Question: A middle C note (262 Hz) is sounded on a piano to help tune a violin string. When the string is sounded, nine beats are

A middle C note (262 Hz) is sounded on a piano to help tune a violin string. When the string is sounded, nine beats are heard in 3.0 s.
(a) How much is the violin string off tune?
(b) Should the string be tightened or loosened to sound middle C?

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