9. [2pt] A pipe, oflength L = 0.320m and diameter d = 0.088m is open at both end
ID: 1727622 • Letter: 9
Question
9. [2pt] A pipe, oflength L = 0.320m and diameter d = 0.088m is open at both ends. Aloudspeaker is placed near one end and its frequency is varied.What is the second-lowest frequency for which the sound in the piperesonates? Assume 343m/s as the speed of sound in air. 10. [2pt] The air inanother pipe, of the same dimensionsbut with one end closed, is excited by the loudspeaker. What
is the second-lowest frequency for which this occurs? 9. [2pt] A pipe, oflength L = 0.320m and diameter d = 0.088m is open at both ends. Aloudspeaker is placed near one end and its frequency is varied.What is the second-lowest frequency for which the sound in the piperesonates? Assume 343m/s as the speed of sound in air. 10. [2pt] The air inanother pipe, of the same dimensions
but with one end closed, is excited by the loudspeaker. What
is the second-lowest frequency for which this occurs? 10. [2pt] The air inanother pipe, of the same dimensions
but with one end closed, is excited by the loudspeaker. What
is the second-lowest frequency for which this occurs?
Explanation / Answer
A pipe, of length L =0.320m and diameter d = 0.088m is open at both ends. A loudspeakeris placed near one end and its frequency is varied. What is thesecond-lowest frequency for which the sound in the pipe resonates?Assume 343m/s as the speed of sound in air.n=V/2l
so n=343/2*0.32=535.93Hz
second lowest frequency=2n=1071.87Hz
10. The air in anotherpipe, of the same dimensions
but with one end closed, is excited by the loudspeaker. What
is the second-lowest frequency for which thisoccurs?
n=V/4l
so n=343/4*0.32=267.965Hz
second lowest frequency=3*n=803.89Hz
10. The air in anotherpipe, of the same dimensions
but with one end closed, is excited by the loudspeaker. What
is the second-lowest frequency for which thisoccurs?
n=V/4l
so n=343/4*0.32=267.965Hz
second lowest frequency=3*n=803.89Hz
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