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A ship in an ocean sends out an ultra sound whose echo is received after 3 seconds. If the wavelength of the ultra sound in water is 7.5 cm

      

A ship in an ocean sends out an ultra sound whose echo is received after 3 seconds. If the wavelength of the ultra sound in water is 7.5 cm, and the frequency of the transmitter is 20 kHz,determine the depth of the ocean.

  

Answers


John
V = f x wavelength = 20000Hz x 0.075m = 1500 but V = $\frac{d}{t}$ = $\frac{2d}{3}$ (echo)$\rightarrow$ 2d = 4500 $\rightarrow$ d = 2250 m
johnmulu answered the question on February 11, 2017 at 08:44


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