일반물리학 1 · Waves-II · Problem 11
일반물리학 1 — Waves-II: Problem 11
11 A bat is flitting about in a cave, navigating via ultrasonic bleeps. Assume that the sound emission frequency of the bat is 39 000 Hz. During one fast swoop directly toward a flat wall surface, the bat is moving at 0.020 times the speed of sound in air. What frequency does the bat hear reflected off the wall?
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