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A stationary source S generates circular outgoing waves on a lake. The wave speed is 5.0m/s and the crest-to-crest distance is 2.0m. A person in

A stationary source S generates circular outgoing waves on a lake. The wave speed is 5.0m/s and the crest-to-crest distance is 2.0m. A person in a motor boat heads directly toward S at 3/0m=s. To this person, what is the frequency of these waves?

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