Light and Sound
Light and Sound. Lecture 35 Reading : 15: 4-6 Problems: 15: 1, 4, 7, 13, 15, 17, 18. Quiz. v SOUND = 343 m/s The little bat in the ultrasonic ranger sends out a short 40 k hz pulse. It bounces of a target 1.7m away. How much time elapses before he hears the reflected echo?.
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