• Sound source moving right

• Approaching sound barrier

• Breaking sound barrier

Doppler Effect Questions

A 600 Hz sound is emitted from an ambulance travelling at 42 m/s North. A boy walking his dog is travelling south at

2 m/s. With what frequency does he hear the siren?

Doppler Effect Questions

A 600 Hz sound is emitted from an ambulance travelling at 42 m/s North. A boy walking his dog is travelling south at

2 m/s. With what frequency does he hear the siren?

691.32 Hz

• A train moving west emits a 740 hz sound. A person in a car at the train crossing hears the frequency of the sound at 758 hz. How fast is the train approaching the stationary car?

• A train moving west emits a 740 hz sound. A person in a car at the train crossing hears the frequency of the sound at 758 hz. How fast is the train approaching the stationary car?

• 7.86 m/s

• A thunderstorm is rolling in.

• The observed frequency of the thunder is 120 Hz. The storm is moving at 9 m/s East and the observer is standing still. The speed of sound is 331 m/s. What is the actual frequency of the storm?

• A thunderstorm is rolling in. • The observed frequency of the thunder is 120

Hz. The storm is moving at 9 m/s East and the observer is standing still. The speed of sound is 331 m/s. What is the actual frequency of the storm?

• 116.74 Hz