5. An ultrasonic beam of 1 cm wavelength is sent by a ship, returns from the sea-bed after 2 seconds. If velocity of ultrasonic beam in sea-water is vo-1510 m/s at 0°C, its salinity at T-30°C is S-29 gm/lit. Calculate the depth of sea at T-30°C and frequency of ultrasonic beam given the velocity in terms S and T is velocity v = vo + 1.14S +4.21T-0.037T2.
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