Projectile Motion

.0 Introduction In this project, it was decided to use home-made air launcher propelled by air to observe projectile motion. The air launcher is made from plastic water bottle and the air is released in an instant as soon as the air launcher is blasted off. The air launcher is in a projectile motion as soon as it is blasted off as the only force acting on it is gravity. Data such as flight time, range, highest point and others will be collected to determine the constant of gravity acceleration. Three different materials: rubber, plastic and aluminium, have been used as specified in the requirement of this project. The mass of each material is different but the surface area that is in contact with the air is constant. As the mass of each water bottle is different, the launching pressure for each water bottle is different. Pressure is directly proportional to the launching velocity. To achieve a constant launching velocity, the pressure used has to be varied accordingly. In the experiment, the behaviour of the projectile motion is different from the theoretical prediction. The water bottle will travel less horizontally or vertically. The effect of air resistance will slow down the bottle while it is on its course up. The direction of air resistance is acting in the same direction of the gravity, thus the water bottle is brought slower at a faster rate. On its way

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  • Level: University Degree
  • Subject: Physical Sciences
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Social Movements, Law, and Society - The Institutionalization of the Environmental Movement.

Social Movements, Law, and Society: The Institutionalization of the Environmental Movement Cary Coglianese Harvard University John F. Kennedy School of Government 79 John F. Kennedy Street Cambridge, Massachusetts 02138 [email protected] Copyright (c) 2001 by Cary Coglianese. All rights reserved. Forthcoming in the University of Pennsylvania Law Review. Social Movements, Law, and Society: The Institutionalization of the Environmental Movement Cary Coglianese* Social change lies at the heart of the definition of a social movement. A social movement is a broad set of sustained organizational efforts to change the structure of society or the distribution of society's resources.1 Within social movements, law reformers typically view law as a resource or strategy to achieve desired social change.2 Since social change is the purpose of a social movement, law reform generally is taken to provide a means of realizing that goal.3 According to this conventional view, social movements, law reform, and society interact in a simple, unidirectional fashion. Social movement organizations seek to secure law reform; in turn, changes in the law bring about changes in society. While this conventional conception dominates much research and can be helpful for the purpose of analyzing the direct effects of social movement law reform,4 it misses several important

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  • Level: University Degree
  • Subject: Physical Sciences
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A 0.60 um film of silicon dioxide is to be etched with a buffered oxide etchant of etch rate 750 A min-1. Process data shows that the thickness may vary up to 10% and the etch rate may vary up to 15%.

Andy Somody 97300-6222 ENSC 495 Assignment #3 6-1). a). A 0.60 um film of silicon dioxide is to be etched with a buffered oxide etchant of etch rate 750 A min-1. Process data shows that the thickness may vary up to 10% and the etch rate may vary up to 15%. The maximum possible thickness of the silicon dioxide film is therefore 110% of its nominal value. Therefore, the maximum possible thickness of the silicon dioxide film can be determined through the following calculation: where zmax is the maximum possible thickness of the silicon dioxide film and znominal is the nominal thickness of the silicon dioxide film. Therefore, znominal = 0.60 um. Any number expressed as a percentage can alternatively be expressed as a decimal. For example, 110% can be expressed as 1.1. Using this decimal format, the above formula can be rewritten in the following manner: Substituting our previously determined value for znominal into the above formula yields: with significant figures applied Similarly, the minimum possible etch rate of the buffered oxide etchant is 85% of its nominal value. Therefore, the minimum possible etch rate of the buffered oxide etchant can be determined through the following calculation: where rmin is the minimum possible etch rate of the buffered oxide etchant and rnominal is the minimum possible etch rate of the buffered oxide etchant. Therefore, rnominal =

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  • Level: University Degree
  • Subject: Physical Sciences
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Building the national health information infrastructure for personal health, health care services, public health, and research

