density

• definition of density

  density of a substance is defined as mass per unit volume.
• p = $\frac{m}{v}$
• SI units are

  $kgm^{-3}$
• volume

  the volume of irregular solids can be found by putting the object into a known amount of water and finding out how much water had been displaced.

  the displaced water = volume of object

  
  

  Archimedes principle
• volume of regular

  can be found from the measurements