Home
Class 12
PHYSICS
A source of sound emitting a note of fre...

A source of sound emitting a note of frequency 90 Hz moves towards an observer with speed equal to ` ( (1)/( 10 ) )^(th ) ` of velocity of sound.The frequency of the note heard by the observer will be

A

100 Hz

B

82 Hz

C

200 Hz

D

90 Hz

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

A car with a hom of frequency 620 Hz travels towards a large wall with a speed of 20 m//s . velocity of sound is 330 m//s . The frequency of echo of sound of hom as heard by the driver is

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 ms^(-1) . Then, the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air = 330 ms^(-1) )

A source of sound of frequency 512 Hz is placed inside water. The speed of sound in water is 1482 m s^(-1) and in air it is 320 m s^(-1) . The frequency of sound recorded by an observer who is standing in air is

When both source and listener approach each other with a velocity equal to half the velocity of sound, the change in frequency of the sound as detected by the listener is

A source of sound of frequency 750 Hz is placed inside water. The speed of sound in water is 1500 m//s and in air is 340 m//s . The frequency of sound recorded by an observer who is standing in air is

An engine blowing a whistle of frequency 133 Hz moves with a velocity of 60(m)/(s) towards a wall from which an echo is heard. Calculate the frequency of the echo heard by the driver. (velocity of sound in air in 340(m)/(s) .)

An engine blowing a whistle of frequency 133 Hz moves with a velocity of 60 ms^(-1) owards a hill from which an echo is heard. The frequency of the echo heard by the driver (Velocity of sound in air=340 ms^(-1) )

When source of sound moves towards a stationary observer, the wavelength of sound received by him

A person is standing on a railway platform. An engine blowing a whistle of frequency 640 Hz approaches him with a speed of 72 km//hr . The frequency of the note heard by the person is (velocity of sound is 340 m//s )

Calculate the velocity of sound if the frequency of the wave is 4 Hz and the wavelength of the wave is 80 meters.