Topic 1.8 - Pressure Flashcards Preview

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Flashcards in Topic 1.8 - Pressure Deck (7)
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Give the equation for pressure 

Pressure = force/area


What are the units for pressure?

Pascals, Pa


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.