Topic 1.8 - Pressure Flashcards
1
Q
Give the equation for pressure
A
Pressure = force/area
2
Q
What are the units for pressure?
A
Pascals, Pa
3
Q
Give the equation for pressure at different depths of a fluid
A
pressure (Pa) = depth (m) x density (kg/m3) x gravitational field strength
4
Q
What does an object in a fluid experience as a result of pressure?
A
Forces at right angles to all of its surfaces
5
Q
Describe a simple mercury barometer
A
Atmospheric pressure balances a column of mercury, so its height can be meausred to give an indication of pressure.
6
Q
What is a manometer?
A
A device used for measuring pressure
7
Q
Describe how manometers measure pressure
A
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.
