44. What is the efficiency if a Carnot engine transfers 9.5×10³ J of energy from a hot reservoir during a cycle and dumps 2×10³ J heat to a cold reservoir?
(A) 0.69
(B) 0.84
(C) 0.79
(D) 0.65
(E) 0.72

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統計： A(2), B(2), C(44), D(1), E(3) #2751659