In an air conditioner, 12.65 MJ of heat transfer occurs from a cold environment in 1.00 h.

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In an air conditioner, 12.65 MJ of heat transfer occurs from a cold environment in 1.00 h. 

(a) What mass of ice melting would involve the same heat transfer? 

(b) How many hours of operation would be equivalent to melting 900 kg of ice? 

(c) If ice costs 20 cents per kg, do you think the air conditioner could be operated more cheaply than by simply using ice? Describe in detail how you evaluate the relative costs.

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