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22 January, 10:15

What is true about the frequency and wavelength of this sound? A:The wavelength of the sound is 0.800 m. B: The wavelength of the sound is 2.72 m. C:The frequency of the sound is 125 Hz. D:The frequency of the sound is 425 Hz.

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  1. 22 January, 10:21
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    NB: This is the complete question

    A string of length 0.620 m is vibrating at 125 Hz in its second harmonic and producing sound that moves at 340 m/s.

    What is true about the frequency and wavelength of this sound?

    A:The wavelength of the sound is 0.80 m.

    B: The wavelength of the sound is 2.72 m.

    C:The frequency of the sound is 125 Hz.

    D:The frequency of the sound is 425 Hz.

    Answer:

    Explanation:

    let f1 = frequency of the first harmonic and

    f2 = frequency of the second harmonic

    f2 = 2f1

    f1 = 125/2

    f1 = 62.5 Hz

    f2 = speed / wavelength

    f2 = 340/125

    f2=2.72 m
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