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A pipe 0.420 m long and closed at one end is filled with an unknown gas. The third lowest harmonic frequency for the pipe is

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A pipe 0.420 m long and closed at one end is filled with an unknown gas. The third lowest harmonic frequency for the pipe is 790 Hz. (a) What is the speed of sound in the unknown gas? (b) What is the fundamental frequency for this pipe when it is filled with the unknown gas? (a) Number i Units m/s (b) Number i Units Hz V

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