Physics

Yadira Sutton

28 September, 15:00

Two fire trucks with sirens speeds towards and away from an observer. Which statement is true involving the Doppler effect observed by the observer?

A) the Doppler effect is not observed by the observer

B) Due to the Doppler effect, the fire truck traveling towards the observer is not heard

C) the fire truck traveling away from the observer produces a lower than normal apparent siren frequency

D) the fire truck traveling towards the observer produces a lower than normal apparent siren frequency