An open organ pipe is 0.330 m long and is filled with an unknown gas. Its fundamental frequency is 860 Hz. a) What is the speed of sound in the unknown gas? b)  What is the density of the unknown gas? The speed of sound in air is 340 m/s and the density of air is 1.20 kg/m°. You can assume that the bulk modulus of the unknown gas is the same as the bulk modulus of air.

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
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Chapter18: Superposition And Standing Waves
Section: Chapter Questions
Problem 73PQ: A pipe is observed to have a fundamental frequency of 345 Hz. Assume the pipe is filled with air (v...
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An open organ pipe is 0.330 m long and is filled with an unknown gas. Its fundamental frequency is 860 Hz. a) What is the speed of sound in the unknown gas? b)  What is the density of the unknown gas? The speed of sound in air is 340 m/s and the density of air is 1.20 kg/m°. You can assume that the bulk modulus of the unknown gas is the same as the bulk modulus of air. 

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