Physics investigation- stopping distance Essays

Physics investigation- stopping distance Essays Physics investigation- stopping distance Paper Physics investigation- stopping distance Paper Introduction In my investigation I intend to gather enough evidence and explanation to see if and how the mass of a ball will affect its stopping distance. I will carry out a series of tests starting with changing the mass of the ball then changing height which its dropped from. Predictions I predict that the mass of a ball will most defiantly affect the distance it takes to stop because as the mass increases, the amount of friction with the surface will increase which will slow down the ball sooner. I believe if the mass of the ball is doubled the friction with the surface its on will double and therefore half the distance taken to stop. Equipment For my investigation the equipment I will require is: * A ramp and stand ( 1 metre long) * Carpet (2 by 0. 5 metres) * 2 balls of different masses but same size ( ball 1, 2. 8g and ball 2, 44. 9g) * 2 metre rules My setup My setup is pretty simple I will use a ramp with a rule along it and some carpet for the balls to roll along I will then use another rule to measure the distance taken to stop. When I first set up my equipment the balls where rolling around everywhere, to overcome this problem I decided to curl the carpet into a half bowl shape the balls then rolled smoothly down the ramp and along the carpet. Procedure Firstly I will drop the lighter ball 1, and measure its stopping distance and record this result; I will then drop the same ball another 4 times and record those results. I will average the 5 repeated results in order to gain a fair distance for the stopping distance of each ball. I will then repeat this with ball 2 and accumulate an average. All other variables for now will be kept the same (i.e. gradient of ramp, height dropped from) Test 1 In my first test I will be testing ball 1 of radius 2 cm and mass of 2. 8g, against ball 2 of radius 2 cm and mass of 44. 9g. I will be dropping the ball from 30cm up the ramp with gradient of 24. 4i , my results are: Ball 1 (cm) Ball 2 (cm) 1 115 83 2 99 84 3 108 84 4 114 87 5 112 88 Average 109. 6 85. 2 Analysis My first test supports my prediction that the mass of a ball does affect the distance that it takes to stop, although ball 2 is over 16 times heavier so I would have expected the stopping distance to be shorter. Test 2. Again I will use ball 1 and ball 2 but this time I will drop them from a height of 40cm up the ramp with gradient 24. 4i , my results are: Ball 1(cm) Ball 2(cm) 1 137 94 2 122 100 3 130 98 4 123 101 5 121 102 Average 126. 6 99 Analysis As I expected when the dropping height was increased the relationship is the same just the distances are longer, I soon realised a fatly floor in my experiment the 2 balls were made out of 2 different materials so the coefficient of friction between the 2 balls and the surface would be different for each ball making my investigation unfair and inaccurate. I decided to use a toy car and change the mass of the car by adding weights to it, this will mean that the coefficient of friction will be the same for all my tests. New equipment   toy car weights   blue tac (to attach weights to car) Test 3 Here I will be using the toy car of mass 17. 4g, and I will add 17. 4g so the cars mass will have doubled and I will further use the car plus 100g to see how this affects the stopping distance, my results are. Car no added mass (cm) Car plus Analysis From these results it is clear that my prediction is only partially correct as the mass of an object does affect its stopping distance but the relationship is not as linearly as I expected, as the mass is doubled the stopping distance is not halved this is due to the momentum that the object gains, when more mass is added the object gains more momentum proven with the momentum formulae momentum = mass velocity, so the object will travel feather with more mass, this will explain why when the mass of my car had an extra 100g it travelled a further 77. 2 cm. Although its not that simple because we have to take into account friction, as the mass increases the gravitational pull of the earth will increase which in turn increases the amount of friction between the car wheels and the surface they roll on and a greater friction will slow down the car and reduce its stopping distance, this will explain why when I added only 17. 4g the stopping distance was less . In theory there should be a certain mass that when added to an object the stopping distance will not change as the amount of extra momentum it gains will be cancelled out with the increased friction. I will extend my investigation to try and work out this quantity of mass. Test 4 Here I will again be using a toy car and I will change the mass using weights from 20g up to 90g, dropping the car from a height of 10cm and gradien Distance taken to stop (cm) Analysis. Analysing my results soon after the test I noticed a pattern within my results, although at mass 80g this was not true I decided to repeat the 80g run and found that the distance was actual higher and fit in with my other results. Total mass of car (g) Plotting a graph of my results shows the trend more clearly. As you can see from 20g 40g the stopping distance of the car decreases this is where the extra mass produces more friction than momentum, after this from 40g 90g the stopping distance increases where the momentum is now greater than the friction, due to time restrictions I will only be able to make an estimate of the extra mass needed for friction and momentum to balance I will base my estimate on the results collected and my graph, the turning point is in between 40g and 50g so I will extrapolate from these to points in order to make my estimate. Conclusion In my experiment I aimed to find out whether or not the mass of a ball affects its stopping distance and if so how does it. I started out thinking I knew what was going to happened and that friction was the only point to consider, after my second test I knew something wasnt right and decided to use the toy car, using the toy car was a massive benefit as I could change the mass so much easier and all other variables where kept the same (e. g. coefficient of friction). It was my first set of results with the toy car when I realised I had to take into account momentum this then explained everything about my previous results and everything fell into place. Feathering my investigation out of pure interest I decided to work out the balancing mass of friction and momentum but due to time restrictions I am only able to make an estimate of 42g due to extrapolating my graph. I enjoyed my physics investigation and wish I had more time to further it more.

