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 通用国际物理

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An earthquake P wave tb6mzc )i+ahe p o7e;j*ra/;9(9ufv co ajvp 7*mgs 5qvmxveling at k.0 km/s strikes a boundary within the Earth between two kinds of material9 p(/m *uvvgjxac97v5;f somq . 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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