What is the frequency of a tuning fork that produces a tone in an open pipe that

Question

What is the frequency of a tuning fork that produces a tone in an open pipe that is 25.0 cm long when the temperature is 20degree C? An organ pipe open at both ends is 1.23 m long. a) What is its fundamental frequency when the air temperature is 15degreeC? b) What are the frequencies of the next two harmonics produced? An organ pipe closed at one end is 0.76 m long. a) What is its fundamental frequency when the air temperature is 12degreeC? b) What are the frequencies of the next two harmonics produced? A flute acts as an open pipe and sounds a note with a pitch of 370 Hz at 15. What are the second, third, and fourth harmonics heard of this pitch? A clarinet acts as a closed pipe and sounds a note with a pitch of 370 Hz. What are the second, third, and fourth harmonics heard of this pitch?

Explanation / Answer

1.

V = speed of sound at 20 = 331.4 + (0.6) (20) = 343.4 m/s

L = length = 25 cm = 0.25 m

frequency is given as

f = V/(2L) = 343.4 /0.25 = 1373.6 Hz

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