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 estimxbcdje6k k:(8 oa sov3;9pi z;at ,3slyd :4vvmtn2k,z4 -nxsip e the speed of cars just by listening to the diffe ,kit4z2m3v d:y4,sx nvpnsl-rence 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%


本题详细解析:

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