Inertia lab report Essay Example for Free

Inertia lab report Essay A Rotational motion experiment is the simplest method of finding the Moment of Inertia. Minimum equipment is required to perform this experiment. For the purposes of increasing the accuracy of the results, the procedure should be repeated three times, making our conclusion more reliable. While load is moving downwards it’s potential energy converts to kinetic. Load is accelerating because weight(Fg=mg) of the load is bigger than tension on a string so load is not in equilibrium and by Newton’s Second Law (F=ma) resultant force creates an acceleration. Resultant force can be calculated by the equation S=0. 5at2+ut to find acceleration and F=ma. String rotates the spindle which rotates the disc by creating a torque(T=Fr). Torque accelerates the disc and it can be found by ? = . To find moment of inertia now T=I? equation is used. 1 Method and observation: Apparatus: 3 different size discs, spindle, ruler, set of weights, stopwatch, stand. Disc is attached to one end of the spindle and string with load is attached to the other end. Disc’s weight, diameter and radius are required to be measured before experiment. Length of the string (L), number of loops on the spindle (n) and horizontal distance of loops (H) were measured before experiment. Using equation below r is found. = 2 Spindle Disc String Stopwatch Weights Stand After setting all the equipment up the experiment starts. The string is then wrapped around the spindle. Time was measured for load pass the distance of length of the string. To plot graph one over time2 is required to be calculated. 4 different masses of the load are used in experiment is repeated 3 times every time mass is changed to make reduce random error. After finishing all the experiments on one of the discs other disc is placed and experiment repeats. When all the experiments are done and measurements are recorded mass against one over time2 is plotted using results. 3 graphs are going to be plotted for each disc. Gradient of the graph is constant k which we could use to find I using formulae below. When observed the string with vibrating and load was moving a little which can cause some systematic error. While spindle is spinning there is some friction which is neglected and the disc is vibrating while it is spinning which also cause some systematic error. = ? 2 2 Results MEASUREMENTS ON THE SPINDLE: MEASUREMENTS ON THE DISCS n= 8 L= 0. 26m DISC 1 (small) DISC 2 (medium) DISC 3 (large) Weight (kg) 0. 314 0. 490 Diameter (m) Radius (m) 0. 1 0. 127 0. 05 0. 0635 0. 696 0. 152 0. 076 H= 0. 026m r= 5. 1410-3 DISC 1 Weight (kg) Time (s) Average Time (s) 1/t? (s-2) K (m s? ) I (kg m2) experimental I (kg m2) theoretical ?I (kg m2) 0. 1 2. 93 | 2. 73 | 2. 62 2. 76 0. 131 0. 15 2 | 2. 1 | 2. 23 2. 11 0. 225 1. 439 0. 000346 0. 2 1. 87 | 1. 85 | 1. 86 1. 86 0. 287 0. 22 1. 81 | 1. 74 | 1. 78 1. 78 0. 317 0. 000393 0. 000047 DISC 2 Weight (kg) Time (s) Average Time (s) 1/t? (s-2) K (m s? ) I (kg m2) experimental I (kg m2) theoretical ?I (kg m2) 0. 1 6. 49 | 6. 16 | 6. 33 6. 33 0. 0250 0. 15 4. 97 | 4. 77 | 509 4. 92 0. 0413 0. 686 0. 000726 0. 000988 0. 000262 3 0. 17 4. 38 | 4. 97 Z 4. 43 4. 43 0. 0510 0. 20 4. 00 | 4. 13 | 4. 08 4. 07 0. 0604 DISC 3 Weight (kg) Time (s) Average Time (s) 1/t? (s-2) K (m s? ) I (kg m2) experimental I (kg m2) theoretical ?I (kg m2) 0. 1 4. 21 | 4. 13 | 4. 17 4. 17 0. 0575 0. 15 3. 13 | 3. 27 | 3. 00 3. 13 0. 102 0. 290 0. 00172 0. 00201 0. 00029 4 0. 2 2. 73 | 2. 75| 2. 73 2. 74 0. 113 0. 17 3. 03 | 2. 77 | 2. 83 2. 9 0. 119 Calculations T=I? -3 T=Fr I = = = = ? = 2 1 = ? 1 =km k = 2 2 9. 8x(5. 1410? 3 )? I1e= 21. 4390. 26 =0. 000346ms? 9. 8x(5. 1410? 3 )? I2e= 20. 6860. 26 =0. 000726ms? 9. 8x(5. 1410? 3 )? I3e= 20. 2900. 26 =0. 00172 ms? I1t=0. 50. 0520. 314=0. 000393 ms? I2t=0. 50. 063520. 490=0. 000988 ms? I3t=0. 50. 076020. 696=0. 00201 ms? ?I1=|0. 