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College Physics
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A freezer maintains the freezer compartment at 20o C. while the air surrounding the freezer is at 25o C. The rate of
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- 9) A heat pump is used to move heat from 10°C air outside, to a 22 °C air inside. The practical coefficient of performance of this pump is 4.1, and it uses 12000 J of electric energy. a) Find the energy this system adds to the house. b) Find the theoretical (maximum) coefficient of performance for this system. 5arrow_forwardA heat engine operates between a reservoir at 28°C and one at 350°C. What is the maximum efficiency possible for this engine? Need Help? Read Itarrow_forward3. A diesel engine performs 2200 J of mechanical work and discards 4300 J of heat each cycle. (a) How much heat must be supplied to the engine in each cycle? (b) What is the thermal efficiency of the engine?arrow_forward
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