A dolphin swims directly at a reef in the water of low visibility, using its echolocation by sending out sound ahead of it at a frequency of 1900Hz. The combination of the emitted sound and the echoed sound produces “beats” that the dolphin hears 8 times per second. Find the speed of the dolphin. The speed of sound in sea water is approximately 1550 m/s.

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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A dolphin swims directly at a reef in the water of low visibility, using its echolocation by sending out sound ahead of it at a frequency of 1900Hz. The combination of the emitted sound and the echoed sound produces “beats” that the dolphin hears 8 times per second.
Find the speed of the dolphin. The speed of sound in sea water is approximately 1550 m/s.

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