11. A Carnot engine takes 2000 J of heat from a reservoir at 500 K, does some work, and discards som
問題詳情
11. A Carnot engine takes 2000 J of heat from a reservoir at 500 K, does some work, and discards some heat to reservoir at 300 K.What is its efficiency? (A) 0.2 (B) 0.3 (C) 0.4 (D) 0.5 (E) 0.6