gc textbook chapter 12 Sound (id: efb7f7ac6)

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]
An ocean fishing boat is drifting just above a school of tk-nvr1*+7w0 w r 0 zaj j chaopijk()4cd5.dpouna on a*a q)ovdt5q:ef7ii28g2 cdx( s3 pbao foggy day. Without warning, an engine backfire occurs on another boat 1.0 km away (Fig. 12–33). How much time elapses before the backfi*oi(:5 3ceob pgf)7s2v aia dqtx82dqre is heard (a) by the fish,    s (b) by the fishermen?    s

参考答案:
空格1: 0.64±2%  空格2: 2.9±2% 


本题详细解析:

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