Particulate Nature of Matter B.4 Thermodynamics (id: a16c79f3a)

本题目来源于试卷: Particulate Nature of Matter B.4 Thermodynamics，类别为 IB物理学

[单选题]
Heat engine $X$ takes heat energy $Q_H​ $ from the hot reservoir to deliver work $W$ and reject heat energy $Q_C​$ in the cold reservoir. Another heat engine $Y$ takes heat energy $5Q_H​$ to deliver $2W$ and reject $7Q_C$​.
What is the efficiency of engine $Y$?

A. 3.6%
B. 16%
C. 22.2%
D. 40%


参考答案:  B


本题详细解析:

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