a (a) Wave on a plucked string is stationary wave.
Light waves are $EM$ waves.
Water waves are transverse as well as longitudinal.
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A motorcyclist going around a circular track of radius $50\ m$ with a speed of $25\ m/s$ , is at a point $X$. A static siren at $Y$ is emitting sound of frequency $n$. How many times (approximately) in an hour will the motor cyclist hear the sound of actual frequency $Y$ ?
In a test of subsonic Jet flies over head at an altitude of $100\,\, m$. The sound intensity on the ground as the Jet passes overhead is $160 \,\,dB$. At what altitude should the plane fly so that the ground noise is not greater than $120\,\, dB.$
A rope of length $L$ and mass $M$ hangs freely from the ceiling. If the time taken by a transverse wave to travel from the bottom to the top of the rope is $T$, then time to cover first half length is
A whistle of frequency $500 Hz$ tied to the end of a string of length $1.2 m$ revolves at $400 \,rev/min$. A listener standing some distance away in the plane of rotation of whistle hears frequencies in the range (speed of sound $= 340 m/s$)
Two waves are propagating to the point $P$ along a straight line produced by two sources $A$ and $B$ of simple harmonic and of equal frequency. The amplitude of every wave at $P$ is $‘a’$ and the phase of $A$ is ahead by $\frac{\pi }{3}$ than that of $B$ and the distance $AP$ is greater than $BP$ by $50 cm.$ Then the resultant amplitude at the point $P$ will be, if the wavelength is $1$ meter
A tuning fork of unknown frequency makes $3\,beats/sec$ with a standard fork of frequency $384\,Hz$ . The beat frequency decreases when a small piece of wax is put on the prong of the first. The frequency of the fork is .... $Hz$
Two sources $A$ and $B$ are sounding notes of frequency $660 \,Hz$. $A$ listener moves from $A$ to $B$ with a constant velocity $u$. If the speed of sound is $330 \,m / s$, what must be the value of $u$ so that he hears $8$ beats per second is .......... $m / s$
A musician using an open flute of length $50\,cm$ produces second harmonic sound waves. A person runs towards the musician from another end of a hall at a speed of $10 \,km/h.$ If the wave speed is $330\,m/s,$ the frequency heard by the running person shall be close to...... $Hz$