Study notes
Pressure
Pressure as force spread over an area, density as mass per volume, how pressure in a liquid depends on depth, and how enclosed fluids transmit pressure equally in hydraulic systems and manometers.
What this topic covers
- Pressure is force spread over an area
- A smaller area gives a greater pressure for the same force
- Density is mass per unit volume
- Pressure in a liquid depends on depth, density and gravity
- An enclosed fluid transmits pressure equally in all directions
- Atmospheric pressure can be measured by a liquid column's height
- A manometer measures a pressure difference
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