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Questions  

If the velocity of sound in air is 336 m/s. The maximum length of a closed pipe that would produce a just audible sound will be 

a
3.2 cm
b
4.2 m
c
2.2 cm
d
1.2 m

detailed solution

Correct option is B

Minimum audible frequency = 20 Hz.  ⇒v4l=20⇒l=3364×20=4.2m

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Similar Questions

A tube of certain diameter and of length 48 cm is open at both ends. Its fundamental frequency of resonance is found to be 320 Hz. The velocity of sound in air is 320 m/s. One end of the tube is now closed, considering the effect of end correction, calculate the lowest frequency of resonance for the tube (in Hz). 


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