1.

Two closed organ pipes of length 100 cm and 101 cm 16 beats is 20 sec. When each pipe is sounded in its fundamental mode calculate the velocity of sound `A. `303ms^(-1)`B. `332ms^(-1)`C. `323.2ms^(-1)`D. `300ms^(-1)`

Answer» Correct Answer - C
Number of beats per second
`n=(16)/(20)=(4)/(5)impliesn=n_1-n_2=(v)/(4)((1)/(l_1)-(1)/(l_2))`
`implies(4)/(5)=(v)/(4)((1)/(1)-(1)/(1.01))=(0.01v)/(4xx1.01)`
`v=(16xx101)/(5)=323.2ms^-1`


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