Pressure and density

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  • Pressure and Density
      • 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
      • 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


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