gc textbook chapter 12 Sound (id: 33c988ea8)

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]
Two piano strings are u 7t0phi55ll rsuppose k;w cm cbo-p;g0wfs.*e y+7lgd to be vibrating at 132 Hz, but a piano tuner hears three beats every 2.0 s when they are playp 0;g-+k.fwgbyso;*wm cc el7ed together. (a) If one is vibrating at 132 Hz, what must be the frequency of the other ?   Hz    Hz
(b) By how much (in percent) must the tension be increased or decreased to bring them in tune?   % increase    %decrease

参考答案:
空格1: {130.5|133.5}±2%  空格2: {130.5|133.5}±2%  空格3: 2.3±2%  空格4: 2.2±2% 


本题详细解析:

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