gc textbook chapter 12 Sound (id: 073dcb43d)

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]
An unfingered guitar string is 0.73 m lonrb(txz-x7s+( s)zac4p o:c yjv l2s:s g and ilqkt4 k8 97be -okf5ras tuned to play E above middle C (33a -98fklqob5 tk47er k0 Hz).
(a) How far from the end of this string must the finger be placed to play A above middle C (440 Hz)?$\approx$    m
(b) What is the wavelength on the string of this 440-Hz wave? $\approx$    m
(c) What are the frequency and wavelength of the sound wave produced in air at 20°C by this fingered string?    Hz    m

参考答案:
空格1: 0.18±2%  空格2: 1.1±2%  空格3: 440±2%  空格4: 0.78±2% 


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