1800-150-456-789
FlagBACK
Flag Wave Motion> The engine of a train approaching a stati...
question mark

The engine of a train approaching a station whistles at a frequency of 440 Hz. A stationary observer on the platform notices a change of 40 Hz in the frequency as the engine passes him. If the velocity of sound is 330 m/s, the speed of the train is

Varun Manhas , 7 Years ago
Grade 11
anser 1 Answers
Phanindra

Last Activity: 7 Years ago

We have one formula...
n' = n(V-Vobs)÷(V-Vsource)
Here,   V?obs  = 0 (since observer is at rest..)
V?source    = vel. Of train.....= ?
n'=40 hz  (given)
V=velocity of sound...=330 m/s  (given)
n=original frquency =440 hz (given) 
Now substitue the values to get V?source ....

Provide a better Answer & Earn Cool Goodies

star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Other Related Questions on wave motion

question mark
A particle on a speing executes shm when the particle is found at x=xmax/2 the speed of the partcle is 
A)vx=vmax 
B)vx=√3vmax/2
C)vx=√2vmax/2
D)vx=vmax/2
wave motion
0 Answer Available

Last Activity: 3 Years ago

question mark
displacement associated with three dimensional wave is given by sai x y is equal to 1 + 1 by 2 x + root 3 by 2 k x minus omega t show that the wave propagates along a direction making an angle 60 degree with the x-axis
wave motion
0 Answer Available

Last Activity: 3 Years ago

question mark
What do you mean by Energy of Simple Hormonic Motion?
 
wave motion
0 Answer Available

Last Activity: 3 Years ago

question mark
What is mean by motion and time define it's all types with there parts and their s.i. units.
wave motion
0 Answer Available

Last Activity: 3 Years ago

question mark
explain the effects of doppler effect in satellite communication
wave motion
0 Answer Available

Last Activity: 3 Years ago