gc textbook chapter 12 Sound (id: 28c961552)

本题目来源于试卷: gc textbook chapter 12 Sound，类别为 通用国际物理

[填空题]
(a) Calculate the wavelenkn:ag u)8wmd,x6lbois 4z )p2gl mk0f61yy jen a,z,/dths in air at 20 $^{\circ} $ C for sounds in the maximum range of human hearing, 20 Hz to 20,000 Hz. $\lambda_{20Hz}$ =    m $\lambda_{20kHz}$ =    $ \times10^{-2 }$ m(b) What is the wavelength of a 10-MHz ultrasonic wave?    $ \times10^{ -5}$m

参考答案:
空格1: 17±2%  空格2: 1.7±2%  空格3: 3.4±2% 


本题详细解析:

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