which electric current flows into a negatively polarized electrical device. A cathode is when the electrode flows out of the positively polarized electrical device. When electricity is run through a loop or coil of wire, the electricity has passed through a magnetic field, refer to appendix 3. The Neodymium magnet has both North and South Pole which attracts and repels the current flowing through the rotor thus creating a constant torque which leads to the loop of wire spinning. This repetitive attracting and repelling can go on continuously as long as a stable current goes through it. To find out how the radius of the wire affects the speed of the revolutions, angular velocity must be found. Angular velocity can be considered as a vector quantity thus this unit is measured in radians per second. The formula for angular speed is: Where is the revolutions per minute and is the time taken in seconds. The formula is then multiplied by for the full circular motion unit for a circle is measured in radians. Polarisation is when the charges inside a particular object is split and separated into each ends away from their distinctive other. A magnet for example, when polarised has two poles, where one end of the pole consists of positive charges whilst the other end will consist of negative charges. This concept determines the direction at which objects rotate. 1.2 Hypothesis It was hypothesised that the bigger the radius of the wire, the slower the angular speed will be. But as the voltage is increased using the same radius, the angular velocity of the copper wire will increase. Increasing the copper wire to a bigger radius and changing the voltage of the battery would have an effect on the speed of the revolutions. This should be due to the copper wire having to travel around a larger battery which means more time for the wire to revolve. 1.3 Materials 1.5 Volt Alkaline battery Neodymium magnet Copper wire Pliers Smart phone 1.4 Safety Risk Assessment The only hazard from this experiment is the possibility of being poked by the wire, having a slight burn on your fingers from the heated wires or to jam your fingers in between magnets. To prevent this from happening, there must be a lot of caution when handling the experiment, such as being alert where the wires are and not holding on to the wire for too long, as it may cause burn and also to keep all magnetic objects away from the neodymium magnet, as it is a very strong magnet and can jam your finger between objects or a sharp object. 2.0 Method Experiment measuring how radius (r) and voltage (v) affects angular speed Place the neodymium magnet on a flat surface Place the negative (flat end) of the AAA battery onto the neodymium magnet. Use pliers to cut the wire to appropriate length. Mould and bend copper wire so that wire has a radius of 2cm from centre and make the two ends of the wire spiral down the battery and touch the magnet. The copper wire will move in a circular motion when the ends of the wire touch the magnet, record with smart phone. Review recording in slow motion and measure revolutions/minute. Repeat steps 2-6 for radii 3cm and 4cm. Repeat steps 2-7 for AA and D batteries. Refer to Appendix 2 for picture of experiment. 3.0 Results and Analysis Figure 1 Figure 2 In figure 1, it shows that 1V (blue) and 1.5v (red) has a correlation with one another as a result of their respected lines almost being parallel. This is due to the two wires having almost the same voltage from the battery which would mean that the rpm would almost be the same. 3.1 Error Analysis Table one show the result of the three different sized radii’s that was moulded to find the angular speed. A number of three trials were conducted to ensure that the results that were given were not abnormal and were accurate. Each trial went for 60 seconds each and the averages of the speed were calculated. In each trial, a margin of  ±1 was used since the copper wire stopped halfway or not completing the rotation. As shown in table 1, it is clear that the bigger the radius of the wire, the slower the angular velocity. The difference is only slight because of the small difference in the radius of the wire. 4.0 Discussion The results of the experiment support the hypothesis that, when the radius of wire was widened, the slower the revolutions per minute. But when it came to increasing the voltage of the battery, there was an increase in revolutions per minute. By using the same radii that were used in the previous experiment for the AAA battery, the speed is increased when the AA battery was used. Then the revolutions per minute were significantly increased when using the D battery due to the amount of voltage in the D battery. From the data collected in table, angular velocity was able to be found using calculations shown in appendix 1. When the three batteries are compared, it is clear that as the battery voltage is increased, the faster the angular velocity. Even though increasing the radius of the wire affects the speed, it still supports the hypothesis that as the voltage is increased, the faster the angular velocity will be. As expected, the larger the amount of volts the battery discharges, the more current flows through the copper wire, causing it to have a higher revolution per minute rate. The greater the current flow the larger the magnetic field that is produced around the wire, and more force is produced to act upon making the wire spin. The copper wire that was used was incredibly thin so there was not a lot of contact with the battery or the magnet. Since the wire is thin, there is a small path in which the current flows in which only give the electrons to flow in a straight line. If the wire was thicker and bigger in diameter, then there would be less resistance since the electrons would be able to flow freely. Since the batteries have a significantly low resistance, the electrons are free to flow easily through the thin copper wire. Therefore the factor of the resistance can be excluded when measuring the angular speed. With the data collected, it was used to make a graph which showed the relationship between the volts of the battery and the angular speed. The vertical lines on the graph represent the margin error