ch16-p047 - 47. (a) The resonant wavelengths are given by =...

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with n + 1. That is, f 1 = nv /2 L is the lower frequency and f 2 = ( n + 1) v /2 L is the higher. The ratio of the frequencies is 2 1 1 . fn f n + = The solution for n is 1 21 315 Hz 3. 420 Hz 315 Hz f n ff == = −− The lowest possible resonant frequency is f = v /2 L = f 1 / n = (315 Hz)/3 = 105 Hz. (b) The longest possible wavelength is λ = 2 L . If f is the lowest possible frequency then v = λ f = 2 Lf = 2(0.75 m)(105 Hz) = 158 m/s. 47. (a) The resonant wavelengths are given by
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This note was uploaded on 04/16/2011 for the course PHYSICS 191262 taught by Professor Najafzadeh during the Spring '09 term at The Petroleum Institute.

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