Find the pressure 200 m below the surface of the ocean if pressure on the free surface of liquid is one atmosphere. (Density of sea water = 1060 kg/m³ )

 After going through the question we can list some data as

height h=200m

density ρ = 1060 kg/m³

Atmospheric pressure P₀ = 1.013 x 10⁵ N/m²

acceleration due to gravity g = 9.8m/s²

To find, Pressure below 200m P = ?

Solution –

Absolute pressure ,

P = P₀ +  ρgh

P = 1.013 x 10⁵ + (1060 x 9.8 x 200)

P = 1.013 x 10⁵ + 20.776 x 10⁵

P = 21.789 x 10⁵ Pa

P = 2.1789 x 10⁶ Pa

P = 2.1789 MPa 

the pressure below 200m below the surface is 2.1789 x 10⁶ N/m = 2.1789 x 10⁶ Pa