Physics, 03.12.2021 21:20 kealinwiley

Starting from rest, your friend dives from a high cliff into a deep lake below, yelling in excitement at the thrill of free-fall on her way down. You watch her as you stand on the lake shore immediately below, and at a certain instant your keen hearing recognizes that the usual frequency of her yell, which is 933 Hz, is shifted by 54.3 Hz.

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Starting from rest, your friend dives from a high cliff into a deep lake below, yelling in excitemen...