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

[填空题]
An earthquake P wave traveli6wv6ydob6u i:2t f4gb ng at k.0 km/s s;yqgc2p zz.( ntrikes a boundary within the Earth between two kinds of material. If it approaches the boundary at an incident angle of 4cy2.qgz (zpn;7 $^{\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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