9. An engine does 15 kJ of work while exhausting 37 kJ to a cold reservoir. What is the efficiencyof
問題詳情
9. An engine does 15 kJ of work while exhausting 37 kJ to a cold reservoir. What is the efficiencyof the engine? (A) 28.8 % (B) 38.8 % (C) 68.8 % (D) 88.8 % (E) 98.8 %