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Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.
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Relative to the ground below, how many joules of potential energy does a 1000-kg boulder have at the top of a 5-m ledge?
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Kinetic energy is the energy of motion. How could a person determine how much kinetic energy an obje...
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