000393-0. 000346|=0. 000047 ms? ?I2=|0. 000988-0. 000726|=0. 000262 ms? ?I3=|0. 00201-0. 00172|=0. 000290 ms? 5 Error Analysis = 2 1(2 +2 ) + 2( + ) + = =? r= 0. 0005+0. 0005 ?r= 0. 26+0. 026 r x5. 1410-3=1. 7910-5 ?s=0. 00192 ?k=0. 176 ?I=1. 7910-50. 001920. 176=6. 0510-9 6 Graphical representation Disc 1. 1/s? 0. 35 0. 3 y = 1. 439x 0. 25 0. 2 0. 15 0. 1 0. 05 1/t? 0 0 0. 05 0. 1 0. 15 0. 2 0. 25 Weight kg 1/s? 0. 16 Disc 2. 0. 14 y = 0. 686x 0. 12 0. 1 0. 08 0. 06 1/t? 0. 04 0. 02 0 0 0. 05 0. 1 Weight 0. 15 0. 2 0. 25 kg 7 Disc 3. 1/s? 0. 07 0. 06 y = 0. 290x 0. 05 0. 04 0. 03 1/t? 0. 02 0. 01 0 0 0. 05 0. 1 Weight 0. 15 0. 2 0. 25 kg 8 Discussion From the results gained it can be concluded that larger and heavier the disc is greater the moment of inertia of a body. As we can see the gradient on the graphs are larger at larger discs. From theoretical values which it can be concluded that experiment was right. More time is taken to pass that distance for larger discs because the moment of inertia is bigger so it torque is required to accelerate the disc. However there were some random and systematic errors. One of the most effecting random errors is the human reaction error. It could be decreased by using light gate instead of stop watch. Using more accurate equipment for taking measurements of discs and spindle would decrease the error. Masses of the loads are not exact so more accurate loads would decrease the error. Conclusion Larger and heavier discs have larger moment of inertia so they require more torque to be accelerated.

Educational Goals and Philosophy :: Education Teaching Teachers Essays

Educational Goals and Philosophy It was not until middle school that I began distinguishing those of my teachers who motivated and inspired me from those who simply went through the motions of teaching. It was also about that same time that I began envisioning myself as an educator -- one who not only impressed his students with the mastery of content but also impressed upon his students the need to perform at the highest academic level possible. When you really think about it, an education is simply an instrument with as many uses that an individual can come across; however, it is also something that is taken for granted by so many. Educating our youth and society is essential to the survival of the human race, and making sure that all children not only receive a full, well-rounded education but also take nothing for granted is a serious challenge for today's educator. I possess that inner desire to make a difference; I hold myself in that light hoping to inspire and motivate generations of students to come. T o accomplish this dream, though, I will need much more than sheer desire and determination. In fact, any hopeful educator must subscribe to philosophies and strategies ranging from teaching styles to discipline, from motivational techniques to leadership. In the following text, I will attempt to touch on all of these issues and also spend some time discussing such topics as educational reform and mainstreaming in the classroom. First, I should focus on what philosophies I will adhere to as an educator. At best, I can describe my philosophy as a combination of the well-established, almost timeless philosophies of idealism and realism. The idealist in me views discipline the same as do other idealists. Handling student misbehavior and misconduct is a personal issue that I will handle with the student privately. Only after several of these attempts fail or the misconduct is so severe will I involve a third party such as parents or administrators. Another similarity I have with the idealist point of view is their passion for teaching. It's an almost indescribable feeling, but I just cannot wait to have my own classroom. Looking at things from a different point of view, I identify very much with the realist philosophy in terms of the sharing and gaining of knowledge.

