Understanding Pressure in Liquid

1. At the same level or depth, the liquid pressure must be the same, otherwise liquid 

    will flow to equalize any pressure differences.  

2. This confirms the fact that the pressure in a liquid :

• depends on vertical depth
• is dependent of the shape and cross-sectional area of the containing vessel 

 3. Pressure in a liquid : 

•  acts equally in all directions at any point 
•  increases with depth                                                                                    
• increases with density

Formula

where:

P = liquid pressure

g = gravity at the surface of overlaying material

ρ = density of liquid

h = height of liquid column or depth within a substance