Multiple Choice
A heat engine uses a tank of ice water as a cold reservoir. The engine takes in 8 kJ of heat from the hot reservoir, and the heat expelled melts 18g of ice in the tank. How much work does this engine do?
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Multiple Choice
An aircraft engine takes in 9 kJ of heat and expels 6.4 kJ of heat each cycle. How much mechanical work does the engine do each cycle?
A
15.4 kJ
B
2.6 kJ
C
2.6 J
D
6.4 kJ
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