Question

Atmospheric pressure at sea level is 101 kPa and the density of sea water is 1020 kgm^-3, therefore the total pressure 42 m underwater is:

A 420 kPa

B 521 kPa

C 4327 MPa

D 144 kPa

Answer 1

The total pressure 42 m underwater is

$$p=p_0+g\rho h\\ =101*10^3+9.8*1020*42\\ =5.21*10^5\:\rm Pa$$

Answer: B