An ambulance is driving towards the hospital at a velocity 94.0 km/h and emitting a steady 878-Hz sound from its siren. The sound reflects off the front of the hospital and is received by the same ambulance. In addition to it's own siren, the ambulance hears a shifted tone from the reflection at what frequency

Complete Question

An ambulance is driving towards the hospital at a velocity 94.0 km/h and emitting a steady 878-Hz sound from its siren. The sound reflects off the front of the hospital and is received by the same ambulance. In addition to it's own siren, the ambulance hears a shifted tone from the reflection at what frequency? The speed of sound on this day is 343 m/s

The frequency is

Explanation:

From the question we are told that

    The velocity of the ambulance  

    The frequency emitted is  

  The illustration of the process is shown on the first uploaded image

    The frequency at the hospital wall due to Doppler's effect  is mathematically repented as    

  Now as seen the frequency at the ambulance is mathematically represented as

Now substituting for

  Substituting value

The frequency is 1022.68 Hz

Explanation:

According the Doppler`s effect, the frequency is:

Where

fo = 878 Hz

v = velocity of sound = 343 m/s

v₀ = 94 km/h = 26.11 m/s

Replacing:

resonant frequency

your answer is c! hope this : )