A stopped pipe 1.00 m in length is filled with helium at20°C (speed of sound 999 m/s). When the helium in this pipe vibratesat its third harmonic frequency, it causes the air at 20C (speed ofsound 344 m/s) in a nearby open pipe to vibrate at its fifth harmonicfrequency. What are the frequency and wavelength of the sound wave(a) in the helium in the stopped pipe and (b) in the air in the openpipe? (c) What is the length of the open pipe?

A stopped pipe 1.00 m in length is filled with helium at20°C (speed of sound 999 m/s). When the helium in this pipe vibratesat its third harmonic frequency, it causes the air at 20C (speed ofsound 344 m/s) in a nearby open pipe to vibrate at its fifth harmonicfrequency. What are the frequency and wavelength of the sound wave(a) in the helium in the stopped pipe and (b) in the air in the openpipe? (c) What is the length of the open pipe?

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Question

A stopped pipe 1.00 m in length is filled with helium at
20°C (speed of sound 999 m/s). When the helium in this pipe vibrates
at its third harmonic frequency, it causes the air at 20C (speed of
sound 344 m/s) in a nearby open pipe to vibrate at its fifth harmonic
frequency. What are the frequency and wavelength of the sound wave
(a) in the helium in the stopped pipe and (b) in the air in the open
pipe? (c) What is the length of the open pipe?

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