a) A marine biologist uses a sonar system to find the depth of theocean at her l

Question

a) A marine biologist uses a sonar system to find the depth of theocean at her location. At that place the speed of sound in saltwater is 1530 m/s. There is a delay of 0.200 s between the sendingof a sound pulse and the detection of the echo. Calculate the oceandepth.
m
b) Asound wave has a frequency of 720. Hz in air and a wavelength of0.471 m. Calculate the temperature of the air.
oC



b) Asound wave has a frequency of 720. Hz in air and a wavelength of0.471 m. Calculate the temperature of the air.
oC

Explanation / Answer

Speed of sound v = 1530 m / s

Time interval t = 0.2 s

We know t = 2d / v

From this depth of ocean d = vt / 2

                                           = 153 m

(b). frequency f= 720 Hz

Wavelength = 0.471 m

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