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During one cycle a heat engine transfers 4 X 103 J of heat from a hot reservoir and exhausts 2.4 X 103 J to a cold reservoir.
[a] What is the efficiency of the engine?
[b] How much work is performed by this engine in one cycle?
[c] What is the coefficient of performance of a heat pump that removes 3 X 103 J of heat from a cold reservoir and exhausts 4 X 103 J to a hot reservoir during one cycle?
A square loop has sides 12 cm long and is wound with 50 turns of wire carrying 250 mA of current. what torque does the loop experience
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