本题目来源于试卷: Efficiency, coefficient of performance and Carnot Cycle,类别为 美国物理杯赛(Physics Bowl)
[单选题]
10.49: A monatomic ideal g bc zy// xp 8n(qn.jt fm87 l*k;/rkq)dw8tqqga yjk dwq,z(u21s is the working substance for an engine that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric or isobaric with p (qu,wjy12 kd zressures between $P_0$ and $2P_0$ and volumes between $V_0$ and $1.5V_0$ . What is the efficiency of this engine?

A. 1/8
B. 1/5
C. 1/3
D. 2/3
E. 5/7
参考答案: A
本题详细解析:
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