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Flashcards in deck_9090369 Deck (8)
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1
Q

<p>Give the equation for pressure</p>

A

<p>Pressure = force/area</p>

2
Q

<p>What are the units for pressure?</p>

A

<p>Pascals, Pa</p>

3
Q

<p>Why does pressure in a fluid increases with depth</p>

A

<p>The pressure in a fluid increases, because it is caused by the gravitational force of the fluid above that point</p>

4
Q

<p>Give the equation for pressure at different depths of a fluid</p>

A

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

5
Q

<p>What does an object in a fluid experience as a result of pressure?</p>

A

<p>Forces at right angles to all of its surfaces</p>

6
Q

<p>Describe a simple mercury barometer</p>

A

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

7
Q

<p>What is a manometer?</p>

A

<p>A device used for measuring pressure</p>

8
Q

<p>Describe how manometers measure pressure</p>

A

<p>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.</p>