Physics Unit15: Laws of Thermodynamics (id: 80b6b4d27)

本题目来源于试卷: Physics Unit15: Laws of Thermodynamics，类别为 国际高中通用物理

[单选题]
A heat engine receivh/kdid xph.zj;p4 23 zes 7000 J of heat and loses 3000 J in each cycle. What;of1ru7*o rrn is the effico*1 7nu; forrriency?

A. 57%
B. 30%
C. 70%
D. 43%


参考答案:  A


本题详细解析: 暂无

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