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A 200 Hz wave with amplitude 1 mm travel...

A `200 Hz` wave with amplitude `1 mm` travels on a long string of linear mass density `6 g//m` keep under a tension of `60 N`.
(a) Find the average power transmitted across a given point on the string.
(b) Find the total energy associated with the wave in a `2.0 m` long portion of the string.

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