Banana as a Natural Superdisintegrant

Banana as a Natural Superdisintegrant The objective of the study was to evaluate banana powder as a superdisintegrant for the formulation of oral disintegrating tablets and to compare the results with commonly used superdisintegrants like croscarmellose sodium, pre gelatinised starch and sodium starch glycolate. Oral disintegrating tablets containing Domperidone as the model drug were formulated using five different concentrations of each superdisintegrant (2%, 4%, 6%, 8% & 10%) and compressed by direct compression. The formulations were subjected to various evaluation studies such as wetting time, water absorption ratio, disintegration time and in-vitro dissolution. The results showed that the disintegration time and drug release of the formulation containing banana powder (6%) was comparable to other super disintegrants. The IR spectrum analysis demonstrated that banana powder was compatible with the drug. These results suggest that banana powder can be used effectively as a superdisintegrant in orally disintegrating tablet formulations. Banana, is a natural product which is available in plenty, economically affordable and has its own nutritional value. It can be used as a potential additive in the formulation of oro -dispersible tablets. Keyword: orodispersible tablets, superdisintegrants, disintegration time, natural excipients. INTRODUCTION The tablet is the widely used dosage form because of its convenience in terms of self-administration, compactness, and ease in manufacturing. For the past one decade, there has been a demand for more patient-friendly and compliant dosage forms. As a result, the development of new technologies has been increasing annually. Since the cost for development new drug molecule is very high, efforts are now being made by pharmaceutical companies to focus on the development of new drug dosage forms for existing drugs with more safety and efficacy together with reduced dosing frequency, and the production of more cost-effective dosage forms. However, geriatric and p ediatric patients were having difficulty in swallowing conventional tablets, which leads to poor patient compliance. To overcome this problem, scientists have developed innovative drug delivery systems known as â€Å"melt in mouth† or â€Å"mouth dissolve (MD)† or sometimes â€Å"dispersible† tablets. These are novel types of tablets that disintegrate /disperse in saliva. Their characteristic advantages such as administration without water, lead to suitability for the geriatric and pediatric patients. They are also suitable for the bedridden patients, and patients who do not have easy access to water. The advantages, in terms of patient compliance, rapid onset of action, increased bioavailability (in some instances) and comparable stability to conventional tablets make these tablets popular as a dosage form of choice particularly in these populations. Domperidone maleate is a widely used anti-emetic drug, acting by inhibition of the dopaminergic receptor. Domper idone maleate does not cross the blood brain barrier. Domperidone maleate is also effective in gastro paresis, pediatrics gastro esophageal reflux (infant vomiting). Domperidone maleate after oral dosing undergoes extensive gastric and hepatic first pass metabolism resulting in low bioavailability (15%) which therefore, may not minimize the rate of vomiting. In context of the above principles, a strong need was recognized for the development of mouth dissolving tablets of Domperidone maleate to improve its bioavailability for relief on nausea and vomiting. In mouth dissolving tablets, disintegrants plays a major role. A  disintegrant  is a substance in a tablet formulation that enables the tablet to break up into smaller fragments upon contact with gastrointestinal fluids. Such a rapid rupture of the tablet matrix increases the surface area of the tablet particles, thereby increasing the rate of absorption of the active ingredient and decreasing the onset of time to therapeutic effect. A new disintegrant class has emerged during the recent past known as the Superdisintegrant. Superdisintegrants improve disintegrant efficiency resulting in decreased use levels, typically 1-10% by weight relative to total weight of tablet when compared to traditional disintegrants.

