Calculating Efficiency. Efficiency (%) = Useful Energy Out x 100 Total Energy In Questions 1) A light bulb takes in 30J of energy per second. It transfers 3J as useful light energy and 27J as heat energy. Calculate the efficiency. 2) A kettle takes in 2000J of energy per second. It transfers 1500J as useful heat energy and 500J is wasted as sound energy. Calculate the efficiency of the kettle. Remember: In the exam they may not
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Potential Energy Potential Energy is a type of energy that does not involve motion. It is the energy that is stored up. The more work done to change an object’s position or shape‚ the more potential energy it has. For example‚ a person on a ladder has more potential energy than a person on the ground because they have done more work to get up there. Kinetic Energy Kinetic Energy is the energy of motion. The more work an object has done‚ the more kinetic energy it has. the amount of kinetic
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Anissa Allred Mrs. Anderson English 8th 14 March 2011 Energy Drinks Are you ever extremely tired? In the generation we live in today‚ the average person does not get the eight hours of sleep that the body needs. They do not eat right or take vitamins‚ and they do not get the physical exercise they need to keep their body healthy. As a result; they get extremely tired‚ stressed‚ and moody by the middle of the day. A smart choice would be to get more hours of sleep‚ eat healthy‚ take vitamins
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Topic Canada should subsidize renewable energy options such as wind and solar power in order to increase the share of renewables in Canada’s energy balance. Introduction Canada government subsidizes a number of socially beneficial services‚ including health care‚ education and energy services. Subsidies to the energy sector mainly are for oil and gas production‚ however‚ they are not all socially beneficial[figure 1]. In fact‚ they have negative impact for the environment and hinder
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Renewable Energy is Best Michelle Johnson HUM/111 March 26‚ 2011 L. Flemister Renewable Energy is best America’s dependency on foreign oil is costing us more than just money; it costs us our clean air and potentially thousands of jobs in America. Our nation needs to create its own renewable energy. The dependency on other countries is crippling our economy. Drilling for oil in the United States is not the answer. We need to take better care of our planet and that each of us must
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Atomic energy is energy produced by atoms. The term originated in 1903 when Ernest Rutherford began to speak of the possibility ofatomic energy.[1] The term was popularized by H. G. Wells in the phrase‚ "splitting the atom"‚ devised at a time prior to the discovery of the nucleus. Atomic energy also may refer to: * Nuclear binding energy‚ the energy required to split a nucleus of an atom * Nuclear potential energy‚ the potential energy of the particles inside an atomic nucleus * Nuclear
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Work & Energy Physical Science Ms.Barconey May 8‚ 2013 Work is the transfer of energy to an object by the application of a force that causes the object to move in the direction of the force. Three examples of work would be a tractor pulling a float‚ a mother pushing a baby stroller‚ and a body builder lift a barbell over their head. Work is measured in joules and the formula for work is Work=Force*Distance. Power is a quantity that measures the rate at which work is done
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examples of work done=force x distance What is work? Work in physics is the transfer of energy; work is done on an object when an applied force moves it through a distance. The link between work and energy is work done equals energy transferred. The units for the two are also the same (joules). E.g. 500J of work = 500J of kinetic energy. Work is calculated with the formula: work done=force x distance moved For example‚ if a force of 10 newton (F = 10 N) acts along point that travels 2 meters
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Energy[edit] Aralvaimozhy railway station in Kanyakumari District with a view of wind farm Starting from the second quarter of 2010‚ the total energy demand in Tamil Nadu state is increasing exponentially[citation needed] and the state government is helpless to cut off power supply to an vast extent to the consumers. The complete state (except Chennai city‚ the capital) suffers a power cut for more than 11 hours a day. The city of Chennai only has 2 hours of power cuts a day.[citation needed]
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Colegio salvadoreño ingles Environmental Management “Why ecologic energy has to become the one to feed our transportation methods?” By: Douglas Ascencio 10°B Mr. Hunt Monday‚ January 21st‚ 2013. My thesis question is “why ecologic energy has to become the one to feed our transportation methods?” I chose this question because I’ve noticed that in the Salvadorian society the transportation as well as its very varied methods have become a vital part of its development and it is almost
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