Pressure Flashcards
1
Q
What is pressure
A
Pressure is defined as the force acting per unit area
2
Q
Formula for pressure, SI unit
A
p = F/A
pressure = Force/Area
SI unit: Nm^2/Pa
3
Q
Formula for pressure in liquids
A
p = h>g
pressure = height x density x gravitational force
3
Q
Barometer (skip to answer)
A
Atmospheric pressure can be expressed as the height of the mercury column instead of in Pa
4
Q
Manometer (skip to answer)
A
-Manometer is an instrument used to measure differences in the pressure of gases or liquids
-When the manometer is not connected to a gas supply, both sides are open and acted on by atmospheric pressure only. Therefore, they have equal heights
