Home
Class 12
PHYSICS
A locomotive engine approaches a railway...

A locomotive engine approaches a railway station and whistes at a frequency of 400 Hz. A stationary observer on the platform observes a changes of 40 Hz. As the engine passed across him. If velocity of sound is 330 m/s. The speed of the engine is

A

`34m//s`

B

`40m//s`

C

`17m//s`

D

`20m//s`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

The apparent frequency of the whistle of an engine changes in the ratio 9 : 5 as the engine passes the stationary observer. If the velocity of sound is 350 ms^(-1) , then the speed of the engine is

The apparent frequency of the whistle of an engine changes in the ratio 6:5 as the engine passes a stationary observer. If the velocity of sound is 330(m)/(s) , then the velocity of the engine is

The apparent frequency of the whistle of an engine changes in the ratio 13 : 12 as the engine passes a stationary observer. If the velocity of sound is 350 m/s. The velocity of engine is

When an engine passes near to a stationary observer then its apparent frequencies occurs in the ratio 5/3. if the velocity of sound is 340 m/s then speed of engine is

An engine approaches a hill with a constant speed. When it is at a distance of 0.9 km, it blows a whistle whose echo is heard by the driver after 5 seconds. If the speed of sound in air is 330 m/s, then the speed of the engine is :

A whistle emitting a sound of frequency 450 Hz approaches a stationary observer at a speed of 33 m/s. Velocity of sound is 330 m/s. The frequency heard by the observer, in Hz, is :

The frequency of a car horn encountered a change from 400 Hz to 500 Hz. When the car approaches a vertical wall. If the speed of sound is 330 m/s. Then the speed of car is ______ km/h.

An observer is moving away from source of sound of frequency 100 Hz. His speed is 33 m/s. If speed of sound is 330 m/s, then the observed frequency is

The frequency of the whistle of an engine appears to drop to (2)/(3)rd of its actual value when it passes a stationary observer. Velocity of sound in air is 330 m/s then the speed of engine is

The ratio of the apparent frequencies of a car when approaching and receding a stationary observer is 11:9 What is the speed of the car, if the velocity of sound in air is 330 m/s?