Wave Motion 3 Question 8

8. In a resonance tube experiment to determine the speed of sound in air, a pipe of diameter 5cm is used. The air column in pipe resonates with a tuning fork of frequency 480Hz when the minimum length of the air column is 16cm. Find the speed of sound in air at room temperature.

(2003, 2M)

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Answer:

Correct Answer: 8. 336m/s

Solution:

  1. Fundamental frequency, f=v4(l+0.6r)

Speed of sound v=4f(l+0.6r).

 or v=(4)(480)[(0.16)+(0.6)(0.025)]=336m/s



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