A stationary siren produces a sound of frequency 1200 Hz

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

A stationary siren produces a sound of frequency 1200 Hz. An observer in a car drives directly away from the siren at 15 m/s. The speed of sound is 340 m/s. Determine the frequency the driver hears.

Related theory

Doppler Effect
The Doppler effect
Speed of a longitudinal wave (speed of sound)
Waves

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