The speed of a wave in a certain medium is $960\, m/s$. If $3600$ waves pass over a certain point of the medium in $1\, minute$, the wavelength is .... $metres$
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A tuning fork of frequency $340\,\, Hz$ is vibrated just above a cylindrical tube of length $120 \,\,cm$. Water is slowly poured in the tube. If the speed of sound is $340\,\, ms^{-1}$ then the minimum height of water required for resonance is .... $cm$
Two trains move towards each other with the same speed. The speed of sound is $340 \;m / s$. If the height of the tone of the whistle of one of them heard on the other changes $9 / 8$ times, then the speed of each train should be ........... $m/sec$
The number of possible natural oscillations of air column in a pipe closed at one end of length $85 \,\,cm$ whose frequencies lie below $1250\,\, Hz$ are (Velocity of sound $= 340 \,\,m s^{-1}$)
A metal wire of linear mass density of $9.8\, g/m$ is stretched with a tension of $10 kg$ weight between two rigid supports $1$ metre apart. The wire passes at its middle point between the poles of a permanent magnet, and it vibrates in resonance when carrying an alternating current of frequency $n.$ The frequency $n$ of the alternating source is ..... $Hz$
An observer is approaching with a speed $v$, towards a stationary source emitting sound waves of wavelength $\lambda_0$. The wavelength shift detected by the observer is (Take $c=$ speed of sound)
A boy is walking away from a wall towards an observer at a speed of $1\, metre/sec$ and blows a whistle whose frequency is $680 Hz.$ The number of beats heard by the observer per second is (Velocity of sound in air $= 340\, metres/sec$)