How Did the Nuremberg Trials Work and Who Was Tried and Why? Essay

The war crime trials held at Nuremberg are one of the most well-known trials against humanity in history. These trials were very complex and consisted of many people from many different countries. Justice was a big part of these trials and justice was served to the people who were tried and convicted throughout this complex process. The specific name for these trials was the International Military Tribunal, often referred to as IMT (Taylor Intro). These were complex trials which sought to break new legal ground on major issues of international law (Taylor 4). Simply, the Nuremberg trials were created to convict the people who were involved in the Holocaust and the destruction of Poland as well as other events. The events of the Nazi era were a major part of the Nuremberg trials (Taylor 3). These trials were much more intricate than the average person would think. It changed the lives of many, many people; not only were the families of those convicted but of the people who sat in on the hearings were affected. Everyone who was remotely involved in these trials was affected by them. But what law was the International Military Tribunal enforcing? Ordinary courts and trials are based on the statuses of sovereign nations. However, the IMT was no ordinary court. It was established by the United States and three other major European Nations, and the laws by which the IMT was bound were not the laws of those or of any other nations. For its rules on crime the IMT looked primarily to the international â€Å"laws of war,† violations were called â€Å"war crimes† (Taylor 5). Humanitarianism played a large role in the development of the laws for Nuremberg (Taylor 5). The laws by which the tribunal would follow were not chosen over a day’s time but, they were well thought out, reviewed and reviewed again. This was necessary for the simple reason that there would be no way for the accused to beat the system because something in the wording was wrong. One of the most famous trials from Nuremberg was that of Goering; Hermann Goering. Goering was commander in chief of the air force, president of the Reichstag, and prime minister of Russia. He was found guilty for crimes against peace, war crimes, and crimes against humanity (Goldensohn 101). It took much more than just taking a look at what Goering did during his time of doing these disastrous things, they looked at his parents, his childhood; they took a look at his personal issues. They went deep enough even to look at his past wives (Goldensohn 101). Unlike most people convicted throughout the trials; Goering was willing to accept that he actually did these things. He admitted his wrong doings (Goldensohn 102). Usually the convicted would try to fight the system. Goering was a smart man and knew it was easier to accept these things because he knew he did them. Goering was willing to say he was Hitler’s successor; he worked face-to-face with Hitler (Goldensohn 102). That right there could have been enough for the penalty of death. Goering believed that his childhood has no major effect on his adult personality, but that his childhood qualities were the same he acquired now; he didn’t change much. Goering’s trial ended in him being sentenced to death by hanging. Two hours before this scheduled execution, on October 15, 1946 he committed suicide in his cell (Goldensohn 101). Goering’s case was one of the more complex and more interesting cases. He understood what was going on and didn’t fear for his life because he knew all of the things he did were wrong. Walther Funk was minister of economics from 1937 to 1945 (Goldensohn 76). He was tried at Nuremberg. Unlike Goering, Funk feared for his life and would become defensive and teary-eyed when asked about his political activity. He claimed he was only a small part of the things that happened and had no idea what was going on (Goldensohn 76). Funk did not lead the destructive life-style that Goering did but what he did in his adult years was enough to get him into these trials and be convicted. In 1931 he retired from the editorship of the paper, â€Å"because I felt that the National Socialists were certain to assume power and I was drawn to the movement. Germany was in a crisis. Unemployment was great. Class struggles existed (Goldensohn 77). Funk was never part of the inner circle of Hitler, He was not a politician (he only headed the office for Private business for a few months) (Goldensohn 79). Then average person today in 2011 would think that all the people tried in Nuremberg hated the Jews and were anti-Semitic. Funk was actually a friend with many Jewish people, he worked with Jews; he did not hate them (Goldensohn 80). At Nuremberg they accused Funk for the rearmament of Germany. Funk claims that it was false and it was in the hands of Georg Thomas (Goldensohn 81). In the end, on October 1st, 1946; Funk was sentenced to life in prison. He was released in 1957 for health problems and later died in 1960. The Nuremberg trials were different and more complex than most trials. They were held to serve justice. In the end justice was served. The International Military Tribunal was successful in what they wanted to accomplish in the first place. These trials are not fully understood by many especially in the laws that they followed and how the