阿摩線上測驗
49. An 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%
(B) 40%
(C) 50%
(D) 80%
(E) none of the above
答案：登入後查看
統計： A(0), B(13), C(4), D(0), E(0) #3222816
統計： A(0), B(13), C(4), D(0), E(0) #3222816
