Ajoule is an amount of energy, and a watt is a rate of using energy, defined as 1 w = 1 j / s. how many joules of energy are required to run a 100 w light bulb for one day?
coal has about 30e6 j of energy per kg, but a power plant can only use 30% of this energy to make electricity (i. e., it is 30% efficient). how many kilograms of coal have to be burned to light a 100 w light bulb for one day?
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Physics, 22.06.2019 04:00
Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?
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Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?
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Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack
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Which branches of natural science include the study of an organism that lived 10 million years ago
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Ajoule is an amount of energy, and a watt is a rate of using energy, defined as 1 w = 1 j / s. how m...
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