Two organ pipes, open at one end but closed at the other,
are each 1.09 m long. One is now lengthened by 2.20 cm .
Find the frequency of the beat they produce when playing together
in their fundamental.
unit=Hz
Two organ pipes
2012-12-01 1:29 am
回答 (1)
2012-12-01 7:50 am
✔ 最佳答案
Wavelength produced by the pipe before lengthening= 1.09 x 4 m = 4.36 m
Hence, frequency of fundamental note = 343/4.36 Hz = 78.67 Hz
[Take the speed of sound in air to be 343 m/s]
After lengthening, new wavelength = (1.09 + 0.022) x 4 m = 4.448 m
New frequency = 343/4.448 Hz = 77.11 Hz
Hence, beat frequency produced = (78.67 - 77.11) Hz = 1.56 Hz
收錄日期: 2021-04-13 19:08:57
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