An ice-making machine operates in a Carnot cycle. It takes heat from water at 270 K and rejects heat to the room 300 K.  Suppose 300000 J of heat is extracted from the cold reservoir per cycle. 27. What is the thermal efficiency of this engine? 28.  How much heat is discarded to the room per cycle?

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A: Temperature of hot reservoir = 600 k Temprature of cold reservoir = 300 k

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A:

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A: The correct option is C.

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