What factors do liquid pressure does ot depend on?

Answer 1

For liquids in containers (liquids in static conditions), the pressure in the liquid will

depend on the pressure at liquid-vapor interface, the density of the liquid and the

depth measured from the liq-vap interface down.

As an example let's assume we want to know the hydrostatic pressure in the ocean at a depth of 150 m.

We will assume:

An atmospheric (barometric) pressure of Po = 100 kPa (kilpascal).

Density of sea water of ρw = 1.03 x 103 kg/m3

Depth Δh = 150 m

Gravity acceleration g = 9.81 m/s2

Hydrostatic increment of pressure owed to depth Δh relation: ΔP = ρgΔh

Total pressure PT at a depth of Δh:

PT = Po + ρwgΔh = 100 x 103 Pa + !.03 x 103 kg/m3 ( 9.81 m/s2 )(150 m)

≈ 1 620 x 103 Pa ≈ 1 620 x 103 Pa [ 1 atm/101 325 Pa] ≈ 16.0 atm

The pressure increment we experiment at a depth of 150 m in the ocean is about 15 atmospheres (ΔP = ρgΔh).

Answer 2

Liquid pressure does not depend on the shape or size of the container holding the liquid, as long as the depth is the same. It also does not depend on the amount of liquid present, as long as the depth and density of the liquid remain constant.