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

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Two trains emit 424-Hz whistlew yd *kqhz3l-7nr-2i1s0j g6tm afvh:s. 0b* oxz,mlo( sOne train is stationary. The conductor on the stationmos* zx0lo,b(ary train hears a 3.0-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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