of  ±1 since the wire did not complete the full revolution. Other possible errors that could have occurred while gathering this data was the rounding error, to minimize large numbers, two significant figures were used. Copper wire loses conductivity after each consecutive trial without cutting the ends off. With the discovery of this possible error, cut the end bit of copper wire so that the conductivity would be the same each time which would make the results as accurate and precise as possible. Another possible source or error for this experiment is if the wire fell off the battery halfway through its rotations and/or if the ends of the copper wire lost direct contact to the magnet and slowed down during its rotations. These possible sources of error could be prevented by creating a slight dent on the battery to create a little hole for the wire to sit comfortably on and to create a solid spiral down the battery so that the ends don’t become loose and lose contact with the magnet. So that the results could be as precise as possible, because if the ends of the copper wire lose contact with the magnet, it loses the velocity and momentum and would slow down, and thus affects the rpm. Another possible source of error is drainage of the battery after consecutive trials causing less voltage to flow into the wire thus affecting its angular velocity, this could be prevented by using a power pack instead of battery. 5.0 Conclusion In conclusion, the results that were gathered supported the hypothesis that even with a larger radius, when increasing the voltage of the battery, the angular speed is increased. As the results show that the D battery, although larger radius than the AA battery, still had twice the amount of revolutions per minute because it had twice the amount of voltage. 6.0 Appendix Appendix 1 Using the formula for angular speed: Appendix 2 Appendix 3 Appendix 4

The ideas of classical economists

Dry James Anagram Synopsis The purpose of this work is to examine and understand the main thoughts of prominent economists during the classical period, namely Adam Smith, Thomas Malthusian, David Richard, Jeremy Beneath and John Stuart Mill. It is also included the comparison of ideas between these masters and last but not least, the contributions of these Ideas In today's context.At the beginning, the background of the classical period Is provided to ensure that readers have a better understanding of the economist's ideas. Followed by that, each economists ideas will be discussed respectively, and the comparison will be made. The contributions of Adam Smith, David Richard and Thomas Malthusian will be discussed in the last part and conclusion would be drawn. Content Page No.Page number Introduction 4 2 Background 3 The Five Prominent Economists Adam Smith Thomas Malthusian David Richard Jeremy Beneath John Stuart Mill 5 6 7 Comparison of Ideas between the Five Economists 8 Contribut ions of Classical School in Contemporary 9 Conclusion 10 Bibliography 11 Appendices 12 Classical school started during the late 18th century, when Adam Smith published his independent field of study and set forth the development of modern economics. Their ideas such as division of labor and comparative advantages are still discusses and implied in today's world.The work of this paper is to examine the main thoughts of five leading economists of classical period, namely Adam Smith, Thomas Malthusian, David Richard, Jeremy Beneath and John Mill and to compare their thoughts and concepts. Also, the relevance of contributions of their ideas in today's context will be discussed. Background Before classical period there was mercantilism period (1500 – 1776). During that time, manipulations and government intervention in the market is being practiced. Wealth of a nation is weighed in terms of gold and silver that a country possessed.Therefore international trade is discouraged by th e implementation of tariff, in order to prevent wealth flowing to other countries. However, as scientific revolution and industrial revolution take place, it helps to nurture the ideas of classicists. (Refer appendix 1 for influence of scientific revolution) There are a few main features in classical economics thoughts. Firstly, classical economists advocate free trade in rake. Without government intervention, the economy could self-adjust to achieve full employment. Secondly, each party, I. E. He merchants, workers and consumers will each seek self-benefit as it is in the human nature. Hence, harmony of interests will be achieved when the pursuit of self-interest will eventually leads to the best interest of the society. Thirdly, classicists consider all economic resources such as land, labor, capital and entrepreneurship as the nation's wealth and lastly, the classicists made a remarkable contribution to economics by explaining economic horses explicitly. Adam Smith (1723 – 1790) is often regarded as the father of modern political economy.In his life he had written two books, The Theory of Moral Sentiments and An Inquiry into the Nature and Causes of the Wealth of Nations. Moral Sentiments discussed the moral forces that restrain selfishness and bind people together in a workable society; Wealth of Nations assumed the existence of a Just society and showed how the individual is guided and limited by economic forces. (Bruce and Grant, 2007: p. 62) Adam Smith economic ideas are something of a novelty during his time. He introduced the idea of division of labor, which in today's word means specialization.By practicing division of labor, the productivity could be increased as (1) workers' skills are enhanced when they perform only one single task, (2) time for changing work task from one to another is saved, and (3) invention of machines could help increasing productivity once tasks have been simplified and made routine. (Bruce and Grant, 2007). Another i dea being pointed out by Smith is the harmony of interest. When all parties in a economy is seeking their self-interest, the natural order of the oral will eventually channel it to become social good.The key behind this complex mechanism is the concept of competition. Thus, Smith opposed government intervention in the market for the corruption