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Unformatted text preview: 0.524 meter. 1d) v = f = (3.979 Hz)(0.524 m) = 2.083 m/s. 2) An 18‐wheeler truck has a horn on it that produces a HONK at 200 Hz. The truck is approaching a tunnel in a cliff at 55 miles per hour when the trucker blows the horn. What frequency of HONK will the trucker hear reflected back to him by the cliff? (You may assume that one mile = 1600 meters, and that the speed of sound in air is 340 m/s.) Solution The truck is moving at (55 mph)(1600 m/mi)(1 hr/3600 s) = 24.44 m/s. The frequency of sound that will hit the cliff is...
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- Winter '13