Three Carnot engines operate between temperature reservoirs as follows: Engine A: T_h = 1 300 K,T_c = 1 000 K;Engine B: T_h = 1 000 K,T_c = 700 K;Engine C: T_h = 650 K,T_c = 500 K.Which two engines have the same thermal efficiency?

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The Answer of Three Carnot engines operate between temperature reservoirs as follows: Engine A: T_h = 1 300 K,T_c = 1 000 K;Engine B: T_h = 1 000 K,T_c = 700 K;Engine C: T_h = 650 K,T_c = 500 K.Which two engines have the same thermal efficiency?

Three Carnot Engines Operate Between Temperature Reservoirs as Follows: Engine