You are standing still. What frequency do you detect if a fire engine whose siren emits at

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You are standing still. What frequency do you detect if a fire engine whose siren emits at 1550 Hz moves at a speed of 32m/s?
(a) Toward you, or
(b) Away from you?
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College Physics

ISBN: 978-0321601834

7th edition

Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

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