and favoritism will leads to monopoly and competition will fail. This also implies in international trade. Smith thinks that have an advantage in and trades it with other countries. Although Smith is against government involvement in the economy, he did suggest a few roles that government could play in the economy. (Refer to appendix 2) When talk about value, Smith is of he opinion that measurement of value should be labor.The value of any commodity to a person, who possesses it, if he wishes to exchange it for other commodities, is equal to the quantity of labor which it enables him to purchase or command. Labor, therefore, is the real measur e of the exchangeable value of all commodities. (Bruce and Grant, 2007:p. 72) However, Smith did noticed that there are practical and theoretical difficulties in this theory. (Refer appendix 3 for further details) Thomas Malthusian (1766 – 1834) advanced the population theory in his publication An Essay on the Principle of Population.He states that population will increases at a geometric rate when unchecked while subsistence would only increases at best arithmetic rate. He suggested 2 types of checks, first is preventive checks which are those that reduce the birth rate and second, positive checks which are those that increase the death rate, to control population growth. Part of Malthusian ideas were adopted when the Poor Law Amendment of 1834 was passed. In his later work Principles of Political Economy, Malthusian came out with the theory of market gluts. He suggested that insufficient demand would occur due to inequality of distribution of income.Due to that, spending by landlords is important to prevent a glut of goods on the market which would turn into economic stagnation. (Bruce and Grant, 2007) David Richard (1772 – 1823) is a influential figure in the field of economics. He is hailed as the economists' economist for his extraordinary contributions in economics. The man who only had 14 years of formal education addressed economic matters academically. One of his main thoughts is the theory of free trade and from here derived the law of comparative costs, also known as law of comparative advantage.He explained that a person or country should produce goods which they can produce t a lower opportunity cost as compared to their competitors. In doing so, they would be more efficient and when traded with another country that practices the same theory, would achieve mutual benefit. Taking Turbot's concept of diminishing returns in agriculture, Richard used it to develop his theory of rent and introduced the law of diminishing returns. The law says that as the number of factor of production I. E. Labor increases, assuming sisters Paramus, the marginal product will at some point diminish.In the discussion of value, Richard said that a commodity must have use alee if it is to have exchange value. The use value of a commodity is derived from their scarcity and also the quantity of labor requires in obtaining it. Although utility is vital, it is not a measurement of exchange value. Time needed for producing the good and obtaining the raw material to produce the good is the exchange value for a commodity, according to Richard. The minimization of a person's pleasure, advanced the principle of utility.This notion is that people pursue things that provide pleasure and avoid things that produce pain; all individuals seek to maximize their total pleasure. Bruce and Grant, 2007:p. 122) Unlike hedonism, Beneath added the ethical doctrine into utilitarianism that human action should direct to the greatest happiness of the greatest nu mber of people. For that reason, Beneath was very active in social reforms. He supported free education for all, right for women, abolition of slavery and death penalty and many more. The major problem with Bantam's utility theory was that pleasure, a kind of emotion could not be quantify or measure.He tried to measure it using the Felicia Calculus, but he himself acknowledged the flaws in his calculation. John Stuart Mill who attended home schooling had his father, James Mill as his teacher. As a result, he got influenced by Bantam's thoughts of utilitarianism, as his father is a close friend to Jeremy Beneath. He further enhanced the utilitarianism concept, stating that enjoyment ought to be viewed in terms of not only quantity but also quality. (Anagram, 2012) His publication, Principles of Political Economy summarizes and fused all the economic knowledge up to his day.His discussed various issues from production to international trade. His most important and original contributio n is the law of international values. He implied the elasticity of demand for goods in his theory and successfully showed that the real exchange price takes into account not only the domestic costs, but also the elasticity of demand for each product abroad. Comparisons of Ideas between the Five Economists After reading the main thoughts of the five economists, we can see the evolution of economic thoughts in the timeline.The masters each have their own explanation on various topics, sometimes agreeing with each other and other times which they argued. From a bigger picture, we can depict that the ideas during the early period of lassie period varies from ideas of those in the end of classical period. For example, Adam Smith proposed laissez-fairer with minimal government involvement as the invisible hand in the market would eventually move the market to its equilibrium stage. However, Jeremy Beneath, who holds the idea of the greatest happiness for the largest number of people, thin ks that government should overlook the economy and social policy.In international trade issue, Adam Smith explained that export could remove surpluses in market but it could be done only when a country has absolute advantage in producing the particular goods. It was Richard then who argued that country could still benefit from trade even without absolute advantage. He introduced the theory of comparative costs, which is a situation when a country could produce certain goods with relative lower opportunity cost than the other country, and trades between them would still benefit each other.Mill supported Orchard's view of