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Halliday 2 Cap 18 - P18 046

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    December 2018

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46. The Doppler effect formula, Eq. 18-47, and its accompanying rule for choosing ± signs, are discussed in §18-8. 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