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Unformatted text preview: 46. The Doppler eﬀect formula, Eq. 1847, and its accompanying rule for choosing ± signs, are discussed in
§188. Using that notation, we have v = 343 m/s, vD = vS = 160000/3600 = 44.4 m/s, and f = 500 Hz.
Thus,
343 − 44.4
= 500 Hz =⇒ ∆f = 0 .
f = (500)
343 − 44.4 ...
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 Fall '08
 SPRUNGER
 Physics

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