Write an expression for the pressure at a point inside a liquid. Explain the meaning of the symbols used.

The pressure at a point inside a liquid at a depth h

= Atmospheric pressure + pressure due to liquid column

= P₀ + hρg

where,

P₀ = atmospheric pressure acting on the free surface of liquid

h = depth of the point below the free surface

ρ = the density of the fluid

g = acceleration due to gravity.