trials were run. Having multiple nations involved and defendants from many nations; it became hard through translation and things like that. The Nuremberg trials broke the legal ground internationally that it sought to break. Jacklyn Oleksak 3/23/11 Works Cited Pd. 2 Dodd, Christopher J. Letters from Nuremberg. New York: Crown Publishing, 2007. Print. This book did not help me as much as I thought it would. Titled â€Å"Letters from Nuremberg† it sounded like it would help. After reading various pages I noticed it was more of a novel of enjoyment rather than a useful resource. It was a fairly easy resource to understand and the authors credentials were very good but I only used a line of two from the whole book. I got it at the Plainedge Public Library with two other books about the trials. Goldensohn, Leon. The Nuremberg Interviews. New York: Alfred A Knopf, 2004. Print. Goldensohn has the best credentials of all. He was the one interviewing the defendants in his book. Therefore, all his information was accurate. The books reliability was very high because it had so much information and by checking other sources, it was all correct. It was written a bit above an easy reading level but I was able to understand it fairly well and get the information I needed. I accessed it at the Public library while looking through books for my research. Gormley, Larry. â€Å"Hermann W. Gà ¶ring.† Ehistory archives. 2001. OSU department of history. 17 March 2011. . This website was fairly helpful. I didn’t use it as a primary source but rather as a source to check information. It was helpful in the part of my essay about Goering. It gave me a good oversight of what that paragraph would be about and then I got the more complex details in the Nuremberg Interviews book. I accessed it through advanced search on google. Linder, Doug. â€Å"The Subsequent Nuremberg Trials: An Overview.† World famous trials. 2000. Nuremberg trials. 15 March 2011. This like the Ehistory archives website gave me a great overview of what my paper was going to be about. It was very useful in helping me find out what was important for my paper and what was not as important. It helped my research become more detailed and it made it a better paper all together. I accessed it in the PHS library from searching on advances search Google. Taylor, Ella. â€Å"Crimes against humanity.† The Village Voice. 29 September- 5 October 2011. ProQuest. PHS library. 22 March 2011. http://proquest.umi.com This website did not help me at all. It was not as to the point as the other resources I used. It was vague and unhelpful. It did have some correct information and it was a knowledgeable source but it was not what I needed to write my paper. I accessed it through the PHS databases. Taylor, Telford. The anatomy of the Nuremberg trials. New York: Alfred A Knopf, 1992. Print This was my most valuable source. It gave me much more than I needed and gave me a variety of information to choose from. It was not an easy reading level to read at. It was most likely written for well-educated adults but I was able to decipher the information I needed for my research. The information is accurate, I checked through other sources. This was my most helpful guide throughout the research. I accessed it at the Public library.

Diabetes Is A Major Global Health Crisis - 943 Words

Diabetes Type 2 diabetes is emerging as a serious health challenge and has become a major global health crisis. This is especially true in the case of developing countries like India, where a combination of rapid urbanization, increasing sedentary lifestyles and a switch in nutrition has made it the centre of this epidemic. In 2000, India (31.7 million) topped the world with the highest number of people with diabetes mellitus. According to Wild et al.3 the prevalence of diabetes is predicted to double globally from 171 million in 2000 to 366 million in 2030 with a maximum increase in India. With stakes so high, India faces an uncertain future in regards to the burden of the disease. With identification of factors controlling diabetes and with adequate research into preventative care there may be some hope. Diabetes Mellitus is a disease where there is an increased amount of sugar in the blood than normal. By far, the most common form of diabetes is type 2 diabetes, accounting for 95% of diabetes cases in adults. Some 26 million American adults have been diagnosed with the disease. Type 2 Diabetes in particular is a largely ‘lifestyle disease’ that is strongly associated with high blood pressure, high cholesterol and weight gain, particularly around the waist. Type 2 diabetes may be prevented in most cases, but it cannot be cured. Significance The significance of rising levels of diabetes in India is related to the increasing burden of disease. India is considered theShow MoreRelatedBackground and Methodology of the Research Process to Problems in Health Care1003 Words   |  5 PagesProcess to Problems in Health Care Childhood Obesity HCS/465 August 2, 2012 Donald Steacy Introduction The purpose of the paper is to show how to develop and understand methodology of the research process when pertaining to health care. The process consists of retrieving a peer-reviewed article and applying the research methodology to the article selected. The article selected for the research methodology was Childhood Obesity: A