A car is moving with a velocity of 5 m//...

A car is moving with a velocity of `5 m//s` towards huge wall. The driver sounds a horn of frequency `165 Hz`. If the speed of sound in air is `335 m//s`, the number of beats heard per second by the driver is

`6`

`5`

`4`

`3`

Text Solution

Verified by Experts

The correct Answer is:

Frequency of reflected sound
`f_(r ) = f((v+u)/(v-u)) = 165((335+5")/(335-5)) = 170 Hz`
Beta freuqency `= f_(r) - f = 170 - 165 = 5 Hz`

Topper's Solved these Questions

SOUND WAVES
CP SINGH|Exercise Exercises|130 Videos
SIMPLE HARMONIC MOTION
CP SINGH|Exercise Exercises|125 Videos
TEMPERATURE AND THERMAL EXPANSION
CP SINGH|Exercise EXERCISES|64 Videos

Similar Questions

Explore conceptually related problems

A bus is moving with a velocity of 5 ms^(-1) towards a huge wall. The driver sound a horn of frequency 165 Hz. If the speed of sound in air is 335 ms^(-1) , the number of beats heard per second by a passenger inside the bus will be

a bus is moving with a velocity 4 m/s towards a wall, the driver sounds a horn of frequency 173 Hz . if the speed of sound in air is 350 m/s. the number of beat heard per second by a passanger on the bus will be

A car is moving with a constant velocity 10 m//s towards the stationary wall. The car blows a horn of frequency 320 Hz . The velocity of sound in air is 330 m//s . The beats frequency received by the observer is

The driver of a car travelling with a speed of 30 m/s towards a wall sounds a siren of frequency 500 Hz. If the velocity of sound in air is 330 m/s, then the frequency of the sound reflected from the wall and as heard by the driver is

The driver of a car travelling with speed 30ms^-1 towards a hill sounds a horn of frequency 600 Hz. If the velocity of sound in air is 330ms^-1 , the frequency of reflected sound as heard by driver is

A police car with a siren of frequency 8 KHz is moving with uniform velocity 36 Km//hr towards a ball building which reflects the sound waves. The speed of sound in air is 320 m//s . The frequency of the siren heard by the car driver is

A car is moving along X-axis with a velocity v=20m//s . It sounds a whistle of frequency 660 Hz. If the speed of sound is 340m//s . The apparent frequency heard by the observer O (shown in figure) is:

CP SINGH-SOUND WAVES-Exercises

A train has just completed a U-curve in a trach which is a semi circle...
Text Solution
|
A man is standing on a railway platform listening to the whistle of an...
Text Solution
|
A car is moving with a velocity of 5 m//s towards huge wall. The drive...
Text Solution
|
A whistle revolves in a circle with an angular speed of 20 rad//sec us...
Text Solution
|
A police car moving at 22m//s, chases motorcyclist. The police man so...
Text Solution
|
A train moves towards a stationary observer with speed 34 m//s. The tr...
Text Solution
|
A siren placed at a railway platform is emitting sound of frequency 5 ...
Text Solution
|
A racing car moving towards a cliff, sounds its horn. The driver obser...
Text Solution
|
A vehicle , with a horn of frequency n is moving with a velocity of 30...
Text Solution
|
Two cars are moving on two perpendicular road towards a crossing with ...
Text Solution
|
A band playing music at a frequency f is moving towards a wall at a sp...
Text Solution
|
A sound wave of frequency f travels horizontally to the right. It is r...
Text Solution
|
A motor cycle starts from rest and accelerates along a straight path a...
Text Solution
|
A star is moving away from the earth with a velocity of 100 km//s. If ...
Text Solution
|
The apparent wavelength of the light from a star, moving away from the...
Text Solution
|
The frequency of a radar is 780 MHz. After getting reflected from an a...
Text Solution
|
Define Mach number
Text Solution
|
The musical interval between two tones of frequencies 320 Hz and 240 H...
Text Solution
|
The time of reverberation of a room A is one second. What will be the ...
Text Solution
|
If T is the reverberation time of an auditorium of volume V then
Text Solution
|