Two tuning forks have frequencies $450\, Hz$ and $454\, Hz$ respectively. On sounding these forks together, the time interval between successive maximum intensities will be .... $sec$
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(a) The time interval between successive maximum intensities will be
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A source of frequency $150 Hz$ is moving in the direction of a person with a velocity of $110\, m/s$. The frequency heard by the person will be .... $Hz$ (speed of sound in medium $= 330 m/s$)