A longitudinal sound wave given by

PHYSICS · Single correct · ISC · Physics · Oscillations and Waves · Oscillations and Waves

Problem

p=2.5\sin\left[\frac{\pi}{2}(x-600t)\right]

, where

p

is in

\text{N m}^{-2}

x

is in metres, and

t

is in seconds, is sent down a closed organ pipe. If the pipe vibrates in its second overtone, the length of the pipe is (1)

6\,\text{m}

(2)

8\,\text{m}

(3)

5\,\text{m}

(4)

10\,\text{m}