You made observations of the frequencies of the first six resonant modes of the

Question

You made observations of the frequencies of the first six resonant modes of the flame- tube in class. Its resonant frequencies do not agree with those that you will calculate in the previous problem, however, because the tube was filled with methane, not air. Using the observations you made, estimate the speed of sound in methane. (may make up length or leave in terms of variables) previous question: Suppose that the largest pipe in a pipe organ is 16 feet long, and the smallest pipe is 0.25 feet long. The speed of sound in air is 1125 feet per second. What are the fundamental frequencies of these two pipes?1

Explanation / Answer

velocity of sound in methane= 1463.25 m/s

f1= v/2l

F1=1463.25/(2x0.25)

f1=2926.5 Hz.

f2= v/2L

f2= 1463.25/(2*16)

f2= 45.7 Hz

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