3.A heat engine having an efficiency of ...

3.A heat engine having an efficiency of "70%" is used to drive a refrigerator having a co-efficient of performance of "5." The energy absorbed from low temperature reservoir by the refrigerator for each kJ of energy absorbed from high temperature sources by the engine is (approximately)

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3.A heat engine having an efficiency of "70%" is used to drive a refrigerator having a co-efficient of performance of "5." The energy absorbed from low temperature reservoir by the refrigerator for each kJ of energy absorbed from high temperature sources by the engine is (approximately)

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