gc textbook chapter 12 Sound (id: b23d7cbfd)

本题目来源于试卷: gc textbook chapter 12 Sound，类别为 通用国际物理

[填空题]
The frequency of a steam train whistlm 2k /wtl(tu7ln/f ypa7nkc9 6e 7-l3 ykyz2inkas it approaches you is 538 Hz. After it passes you, its frequency is measlzki3ny7-2yk ured as 486 Hz. How fast was the train moving (assume constant velocity)?    m/s

参考答案: 17±2%


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