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A siren emitting a sound of frequency 1100 Hz moves away from you toward the face...

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Physics

A siren emitting a sound of frequency 1100 Hz moves away fromyou toward the face of a cliff at a speed of 15 m/s. Take the speedof sound in air as 330 m/s.

(a) What is the frequency of the sound you hear coming directlyfrom the siren? (Give your answer to at least one decimal place.)Hz

(b) What is the frequency of the sound you hear reflected offthe cliff? (Give your answer to at least one decimal place.) Hz

(c) What is the beat frequency between the two sounds?

Hz Is it perceptible (less than 20 Hz)? Yes, No

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