Question

Find the depth of sea water from a ship on the sea surface it the time interval of two seconds is required to receive the signal back. Given that: temperature of sea water is 20℃, salinity of sea water is 10gm/lit. 

Answer 1

Given Data  :-t=2sec , Temperature=20℃,
                     S=10gm/lit =10kg/m³

Formula :-d=`(ϑt)/2`

                ϑ= 1510 +1.14S + 4.21t -0.037t²

Calculations :- ϑ=1510+ + -(1.14×10) + (4.21×20) - 0.037 (20)²

                      ϑ=1590 .8m/s

                   ` D = (1590.8)/2 =1590.8 m`

Answer    :-   Depth  of  sea  water=1590.8m