A person driving car at a constant speed of $15\,m / s$ is approaching a vertical wall. The person notices a change of $40\,Hz$ in the frequency of his car's horn upon reflection from the wall. The frequency of horn is ............ $Hz$. (Given : Speed of sound : $330\,m / s$ )
JEE MAIN 2023, Diffcult
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1Two cars $A$ and $B$ are moving away from each other in opposite directions. Both the cars are moving with a speed of $20\, ms^{-1}$ with respect to the ground. If an observer in car $A$ detects a frequency $2000\, Hz$ of the sound coming from car $B$, what is the natural frequency of the sound source of car $B$ .... $Hz$ ? (speed of sound in air $= 340\, ms^{-1}$)View Solution
- 2The equation of travelling wave is $y=a \sin 2 \pi\left(p t-\frac{x}{5}\right)$. Then the ratio of maximum particle velocity to wave velocity is ...........View Solution
- 3The fundamental frequency of a closed pipe is $220 Hz$. If $\frac{1}{4}$ of the pipe is filled with water, the frequency of the first overtone of the pipe now is ..... $Hz$View Solution
- 4The temperature at which the speed of sound in air becomes double of its value at ${0^o}C$ is ...... $K$View Solution
- 5The equation of a progressive wave is $y = 8\sin \left[ {\pi \left( {\frac{t}{{10}} - \frac{x}{4}} \right) + \frac{\pi }{3}} \right]$. The wavelength of the wave is .... $m$View Solution
- 6View SolutionIf source and observer both are relatively at rest and if speed of sound is increased then frequency heard by observer will
- 7A progressive wave travelling in positive by $x-$ direction given by $y = a\, sin (kx -\omega t)$ meets fixed end at $x = 0$. The reflected wave may be given byView Solution
- 8Two factories are sounding their sirens at $800\, Hz$ . A man goes from one factory to other at a speed of $2\,m/s$. The velocity of sound is $320\, m/s$. The number of beats heard by the person in one second will beView Solution
- 9A 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 isView Solution
- 10First overtone frequency of a closed organ pipe is equal to the first overtone frequency of an open organ pipe. Further nth harmonic of closed organ pipe is also equal to the mth harmonic of open pipe, where $n$ and $m$ are:View Solution