Chemistry

Chemistry, 23.06.2019 02:00, BluSeaa

What is the source of continuous heat and energy that we receive from the sun

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Physics, 23.06.2019 16:30, peteh5

No matter what energy transformation we discuss, we know that no energy transfer is 100% efficient. you are about to enter a bicycle rave. you have trained extensively and eaten well to maximize your energy input throughout the bicycle race. you know that some of your kinetic energy will become wasted energy in the form of heat. what is the source of the heat energy and how can you minimize it to maximize the efficiency of your performance in the race? a) you are the source of the heat energy. you can minimize the heat energy but selecting the appropriate clothes to wear. b) air resistance is the source of he heat energy. you can minimize the air resistance by your position while riding the bicycle. c) friction is the source of the heat energy. you can minimize the friction by lubricating all appropriate parts and keeping the tires well inflated. d) kinetic energy is the source of the heat energy. you can reduce the production of heat energy but minimizing the energy you expend to race on the bicycle.

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Physics, 29.06.2019 19:50, xojade

1. energy of motion kinetic energy 2. potential energy = (mass height) geothermal energy 3. energy that results when a temperature change occurs potential energy 4. energy from the sun force heat energy 5. the numerical equivalent of energy energy whose source is the force of the moon's gravity causing motion of the earth's waters 7. energy that is produced by heat from the earth solar energy tidal energy work 8. energy of position 9. a energy - displacement acceleration due to gravity 10. energy derived from the nucleus of an atom nuclear energy

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Engineering, 11.07.2019 04:20, liferoblox666

An engineer proposes to have a heat engine that will receive heat from a source at 1000 k and reject heat to a sink at 400 k. the heat engine will produce 500 kw of power aft er receiving 750 kw of heat.this process is possible. a)- true b) false

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Physics, 28.07.2019 23:20, darkstorm2277

The laws of thermodynamics state that, in a heat engine, energy flows from a cold source to a warm target all the heat energy from a source cannot be converted to mechanical energy all the heat energy from a source must be converted to mechanical energy entropy cannot change during heat flow

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