For research purposes a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse of sound. The period of this sound is 68.4 ms. Determine the wavelength of the sound.

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- Mar 1st 2008, 07:32 PMlovinhockey26wavelength of a buoy
For research purposes a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse of sound. The period of this sound is 68.4 ms. Determine the wavelength of the sound.

- Mar 2nd 2008, 12:33 AMearboth
Let p denote the time of one period. Then

$\displaystyle f = \frac1p$ . Plug in the value of p and you'll get

$\displaystyle f = 14.62 \ \frac1s$

I take the value of the sound speed in water from my previous post. From

$\displaystyle f \cdot l = 1485\ \frac ms~\implies~ 14.62 \ \frac1s \cdot l = 1485\ \frac ms$ you can calculate l.

(For confirmation only: 101.6 m)