Give the equation for pressure
Pressure = force/area
What are the units for pressure?
Give the equation for pressure at different depths of a fluid
pressure (Pa) = depth (m) x density (kg/m3) x gravitational field strength
What does an object in a fluid experience as a result of pressure?
Forces at right angles to all of its surfaces
Describe a simple mercury barometer
Atmospheric pressure balances a column of mercury, so its height can be meausred to give an indication of pressure.
What is a manometer?
A device used for measuring pressure
Describe how manometers measure pressure
They contain glass tube (in the shape of a U) filled with liquid (eg. mercury). It measures the difference in pressure between the fluids each arm is submerged in.