gc textbook chapter 11 Vibrations and Waves (id: 270a9a7d4)

本题目来源于试卷: gc textbook chapter 11 Vibrations and Waves，类别为 IB物理学

[填空题]
An earthquake P wave traveling b+w9 fb;.nqn yat k.0 km/s stri6.h s-c hnqk:akes a boundary within the Earth between two kinds of matera.n ks:-hhqc 6ial. If it approaches the boundary at an incident angle of 47 $^{\circ} $ and the angle of refraction is 35 $^{\circ} $, what is the speed in the second medium?    km/s

参考答案: 6.3±2%


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