gc textbook chapter 11 Vibrations and Waves (id: 806dd8b68)

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]
A sound wave is traveling in warm air when it hits a layer m*xx d8 *k)(d hfopq-dof cold, dense air 5 +8x2nmlslvi. If the sound walils 5 2m8+xnvve hits the cold air interface at an angle of 25$^{\circ} $, what is the angle of refraction? Assume that the cold air temperature is $ - 10 ^{\circ} C$. and the warm air temperature is $ + 10 ^{\circ} C$. The speed of sound as a function of temperature can be approximated by v=(331+0.60T) m/s where T is in $ -10 ^{\circ} C$.    $^{\circ} $

参考答案: 24±2%


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