A Carnot refrigerator operating between $-30\mathrm{.}0$Cand $+10\mathrm{.}0$C extracts heat from the cold reservoir at the rate $300$ J$/$s $.$

Part A

What is the coefficient of performance of this refrigerator?

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Part B

What is the rate at which work is done on the refrigerator?

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Part C

What is the rate at which heat is exhausted to the hot side?

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