Question

The sound emitted from the siren of an
ambulance has frequency of 1500 Hz.
The speed of sound is 340 m/s. Calculate
the difference in frequencies heard by
a stationary observer it the ambulance
initially. travels towards and then away
from the observer at a speed of 30 m/s.
​

Answer 1

v= f λ => 340/1500 = λ => λ = 0.22