gc textbook chapter 12 Sound (id: 835966964)

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]
Two trains emit 424-Hz whistles. One tr. i3 xrd-muco mrm1,f8ain is stationary. The b) xmz(wm99riconductor on the stationary train hears a 3 zb)(99imxrm w.0-Hz beat frequency when the other train approaches. What is the speed of the moving train?   m/s

参考答案: 2.41±2%


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