An Empirical study of determinants of capital structure of Essay - 1

An Empirical study of determinants of capital structure of non-financial companies in Egypt before and after the financial crisis - Essay Example The current financial crisis therefore has significantly affected the financial institutions of the world along with other non-financial institutions also. Due to this reason, the overall extension of credit to the non-financial institutions has been affected over the period of time. It is however, important to note that international banks specially working in developing countries have relatively limited contacts or business relationships with the international banks therefore they have not been affected the way international banks have been. In countries like China where the financial sector is mostly under the control of government, banks exposure towards toxic debt is limited therefore despite having the international presence, these banks are not fully affected by these changes. It is also however, critical to understand that there is an indirect threat faced by the international banks due to general decline in the stock prices as well as the falling housing market. Since most of the banks do not keep most of their capital in the form of cash therefore declining asset values will force them to allocate more capital to cover the potential risks. In such an environment there are chances that the overall credit extension to private sector may decline and financial institutions may require the support of their governments to keep them solvent. Theory also suggests that a reduction in the bank credit may result into a decline in the investment activity in the country and this will invariably affect the growth and may result into the creation of unemployment within a country. Since most of the emerging countries such as China, India, Korea and Japan are depending on exports as their major economic variable for growth therefore the current financial crisis may result into the substantial decline in the export business and thus may

Investigation into Virtual Organisation facilities Coursework

Investigation into Virtual Organisation facilities - Coursework Example Growing complexity in the business environment makes "business as usual" ineffective. (Keen, 1991) Globalization calls for communication and synchronization across diverse time zones and locations. Time constraints require reduction in reaction time, driving businesses to just-in-time inventory, orders, scheduling, payments, manufacturing, distribution, etc. Change has become the norm, an unpredictable basic reality. The fresh economic cutting edge is the knowledge economy, and right now about 97% of all employment expansion is coming from knowledge work. Wealth today is generated principally by the value people add through new ideas. (Moyer, 1994) What members of these workgroups do is called collaborative work and they must often overcome barriers of time zones and geography to document what has been accomplished. (Stuck, 1995) To stay aggressive in today's business atmosphere requires new levels of collaboration and dexterity, both within and between organizations. Communications networks and IT are the tools that make possible this "working together apart," and telecommuting (or home working) is making workgroups more productive. (Stuck, 1995) IT plays a fundamental role in supporting critical activities, enabling organizations to make efficient and effective changes in the manner in which work is performed (Turban, 1996) and offering real potential for changing the way in which people work (Daniels, 1995). For example, the Internet provides a way for small businesses to create a virtual organization to complete projects (Blotzer, 1995). Companies are forming worldwide mutual provisions as the basis for developing a competitive advantage from technology (Bailetti, 1993). Coordination of IT management presents a real challenge to these firms which have to deal with detached, decentralized IT practices (DeSanctis, 1994). While decentralization may bring litheness and fast response to changing needs, it also makes systems integration difficult, presents' obstruction to standardization, and acts as a disincentive for achieving economies of scale (DeSanctis, 1994). In juxtaposition with rapid changes in the business environment, the way in which business is conducted is also changing at a rapid pace. Groups, not individuals, have become the fundamental unit of work in modern organizations, with non-routine and new work most often being accomplished through teams, committees, or ad hoc workgroups (Finholt, 1990). Groups and group behavior are momentous for both organizational performance and individual group members. Computer-based technology may affect these groups and their behavior. At least some electronic groups behave

