gc textbook chapter 12 Sound (id: e2868b27c)

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

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A bat emits a series of high frequency sound pul8nfuj (hxj y+yh(/ x0r(m/ink se(x 9rz6fev(jez9 3zsns as it approaches a moth. The pulses are approximately 70.0 ms apart, and each is about 3.0 ms long.9zfeves(6zj 3xz 9 r(n How far away can the moth be detected by the bat so that the echo from one chirp returns before the next chirp is emitted?    m

参考答案: 11.5±2%


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