Space Time & Motion A.3 Work Energy and Power (id: 38177ec3e)

本题目来源于试卷: Space Time & Motion A.3 Work Energy and Power，类别为 IB物理学

[单选题]
A car engine has an input power of $P_{in}$ and efficiency of η. Which of the following gives the wasted energy from the engine in time of $t$.

A. $P_{in}\;ηt$
B. $P_{in}\;\frac{η}{t}$
C. $P_{in}t-P_{in}ηt$
D. $P_{in}t-\frac{η}{t}$


参考答案:  C


本题详细解析:

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