An ambulance travels down a highway at a speed of 30 m/s. Itssiren emits sound at a frequency of 400 Hz. A car istraveling at a speed of 25 m/s in the opposite direction to theambulance. Assume that the speed of sound in air 343m/s.
What is the frequency heard by a passenger in the car as thecar approaches the ambulance?
What is the frequency heard by a passenger in the car as thecar moves away from the ambulance?