Building the national health information infrastructure for personal health, health care services, public health, and research Abstract Background Improving health in our nation requires strengthening four major domains of the health care system: personal health management, health care delivery, public health, and health-related research. Many avoidable shortcomings in the health sector that result in poor quality are due to inaccessible data, information, and knowledge. A national health information infrastructure (NHII) offers the connectivity and knowledge management essential to correct these shortcomings. Better health and a better health system are within our reach. Discussion A national health information infrastructure for the United States should address the needs of personal health management, health care delivery, public health, and research. It should also address relevant global dimensions (e.g., standards for sharing data and knowledge across national boundaries). The public and private sectors will need to collaborate to build a robust national health information infrastructure, essentially a 'paperless' health care system, for the United States. The federal government should assume leadership for assuring a national health information infrastructure as recommended by the National Committee on Vital and Health Statistics and the President's Information

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  • Level: University Degree
  • Subject: Physical Sciences
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The current system of environmental governance is a diffuse process, spread through many different treaty bodies and other U.N. institutions. At present UNEP, is the primary environmental organ in the system.

INTRODUCTION When the United Nations was founded in 1945, environmental issues were not yet on most national agendas, let alone on the international agenda. As a consequence, the U.N. Charter does not even mention the word "environment". In the years since, environmental degradation has emerged as a pressing international concern. Wind currents, rain patterns, rivers, and streams carry pollutants hundreds or even thousands of miles from their sources, violating national borders with impunity. On an even larger scale, the global environmental problems of ozone depletion, climate change, deforestation, and the loss of the Earth's biological diversity threaten all nations.1 Furthermore, recent research identifies population growth and natural resource scarcity as important factors in exacerbating social tensions and provoking conflict in many corners of the globe. As the problems have worsened, environmental issues have gradually moved onto the international political agenda. To date, governments have adopted more than 170 environmental treaties concerning subjects of shared concern: acid rain contamination, ocean pollution, endangered species depletion, hazardous waste exportation, and Antarctica preservation. More than two-thirds of these agreements have been reached since the landmark 1972 U.N. Conference on the Human Environment in Stockholm. This conference created the

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  • Subject: Physical Sciences
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How should the radioactive waste from nuclear power plants be disposed of? Why has the nuclear industry failed to find an acceptable solution to the problem of nuclear waster disposal?

How should the radioactive waste from nuclear power plants be disposed of? Why has the nuclear industry failed to find an acceptable solution to the problem of nuclear waster disposal? I. INTRODUCTION Nuclear power is an important source of energy in many countries, even as the commissioning of new power reactors has slowed in recent years. More than 30 countries use nuclear power to meet approximately 16% of global energy needs, with the nuclear power component of total energy ranging from 76% in France (according to the International Atomic Energy Agency) to 1.4% in Brazil. In the U.S., approximately 20% of the electricity is generated from nuclear power.There are more than 400 nuclear power plants around the world, with more than 100 in the United States. However, additional nuclear power reactors are not currently being commissioned and have not been commissioned in the recent past. This is due to the issue of nuclear waste management that has become an increasingly major factor in the future and present use of nuclear power plants. The plants use either light water reactors or boiling water reactors and produce the greatest amounts of nuclear waste measured in curies /year. This waste is potentially hazardous to those who get exposed to it therefore it must be safely disposed of. In the US the Department of Energy (DOE) has been mandated by law to conduct research on

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  • Level: University Degree
  • Subject: Physical Sciences
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Forensic Chemistry - Ion Selective Electrode. The objective of experiment is to determine the chloride and nitrate (toxic anions) in samples from the calibration curve

SINGAPORE POLYTECHNIC SCHOOL OF CHEMICAL LIFE SCIENCES Diploma of Applied Chemistry with Pharmaceutical Science Experiment No. 3 Metal Toxicity Module Code (CP 4098) Desmond Seah (P1006812) Year of Study: Year 2 DACP/FT Lecturer Jeffrey Whey AY 11/12 ________________ Content Page Synopsis Page . Introduction 1-2 2. Theory 2-12 3. Procedure 12-13 4. Results and calculation 13-14 5. Discussion 14-24 6. Conclusion 24 References List of Illustration S/N Figures and Tables Page Number Types of electrode with diagram 7 2 Internal structure of Ion selective electrode 8 3 Possible interferences with reference solutions stated 9 4 Calibration curve of Ion

