Question

You are driving West at 38 m s . Ahead of you is an ambulance traveling East (towards you) at 31 m s . You hear the ambulance siren at a frequency of 411 Hz. What is the actual frequency that the ambulance is emitting

Answer 1

The right answer is "335.18 Hz".

Step-by-step explanation:

Given:

Velocity of observer,

`v_0=38 \ m/s`

Velocity of source,

`v_s=31 \ m/s`

Frequency,

`f=411 \ Hz`

As we know,

⇒
`F=((v-v_0)/(v+v_s) )* f`

`=((343-38)/(343+31) )* 411`

`=((305)/(374) )* 411`

`=0.815* 411`

`=335.18 \ Hz`