Asked by casey

if you have and open end air column with a length of 75.0 cm and the fifth harmonic is 1175 hz, what is the fundamental frequency? what is the speed of the wave?
Answered by drwls
nL/4 = 75 (n = 1,3,5...)
First harmonic wavelength L = 300 cm
Second harmonic wavelength = 100
Third harmonic wavelength = 60 cm
Fourth harmonic wavelength = 42.9 cm
Fifth harmonic wavelength = 33.3 cm

Wave speed = L*frequency = 391 m/s
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