d The mechanical waves on the surface of a liquid are both the transverse as well as the longitudinal waves.
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An observer is moving away from source of sound of frequency $100 Hz$. His speed is $33 \,m/s$. If speed of sound is $330 \,m/s$, then the observed frequency is .... $Hz$
A person is observing two trains one coming towards him and other leaving with the same speed $4\, m/s$. If their whistling frequencies are $240\, Hz$ each, then the number of beats per second heard by the person will be:(if velocity of sound is $320\, m/s$)
A metal rod of $1\; m$ length, is dropped exact vertically on to a hard metal floor. With an oscilloscope, it is determined that the impact produces a longitudinal wave of $1.2 \;k Hz$ frequency. The speed of sound in the metal rod is
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A tuning fork gives $4$ beats with $50 cm$ length of a sonometer wire. If the length of the wire is shortened by $1 cm$, the number of beats is still the same. The frequency of the fork is
A transverse sinusoidal wave of amplitude $a,$ wavelength $\lambda$ and frequency $n$ is travelling on a stretched string. The maximum speed of any point on the string is $v/10,$ where $v$ is the speed of propagation of the wave. If $a = {10^{ - 3}}\,m$ and $v = 10\,m{s^{ - 1}}$, then $\lambda$ and $n$ are given by
The pattern of standing waves formed on a stretched string at two instants of time (extreme,mean) are shown in figure. The velocity of two waves superimposing to form stationary waves is $360\ ms^{-1}$ and their frequencies are $256\ Hz$. Which is not possible value of $t$ (in $sec$)
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