A string of length $1\ m$ fixed at both ends is vibrating in $3^{rd}$ overtone. Tension in string is $200\ N$ and linear mass density is $5\ gm/m$ . Frequency of these vibrations is ..... $Hz$
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If two waves of same frequency and same amplitude respectively, on superimposition produced a resultant disturbance of the same amplitude, the waves differ in phase by
An engine giving whistle is moving towards a stationary observer with $110\,m/s$ speed. What will be the ratio of the frequency of the whistle heard when the engine is approaching and receding from the observer? (the speed of sound is $330\,m/s$ )
A granite rod of $60\ cm$ length is clamped at its middle point and is set into longitudinal vibrations. The density of granite is $2.7 \times 10^3 $ $kg/m^3$ and its Young's modulus is $9.27 \times 10^{10}$ $Pa$ What will be the fundamental frequency of the longitudinal vibrations .... $kHz$ ?
A tuning fork and a sonometer wire were sounded together and produce $4$ beats per second. When the length of sonometer wire is $95 cm$ or $100 cm,$ the frequency of the tuning fork is ..... $Hz$
The driver of a car travelling with speed $30 \,m / s$ towards a hill sounds a horn of frequency $600 \,Hz$. If the velocity of sound in air is $330 \,m / s$, the frequency of reflected sound as heard by driver is ........ $Hz$
Three waves of equal frequency having amplitudes $10\mu m,$ $4\mu m,$ $7\mu m$ arrive at a given point with successive phase difference of $\frac{\pi }{2},$ the amplitude of the resulting wave in $\mu m$ is given by
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 $Y$ ?