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  • Level: University Degree
  • Subject: Physical Sciences
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Optimizing a Windows-Based Computer Data Acquisition and Reduction System for the General Chemistry Laboratory

Optimizing a Windows-Based Computer Data Acquisition and Reduction System for the General Chemistry Laboratory DUE 9652855 Ed Vitz Kutztown University Brenda Egolf Evaluation Specialist Introduction There were three major products of this project: (1) The first is a new version of the LIMSport laboratory manual based on Excel, which is used in all sections of the General Chemistry course at Kutztown University, and Excel? laboratory templates necessary to support it. The original version was based on DOS/Lotus 1-2-3?. A sample chapter has been submitted as a separate file in the Activities Section of this report. (2) Second, we completed a formal assessment of the efficacy of our computer-centered LIMSport Laboratory Program at Kutztown University in an attempt to determine what level of computer prompting is optimal for first year science students. The results of that study are reported below. And Finally, (3) we found it necessary to redesign all of the software, and some of the hardware components of the LIMSport system in response to unanticipated changes by Microsoft? in the Windows? operating system. A copy of an article written for Scientific Computing and Instrumentation, which describes the project and includes acknowledgements of NSF support, is included in the Activities Section of this report. Assessment of LIMSport Curriculum Development Project

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  • Level: University Degree
  • Subject: Physical Sciences
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Greenback Bank: Environmental Policy Analysis. Greenback Bank: Environmental Policy Analysis

Greenback Bank: Environmental Policy Analysis Within corporations, nearly 1.5 pounds of paper are used per person per day.1 Based on a typical Fortune 500 company with 10,000 employees and a 255 workday year, this equates to over 3,825,000 pounds of paper per year. Our company, Greenback Bank, headquartered in Dallas, TX, has developed a progressive environmental policy to address this issue and many others. Greenback Bank has approximately 350 branches nationwide and it employs over 11,000 people. Greenback is a publicly traded company and is classified as a Fortune 500 company based on its revenues. Over the past five years, Greenback's financial performance has continued to increase. As a result of the recovering economy, Greenback has decided to implement a growth strategy to expand its branch network. This expansion has created a significant need to develop and implement an environmental policy. ENVIRONMENTAL MISSION STATEMENT We have benefited from the communities we serve and with our continued growth we want to ensure the customers, families, and entire communities that they will be served by an institution that is actively taking steps to be an environmentally friendly company. ENVIRONMENTAL VISION * Utilize energy efficient technologies and implement environmentally friendly designs for all new construction * Maximize the use of recycled materials and

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  • Level: University Degree
  • Subject: Physical Sciences
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Implementation of national adaptation programs of action in order to provide immediate and urgent support to start adapting to current and projected adverse effects of climate change in Bangladesh.

PROJECT TITLE: Implementation of national adaptation programs of action in order to provide immediate and urgent support to start adapting to current and projected adverse effects of climate change in Bangladesh. ESTIMATED TOTAL BUDGET: US$ 250,000 ESTIMATED STARTING DATE: January 2008 DURATION: 18 months . Background of the Project: Bangladesh is a country situated on the northeastern side of South Asia bounded by India on the west and the north, by India and Myanmar on the east and by the Bay of Bengal on the South (see Map). Numerous rivers, small channels and backwaters intersect the country's plain lands. Much of the present plain was originally an estuary, which was filled up by the combined drainage system of the Ganges, Brahmaputra and Meghna rivers (total length of drainage channel is estimated at more than 200,000 kms). These rivers continuously enrich the alluvial soil of the plains with heavy silt deposits. Thus, the rivers are of utmost importance in developing the country's vast flat alluvial land and in directly and indirectly influencing the economic activities through their impact on agriculture. The country has a typical monsoon climate as the monsoon wind, to a large extent, determines the country's rainfall and temperature. There are 3 distinct seasons: winter (November to February), which is relatively cool, sunny and dry; summer (March to

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  • Level: University Degree
  • Subject: Physical Sciences
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