Black Holes Essay -- essays research papers

Black Holes Black holes are objects so dense that not even light can escape their gravity, and since nothing can travel faster than light, nothing can escape from inside a black hole. Loosely speaking, a black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull. Since our best theory of gravity at the moment is Einstein's general theory of relativity, we have to delve into some results of this theory to understand black holes in detail, by thinking about gravity under fairly simple circumstances. Suppose that you are standing on the surface of a planet. You throw a rock straight up into the air. Assuming you don't throw it too hard, it will rise for a while, but eventually the acceleration due to the planet's gravity will make it start to fall down again. If you threw the rock hard enough, though, you could make it escape the planet's gravity entirely. It would keep on rising forever. The speed with which you need to throw the rock in order that it just barely escapes the planet's gravity is called the "escape velocity." As you would expect, the escape velocity depends on the mass of the planet: if the planet is extremely massive, then its gravity is very strong, and the escape velocity is high. A lighter planet would have a smaller escape velocity. The escape velocity also depends on how far you are from the planet's center: the closer you are, the higher the escape velocity . The Earth's escape velocity is 11.2 kilometers per second (about 25,000 M.P.H.), while th e Moon's is only 2.4 kilometers per second (about 5300 M.P.H.). We cannot see it, but radiation is emitted by any matter that gets swallowed by black hole in the form of X-rays. Matter usually orbits a black hole before being swallowed. The matter spins very fast and with other matter forms an accretion disk of rapidly spinning matter. This accretion disk heats up through friction to such high temperatures that it emits X-rays. And also there is some X-ray sources which have all the properties described above. Unfortunately it is impossible to distinguish between a black hole and a neutron star unless we can prove that the mass of the unseen component is too great for a neutron star. Strong evidence was found by Royal Greenwich Observatory astronomers that one of these sources called Cyg X-1 (whic... ...detect this radiation was Joseph Weber. He eventually came up with the first bar gravity-wave detector. This was a long aluminum cylinder, 2m by  ½m, that should be compressed with an incoming gravity wave. To detect this compression he wired piezoelectric crystals, which respond to pressure by generating an electric current, to the outside surface of the bar. Although it didn't work, other bar detectors were built that used a device called a stroboscopic sensor to filter out random vibrations. This was an ingenious device, but it too proved to be a non-contributor in the advancement of learning more of the galaxy. Just as X-ray astronomy went from simple detectors in the noses of rockets to full fledged X-ray telescopes housed in orbiting satellites, and radio astronomy went from crude dishes to continent spanning arrays, gravity wave detectors may show a completely new spectrum. And, just as X-rays brought a completely new universe into focus, one can hardly imagine what a gr avitational view of the universe will reveal. At the very least, we will have definitive proof or denial of black holes, but we may find that black holes are some of the more subtle features of the universe.

