Romar M. Cabinta EXERCISES 15 WORK‚ ENERGY‚ AND POWER A. CONCEPTUAL QUESTIONS 1. Is work done when you move a book from the top of the desk to the floor? Why? Yes. It is because the displacement of the book from the top of the desk to the floor and the force that is applied to the book is parallel with one another. 2. State the law of Conservation of Mechanical Energy in two ways? The law of conservation of energy states that energy may neither be created nor destroyed.
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Negative and Positive Ecological Impacts of Technology Introduction In today ’s society more people are working longer hours and utilizing more technology in their everyday life. As a result of these longer hours and increased use of technology‚ more energy is being consumed. (Hayden and Shandra 575) The impact that this is having on the environment is substantial in both negative and positive ways. It is hard to deny the benefits modern technology has produced for the world‚ in industry and in everyday
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ENERGY RESOURCE PLAN Conserving energy is important to our society because it can extend the life time of non-renewable resources. Examples of these are oils‚ coal ‚ and gas. It also minimizes the use of larger more dangerous and environmentally damaging sources ‚such as deep sea oil and tar deposits. Currently the world produces 20 million barrels of oil each year. One-third of that is used by the United Sates. Concidering that only %35 of an oil well can be recoverd one-third is a lot to consume
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effective exchange rate‚ and the existence of foreign exchange reserves and capital investment would cause output to rise. In Pakistan‚ besides making adjustments at the macro level‚ what is required is to make rational choices about the development of energy mix for the future to reduce the risk of oil price fluctuations in
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(MW) TYPE HYDEL (WAPDA) THERMAL (WAPDA) THERMAL (KESC) THERMAL (IPPs) NUCLEAR Total Capacity NUMBER OF STATIONS 14 14 4 16 2 Installed Capacity 2002 6‚494 4‚835 1‚756 5‚832 462 19‚379 % Share in Total Capacity 34 % 25 % 9% 30 % 2% 100 % Source: Energy Book 2005‚ Hydrocarbon Development Institute of Pakistan. 2 POWER POLICY 2002 • Exemption from income tax including turnover tax and withholding tax on imports for the projects based on indigenous fuel. • No exemption of income tax on oil-fired
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Depletion of Natural Resources - Oil DEPLETION OF ENERGY RESOURCES Modern industrial society is based on a triad of hydrocarbons‚ metals‚ and electricity. The three are intricately connected; each is accessible only if the other two are present. Electricity‚ for example‚ can be generated on a global scale only with hydrocarbons. The same dependence on hydrocarbons is true of metals; in fact the better types of ore are now becoming depleted‚ while those that remain can be processed only with modern
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How does my wind generator work? Every wind generator‚ whether they produce enough energy to power a city or to power a small radio‚ works on these same basic principles... 1. The wind blows 2. The generator’s vane (tail) causes it to turn into the wind 3. Blades attached to an alternator/generator experience the force of lift and begin to spin 4. The spinning creates electricity for us to use directly or to charge batteries Sounds pretty simple eh? Well‚ then how the heck do I build one
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0013-7227/01/$03.00/0 Printed in U.S.A. Endocrinology 142(10):4163– 4169 Copyright © 2001 by The Endocrine Society Minireview: Ghrelin and the Regulation of Energy Balance—A Hypothalamic Perspective TAMAS L. HORVATH‚ SABRINA DIANO‚ PETER SOTONYI‚ MARK HEIMAN‚ ¨ MATTHIAS TSCHOP AND Reproductive Neuroscience Unit (T.L.H.‚ S.D.)‚ Department of Obstetrics and Gynecology and Department of Neurobiology (T.L.H.)‚ Yale Medical School‚ New Haven‚ Connecticut 06520; Department of Anatomy and Histology (P
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2008. She is presently rounding up her LL.M in Environmental Law & Policy and MSc. in International Oil & Gas Management at the CEPMLP‚ University of Dundee. She is a member of the Nigerian Bar Association‚ Society Petroleum of Engineers‚ and the Energy Institute. Email:ncmaduekwe@yahoo.co.uk TABLE OF CONTENTS ABBREVIATIONS ................................................................................................................. iii 1.0 2.0 3.0 INTRODUCTION ........................
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QUESTION( Conservation of Energy) 1. Missy Diwater‚ the former platform diver for the Ringling Brother’s Circus had a kinetic energy of 15 000 J just prior to hitting the bucket of water. If Missy’s mass is 50 kg‚ then what is her speed? Solution: According to energy conservation‚ the kinetic energy at the bottom of the dive (15‚000J) is equal to her gravitational potential energy before the dive. We can use this fact to find her dive height: PE = mgh h = PE/mg = 15‚000J / (50kg)(9.81m/s²)
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