gc textbook chapter 12 Sound (id: c01598866)

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]
At a race track, you can estimatexw5g1 d pceg-q./ itn-zzc) 5 vikiwwp7+s52r the speed of cars just by listening to the diffe5i 2i)p5 cz+ rsvwwz7krence in pitch of the engine noise between 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%


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