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 tra(i+i50sc2ct ge.l sea- 0h hrtvyebb(i/pzyq :/jc;5n pik8yrqb g 4.7eling at k.0 km/s strikes a boundary within the Earth between two kinds of material. If it approaches the boundary at an incidkneqpr7c(gy.58qjb;/p/ i4ybz b :iyent 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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