A 300 W heat pump operates between the ground, the temperature of which is , and the interior of a house at . What is the maximum amount of heat per hour that the heat pump can supply to the house? Give your answer to three significant figures.
A refrigerator has a coefficient of performance of 3.0 and it requires an input of J of work per cycle.
How much heat per cycle is removed from the cold reservoir?
How much heat per cycle is discarded to the hot reservoir?
A refrigerator discards 80.0 J of heat per cycle and its coefficient of performance is 6.0.
How much heat does the refrigerator remove from its cold reservoir per cycle?
How much work must the refrigerator do per cycle?