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Math Help - quick one regarding period/wavelength

  1. #1
    Member
    Joined
    Mar 2007
    Posts
    80

    quick one regarding period/wavelength

    Hi I have done the following calculation for

    1)For a sound wave that has a wavelength of 5 metres, what is the frequency of the sound? (Use 340m/sec as the speed of sound

    and

    2) For a frequency of 20Hz, what is the period ( T ) of the wave in seconds or milliseconds, and what is the wavelength in metres?

    I have ....


    1C) i.

    If (V = W * F) then (F= V/W)
    So...
    (F=V/W) > plugin values for wavelength and velocity > (F = 340/5)

    F = 68Hz

    1C)ii.

    Period (t) = (1/frequency) So... t = (1/20)
    t = 0.05 seconds
    Wavelength = (V/f) V= speed of sound (340 m/s)
    Wavelenght = (340 * 20)
    Wavelength = 6800


    Am I correct??
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  2. #2
    Junior Member
    Joined
    Mar 2009
    Posts
    66
    Yep, that all looks correct to me
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