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Glossary Science & Engineering

Density

Density is mass per unit volume, `ρ = m / V`; it tells you how tightly matter is packed.

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In more detail

54 g of aluminium filling 20 cm³ has a density of 2.7 g/cm³. Water is about 1 g/cm³, so objects denser than that sink. Density depends on temperature.

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See also

  • Glossary Mass and weight
    Mass is the amount of matter in an object; weight is the force gravity exerts on that mass, `W = m × g`.
  • Glossary Molarity
    Molarity is the concentration of a solution: moles of solute per litre of solution, written M.
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