gc textbook chapter 12 Sound (id: c01598866)

本题目来源于试卷: gc textbook chapter 12 Sound，类别为 IB物理学

[填空题]
At a race track, you camuiu :4y.k mz7/eq x ,u,-wptkn estimate the speed of cars just bvn7a; xrugy2,d8xm : ay listening to the difference in pitch of the engine noise be 2a,mx8ad ;yu7g nr:xvtween approaching and receding cars. Suppose the sound of a certain car drops by a full octave (frequency halved) as it goes by on the straightaway. How fast is it going?    m/s

参考答案: 114±2%


本题详细解析:

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