問題詳情
49.tAn engine's heat input per second is 8.0 kJ at 500 K reservoir and output per second is 4.0kJ at 300 K reservoir. What is the Carnot efficiency of this engine?
(A) 20%t
(B) 40%t
(C) 50%t
(D) 80%t
(E) none of the above
參考答案
答案：B
統計：A:0,B:1,C:0,D:0,E:0
難度：計算中