Court Observation

Observation of the Court Proceedings in Litigated Cases at District Court Report 20 Submitted to Pubanchal University Chakraworti HaBi College of Law For the Partial Fulfillment as Clinical Works Submitted by Sambal Chaulagain Role No:23 BALLB 1st years Table of Contents 1. Introduction 2. Objectives and Timeframe of Observation 3. Methods and Limitation 4. Observed Findings 1. Lodging the Case 2. Summoning the Respondents 3. Examination of Witness 4. Hearings 5. Role of lawyers 5. Finding and Recommendations . References and Annexes Observation of the Court Proceedings in Litigated Cases at †¦. Court 1. Introduction †¢ give brief introduction of the report itself (Start as This is a report of the court observation of †¦. court during †¦.. . The purpose of the observation was to gain practical knowledge of the performance of the justice agencies in course of litigation lodged within the given jurisdiction of the court†¦. ) †¢ present a summary of the rem aining chapters 2. Objectives and Timeframe of Observation The main objective of the observation was to gain fresh knowledge on the proceedings of the litigated cases in †¦. Court. More specifically, the observation intended to identify the barriers and lackings in the system that hinders or delays the justice process. †¢ The observation was done during†¦Ã¢â‚¬ ¦. (dates) 3. Methods and Limitation †¢ Mention how you observed, how you asked information with whom †¢ Mention what you did not look for in the course of observation 4. Observed Findings 1. Lodging the Case How the complaints or charge sheets are registered †¢ Who observes the document initially †¢ Who give order to register †¢ What is called the name of registry 2. Summoning the Respondents †¢ How the document is presented to the bench †¢ How the initial hearing takes place and how the respondents are summoned †¢ How the rejoinders are registered 3. Examination of Witne ss †¢ How the cases are presented to bench after receipt of rejoinder †¢ What are the basic examination of evidence (witness, documents) 4. Hearings How the hearing takes place awarding judgment †¢ How the lawyers argue and defend in this course †¢ What are the steps of that lawyers pleading is heard by the judge 5. Role of lawyers †¢ What are the role of lawyers you observed in whole cases (What a lawyer does during whole course, mention the major work of lawyers prior to court room proceeding and court room proceedings. 5. Findings and Recommendations †¢ Give a summary what you found in the process †¢ In your opinion were there any other ways to do the process better ? Suggest your idea to bring changes in law †¢ Suggest your idea bring changes in behavior of the officials 6. References and Annexes †¢ Prepare a list to whom you consulted during the observation †¢ Prepare a list to whom you talked and gathered information by intervi ew †¢ If you had consulted any other person beyond court officials and quoted any factual or opinioned information, make a list †¢ Put a checklist that you prepared for conducting observation process

