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If the seventh and fourth standing wave frequencies of a string differ by 144 Hz, what is the fundamental frequency of the string?

  • Physics - ,

    the fourth standing wave frequency is 4*f1, where f1 is the fundamental wave frequency. The seventy fundamental frequency is 7*f1

    7*f1 - 4*f1 = 3*f1 = 144 hz

    f1 = 144/3

  • Physics - ,

    This is not correct. The answer is simply as follows:

    Let f* be the fundamental frequency.

    Then f*[(1/4)-(1/7)]=144Hz.

    f* = 1344 Hz

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