A piano tuner stretches a steel piano wire with a tension of 765 N}. The steel wire has a length of 0.900m and a mass of 6.75g
What is the number n of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to f = 16 kHz?
UNIVERSITY PHYSICS
2013-11-18 6:42 am
回答 (1)
2013-11-18 8:33 am
✔ 最佳答案
Mass pe runit length of the wire = (6.75/1000)/0.9 kg/m = 7.5 x 10^-3 kg/mHence, speed of wave on wire
= square-root[765/7.5x10^-3] m/s = 319.4 m/s
Wavelength formed on the wire
= 319.4/16000 m = 0.01996 m
No. of wavelength formed on the wire
= 0.9/0.01996
= 45
Therefore, no. of harmonics
= 45 x 2
= 90
收錄日期: 2021-04-21 22:44:29
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