Pressure and density
- Created by: Ted Vanderhook
- Created on: 24-05-16 17:17
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- Pressure and Density
- DENSITY = MASS / VOLUME
- Density depends on what an object is made of - IT IS NOT THE SIZE OR SHAPE.
- Depends whether the object floats or sinks.
- Solid object will float if it has a LOWER density than the fluid.
- The Unit of density is - g/cm3 or kg/m3
- PRESSURE = FORCE / AREA
- The same force over a large area creates a LOWER pressure
- in Gases and Liquids (at rest) the pressure at any point acts equally in all directions
- In gases and liquids, the pressure increases with depth, eg High pressure at lowest point in earth, lower pressure in the atomsphere
- Pressure is measured in Pascals Pa or kilopascals kPa
- Pressure Difference = height x density x g
- DENSITY = MASS / VOLUME
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