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A steel tube of length 1.00 m is struck ...

A steel tube of length 1.00 m is struck at one end. A person with his er close to the othr end hears the sound of the blow twice one travelign through the body of the tube and the other through the air in the tube. Find the time gap between the two hearings. Use the table in the next for speeds of sound in various substances.

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The correct Answer is:
B
`V_(air)=330 m/s, V=5200m/s`
Here, `s=7`m
So, `t=t_1-t_2=(1/330-1/5200)`
`=2375xx10^-3sec`
`=2.75ms`
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HC VERMA-SOUND WAVES-Exercises
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  17. A source of sound operates at 2.0 kHz, 20 W emitting sound uniformly...

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