gc textbook chapter 12 Sound (id: 8869e7596)

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]
A fish finder uses a sonar device that sends 2haya5t-z9 h/q0,000oeqm4-d+k qvhl4ycf ra)+1,n -Hz sound pulses downward from the bottom of the boat, and t 4nv+)foq,lca dqey1k- rh+m4 hen 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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