Pressure in Liquid

Pressure in Liquid

Pressure in liquid is due to the weight of the liquid acting on the surface of any objects in the liquid.

Formula: Pressure Caused by Liquid

P = Pressure
h = depth
ρ = density of liquid
g = Gravitational Field Strength

Formula: Pressure in Liquid

P = Pressure
P_atm = Atmospheric Pressure

h = Depth
ρ = Density of liquid
g = Gravitational Field Strength

Characteristic 1:

The pressure in a liquid increases with depth.

Characteristic 2:

The pressure at any point of a liquid acts equally in all direction.

Characteristic 3:

For a given liquid, the pressure at a point within it varies only with the vertical depth of the point below the surface of the liquid.

Pressure in liquid does not depends on
- the shape of the container.
- the size of the container.
- the area of its surface

Characteristic 4:

Pressure in liquid depends only on its vertical distance from the surface of the liquid.

Pressure at A = Pressure at B

Application: Construction of Dam

The wall of the dam is built thicker at the bottom to withstand a higher pressure.

The generator is placed at the lower part so that the pressure of the water is high enough to drive the turbine.

Application: Public Water Supply System

The water tower is built at high place so that the water has sufficient pressure to flow to consumer’s house.

Title 10

This is the card content