The Seven Principle Sociological Perspectives - 1920 Words

This hand-out will be explaining the seven principle sociological perspectives. The seven principle sociological perspectives are Functionalism, Marxism, Feminism, Interactionism, Postmodernism, The New Right and Collectivism. Sociology is the understanding of different people, breaking down the word sociology; ‘soci’ means society and ‘ology’ means the science of. The main aim of sociology is to try to describe and explain human behaviour within society. Sociology studies subjects such as religion, crime, family, law, poverty, prejudice, race and gender. Sociology also studies different terms which include social structures, social diversity and socialisation. A social structure means the things that make up society in the UK, for example how we have a free education system whereas a lot of other countries don’t and how we have the NHS which is a free health care system. Social diversity means the differences between people within a society, for exam ple age, race and gender are all diverse factors of society as they are all differences, other differences include religion, languages and ethnicity. There are two types of socialisation, primary socialisation is learning the norms like manners and expected behaviour from family members and what they believe is a ‘norm’. This is why people exhibit certain behaviour, because it’s what they’re family believe and what they are brought up to be like, for example their view on racism could differ due to what their family think.Show MoreRelatedSoc 185 Final Exam Solutions Answers5269 Words   |  22 Pagesthe seven basic principles put forth in the American Sociological Association’s Code of Ethics. Choose three of these principles, and anticipate how a researcher might encounter controversy by abiding by these principles (TCO 3, 8, 9) You have been asked by a committee of student success coaches to investigate why the rate at which freshman students post to their course threaded discussions is lower than the rate for other groups of students. Explain how the interactionist perspective wouldRead MoreA Sociological Perspective On Homelessness1587 Words   |  7 Pages1,243 are unsheltered. Through a sociological perspective, the social problems of homelessness can be analyzed through the concept of sociological imagination, the comparison of the person-blame approach and the system-blame approach, and through the analysis of one’s own community’s effort in helping those who are homeless. Firstly, C. Wright Mills’ concept of sociological imagination is â€Å"stimulated by a willingness to view the social worlds from the perspective of others† (Eitzen, Zinn, SmithRead MoreSoc 185 Final Exam Answers2755 Words   |  12 Pagesthe seven basic principles put forth in the American Sociological Association’s Code of Ethics. Choose three of these principles, and anticipate how a researcher might encounter controversy by abiding by these principles (TCO 3, 8, 9) You have been asked by a committee of student success coaches to investigate why the rate at which freshman students post to their course threaded discussions is lower than the rate for other groups of students. Explain how the interactionist perspective wouldRead MoreThe Spiritual Aspect Of A Person Is Crucial Because It1098 Words   |  5 Pageswhich people make decisions that influence the environment they live in and society. Moreover, based on this aspect, a person is provided with guidance to make relevant choices that affect their life and health. Thus, having a healthy spiritual perspective is needed for a person to live in harmony with themselves and the rest of society. Meanings of Spirituality Spirituality has multiples different meanings. People tend to see spirituality as religion, but even though spirituality is the core ofRead MoreThe Theoretical Methods Of Quantitative And Qualitative Methods Essay1652 Words   |  7 Pagesfor doing so has been long disputed. Although sociological method has been subject to many different styles and approaches, being constantly updated with new ideas and concepts, this essay will argue that in order to best reflect upon and develop an understanding of today’s world, the researcher needs to use and apply both qualitative and quantitative methods. To make this argument clear, this essay will first go into the understanding of sociological methods through epistemological and ontologicalRead MoreImmigration Perpectives in US1473 Words   |  6 Pagesdifferent than their parents, socially or professional, children maturing into adults will bring a wide variety of cultural changes and differences that older generations struggle to understand and see as odd, possibly even dangerous. Max Weber’s sociological philosophy for analyzing different values, morals and lifestyles with a neutral view point could be considered the only way we can grow as a society, integrate different ways of life into the giant melting pot of our world and understand youngerRead MoreThe Inequality Of Class Stratification950 Words   |  4 Pagesthe percentage of applicants accepted to higher education degree courses from seven socio-economic classifications from 2002-2008. The ‘lower managerial’ category had the highest percentage of accepted applicants, with an average of 36.23% per year. In contrast, the ‘lower supervisory’ background averages on 4.73%. It is fundamental to recognise that these categories are not the identified top and bottom of the seven class hierarchy, despite representing the highest and lowest level of applicantsRead MoreSociological Theories2211 Words   |  9 Pages-------- ----------------------------------------- SOC. 480, Sociological Theories Spring 2011 Lacy V. Wood ------------------------------------------------- SOC. 480, Sociological Theories Spring 2011 Taking It Big Charles Wright Mills is most commonly known for his theory of the sociological imagination. Through both the acknowledgement of biography and history within the context of sociology, his analysis was able to determine an interesting perspective that tied religion, the end of history, and sociologyRead MoreSocial Disorganization Theory And Cultural Deviance Theory1325 Words   |  6 PagesAs criminologist continue research on the sociological theories as it relates to the social structure, social process and the impact of social life. There is still room to compare and contrast the social structure theories that include social disorganization theory, strain theories and cultural deviance theory. The social disorganization theory was first referenced with the displacement among immigrants. Scholars believed this was due to the immigrants inability to transfer norms and values fromRead MoreWomen From Afar : Qing Guest Ritual And The Macartney Embassy Of 17931628 Words   |  7 PagesQ ing Empire has to take responsibility for the Opium War, the conflicts and those unequal treaties between China and the West, etc. Hevia’s Cherishing Men From Afar is to criticize this thoughts, and reinterpret the Macartney embassy bases on new perspective that are differs from other theories. Also, he attempts to bring back into consideration the political order that dominated Qing and British imperial formations. Cherishing Men From Afar is divided into ten chapters. The first chapter is the