Question

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A siren emitting a sound of frequency 2000Hz moves away from you towards a cliff at a speed of 8m/s.

a) what is the frequency of the sound you hear coming directly from the siren.

b) what is the frequency of sound you hear reflected off the cliff.speed of sound in air is 330m/s.​

Answer 1

a) 971Hz,1031Hz,60Hz

b) A siren emitting a sound of frequency 1000 Hz moves away from you toward the face of a cliff at a speed of 10 m/s. Take the speed of sound in air as 330 m/s.