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19 December, 04:46

A mandolin string's first harmonic is 392 Hz. How long is the string if the wave speed on it is 329 m/s?

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  1. 19 December, 07:46
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    Velocity is given by:

    velocity=wavelength*frequency

    We note that the wavelength of a wave is twice the length of the string (2w) in the first harmonic.

    velocity=329 m/s

    wavelength=2w

    frequency=392

    substituting the values in our equation we get:

    329=2w (392)

    329=784w

    solving for w we get

    w=329/784

    w = 0.41964~0.42 m
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