gc textbook chapter 12 Sound (id: 8869e7596)

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 fish finder uses a sonar device that sends 20,000s p5g2hh8)yqj -Hz sound pulses downg: p,rsh s gsxc-jpx8i(fz2 9oxr3gu*7jlm2 -ward from the bottom of the phgofjg rs79sxl: is- p8(gz3, ux-r2mcjx2*boat, and then detects echoes. If the maximum depth for which it is designed to work is 200 m, what is the minimum time between pulses (in fresh water)?    s

参考答案: 0.28±2%


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