Global Public Health Crisis written by Sameera KarnikRead MoreObesity Is A Threat For Global Health1724 Words   |  7 PagesIntroduction: Obesity is a major disease which has become a global problem, there are more than 250 million people have body mass index more 30. Obesity is being major concern of the people as it leads to stroke and heart attack. This figure is being spread worldwide thus this has become of the major concerned for world health. The prevalence of the concerned disease is high in number around the world. This disease has become concern of both developing and developed countries which has raised theRead MoreChildhood Obesity : A Serious Medical Condition That Affects Children And Adolescents Essay1116 Words   |  5 Pageswho are obese in New Zealand. Through survey, The 2012/13 New Zealand Health Survey found that 1 in 9 children aged 2–14 years were obese (11%), in New Zealand (Ministry of Health, 2014). Childhood obesity arises because of the differences in health and lifestyle outcomes among different cultural people in New Zealand. The major causes which contribute are socio-economic in equality, access to and quality of health care, and health risk factors (Statistics New Zealand, n.d). The environments with lowerRead MoreThe Local Role of Nurses in International Health Policy691 Words   |  3 PagesThe Local Role of Nurses in International Health Policy The global obesity epidemic has been recognized as a significant health threat to developed nations by the World Health Organization (WHO, 2013). Globally the number of obese individuals, over 1.4 billion adults, has doubled since 1980. This represented 11% of all adults aged 20 and over in 2008. Another 35% of this age group was considered overweight. Even more troubling is the increasing number of children who were considered overweight inRead MoreCause and Effect of Chronic Disease and Its Impact in the United States1186 Words   |  5 Pagesquality of life lost, we are also a nation in crisis, an economic crisis. We spend over $2 trillion a year, about 16 percent of our gross domestic product on health care. 75 cents of every health care dollar we spend is on treatment of chronic disease, most of which is preventable. If we do not reverse this trend, chronic disease will continue to devastate Americans’ health, lead to millions more preventable deaths and will ultimately bankrupt our health care system. Page 3 The number one causeRead MoreMedical Care Access, Diagnostic Evaluation898 Words   |  4 Pageswill develop a mental illness at some point during their lifetime (CDC; APA). Major Depressive disorder is a leading cause of disability for ages 15-44. Major depressive disorder affects approximately 14.8 million American adults or 6.7 percent of the U.S. population age 18 and older in a given year† while anxiety affects †¦40 million†¦adults ages 18 and older†¦Ã¢â‚¬  (NIMH; APA). Comparatively, cardiovascular, diabetes, epilepsy, obesity, cancer, and asthma, and other chronic diseases are surfacingRead MoreStatistical Data Reveal That 25% Of Adult Americans Have917 Words   |  4 Pagesdevelop a mental illness at some point during their lifetime (CDC; APA). Major Depressive disorder is a leading cause of disability for ages 15-44. Major depressive disorder affects approximately 14.8 million American adults, or 6.7 percent of the U.S. population age 18 and ol der in a given year† while anxiety disorder affects †¦40 million†¦adults ages 18 and older†¦Ã¢â‚¬  (NIMH; APA). Comparatively, cardiovascular, diabetes, epilepsy, obesity, cancer, and asthma, and other chronic diseases are surfacingRead MoreThe Population Of Interest Used By Charles Georges County Maryland1669 Words   |  7 Pagespopulation of interest used will include African American Males and Females ages 18 and above. This project is about organizing a health fair in Prince Georges County in which the selected population was educated about health care outcomes for high blood pressure; diabetes and obesity. Majority of the populace who attended the fair were either low income residents or uninsured. Diabetes, obesity and high blood pressure is known to have increased risk of stroke and heart disease (Sowers, Epstein, FrohlichRead MoreKin 1600 Wellness Paper1355 Words   |  6 Pagesstatistics prove that humans domestically and globally are struggling to get a full night of rest. Sleep deprivation is a common problem among many Americans. Obtaining an adequate amount of sleep per night is a very important aspect of mental health. Approximately 70 million Americans are affected by some kind of sleeping problem. This figure constitutes those that may have a sleeping disorder such as insomnia or just not getting to bed on a good time. A poll conducted by the National SleepRead MoreDiabetic Patients Should Be Educated About Diagnosis Of The Disease ( Powers )1730 Words   |  7 Pageswith diabetes type two are psychological concerns, behavior change strategies (e.g., self-directed goal setting), taking medications, purchasing food, planning meals, identifying portion sizes, physical activity, and checking blood glucose (ADA, 2016). â€Å"Individuals requiring insulin should receive additional education so that the insulin regimen can be cording with patient’s eating pattern and physical activity† (Franz, Boucher, Evert, 2014). Multiple studie s provide evidence that diabetes nutrition