Topic 1.8 - Pressure Flashcards Preview

Physics > Topic 1.8 - Pressure > Flashcards

Flashcards in Topic 1.8 - Pressure Deck (7)
Loading flashcards...
1

Give the equation for pressure 

Pressure = force/area

2

What are the units for pressure?

Pascals, Pa

3

Give the equation for pressure at different depths of a fluid

pressure (Pa) = depth (m) x density (kg/m3) x gravitational field strength 

4

What does an object in a fluid experience as a result of pressure?

Forces at right angles to all of its surfaces

5

Describe a simple mercury barometer

Atmospheric pressure balances a column of mercury, so its height can be meausred to give an indication of pressure.

6

What is a manometer?

A device used for measuring pressure

7

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.