A refrigerator is a
A. heat engine working in the backward direction
B. air cooler
C. an electric motor
D. heat engine
Answer:A
A refrigerator is a
A. heat engine working in the backward direction B. air cooler C. an electric motor D. heat engine
Heat engine working in a backward direction Explanation: As we know, a heat engine is something that converts heat into mechanical work. Usually, a refrigerator is a device that is used to cool things. But according to the second law of thermodynamics, a refrigerator is a device that is used to turn mechanical work into heat. Therefore, we can say that a refrigerator is a heat engine that works in a backward direction.