international trade, and further elaborated it by the law of international values. Mill said that the international price of trade is determined by the elasticity of demand of the product. Mill's theory is important as it overcome the economy. On the topic of value, Adam Smith placed his concern in value of exchange. He explained that the measurement of value should be labor and in exchanging commodities, both commodities should have equal quantity of labor to obtain it. As for Richard, he defined exchange value must have use value.The use value of a good is derived from its scarcity and also numbers of labor needed to obtain it. Richard then argued that exchange value of a good rely not only on the time used by labor to produce it, but also the time taken to obtain raw materials and capital goods which s used in the production process. In examining Thomas Malthusian ideas, the work of a very controversial man during his time, we could see that his works are favored by the wealthy landlords and on the other hand, pushed the lower classes – the poor people – into a deeper pit.In his population theory, he states that â€Å"population when unchecked increases geometrically, while subsistence increases at best arithmetically'. Therefore, to control the population growth there is preventive checks and positive checks. Richard, who is a close friend to Malthusian, argued that the theory s untrue and as a matter of fact, as years go by, the increment of food production is higher than increment of population growth. Contributions of the Classical School in Contemporary It is undeniable that the ideas of classical economists are a breakthrough in the mercantilism period and set forth the foundation of modern economic studies.Their works, being influenced by the scientific revolution, seeks experimental evidence to support and verify their ideas thus increase the credibility of their works. Below are three economists that made lasting contributions to the economic until today: 1 . Credited with the title father of modern political economy, Adam Smith indeed had made a huge impact in transformation of economy from mercantilism to free market. The most valuable idea that he leave for us would be the harmony of interest.The key behind the mechanism that brought all self-interest seeking behavior to become a social good, commonly also known as the invisible hand, is the concept of competition. It is because of competition that producers are restrained from making extra profit and hence drives down the price of goods. This theory is still recognized n today's economy. 2. David Richard Richard made a significant contribution with his theory of comparative advantage that served as a cornerstone in today's international trading policies.Although it was later refined by John Mill, nevertheless credits should still be given to this man. 3. Thomas Malthusian Despite being a controversial figure and his theories favor the upper class of the society, Thomas Malthusian still made some contributions to the contemporary economy. It was through his notions that the population growth issue is being concerned and later developed to be a formal study. It was his work regarding market gluts that later catches Keynes attention and expanded it. The classical school of thoughts indeed is an essential period in the his tory of the economical behavior of the society.

negative impact of drugs - 1264 Words

Negative effects and impact of drugs on a user and their family Negative effects and impact of drugs on a user and their family Drugs, such as heroin, cocaine, and prescription pain relievers encompass negative effects on users and his or her family members physically and mentally, however there are various treatment options for the drug or drugs abused. In 2003, 7.1% of Americans aged 12 or older were classified as current substance abusers. Statistically significant increases in the use of heroin, marijuana, cocaine, and pain relievers were reported from 2000 to 2001 (Substance Abuse and Mental Health Services Administration [SAMHSA], 2002). Various drugs have a much greater effect than other drugs may have. Drugs†¦show more content†¦Service delivery continues typically to focus on the individual drug abuse (Copello and Orford, 2002). Because families with cocaine-addicted members display a higher risk of dysfunction, future interventions should take place in the youth’s family and peer environment (Dawes et al., 2000). Drugs such as Codeine, Oxycontin, and Hydrocodone, are prescription medications prescribed by a doctor who may unintentionally cause serious side effects if medications are used long term or chronically abused. Various negative effects of long term use or abuse may include physical and mental dependency, respiratory depression that may lead to death if too large of a dose is ingested, and withdrawal symptoms very similar to that of heroin and morphine. â€Å"Would you believe that prescription medication abuse is the fastest growing drug problem in the United States? Prescription medications are now second only to marijuana as the gateway of drugs first abused. 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U.s. Health Care System Essay - 1600 Words

1. What is the real and perceived performance of the U.S. health care system? Are the views different among patients, providers, payers, and policy makers? Why or why not? According to Kovner and Knickman (2011), acutely ill patients within the country may hold a positive view of the country’s healthcare system, as the U.S. is scientifically and technology advanced in treating life-threatening injuries and illnesses. Overall quality of healthcare performance, however, is lacking (Kovner Knickman, 2011, p. 19). As a whole, the public’s perception reflects this. According to a 2013 Gallup poll, about one in five individuals believe that the U.S. healthcare system is in a crisis, however, individuals are generally content with the healthcare they personally receive (Newport, 2013). The Commonwealth Fund is a private foundation, with the goal of encouraging health care systems that produce quality outcomes, greater access, and greater efficiency to the public. 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