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A guitar string is 90 cm long and has a ...

A guitar string is 90 cm long and has a fundamental frequency of 124 Hz. Where should it be pressed to produce a fundamental frequency of 186 Hz?

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Sinc T is constant
we have `f prop (1)/(l) " " :. l_(2)=(f_(1))/(f_(2))l_(1)=(124)/(186)xx90=60 cm`
Thus, the string should be pressed at 60 cm from an end.
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