Liquid pressure

• Liquid pressure at the bottom of a liquid column can be calculated by using the equation: Pressure (Pa)= height of column (m) x density of liquid (kg/m cubed) x gravitational field strength (10 N/kg on earth)
• Pressure = force / area
• You can find the pressure difference between 2 depths by subtracting the smaller pressure from the larger pressure
• In water the pressure is water pressure but in air the pressure is atmospheric presssure
• The deeper an object is, the greater the weight pressing down on it.
• The deeper an object is, the greater the weight pressing down on it.
• If we have a cylinder full of fluid with a piston inside, then if we push down on the piston, the pressure will increase everywhere within the container.
• When there are two liquids next to each other they exert forces on one another due to their different densities.