mass per unit of volume of a substance

  • for pure water the density is 1000 kg/m3
  • for seawater the density is usually more; the density increases with increasing salinity, and decreases with increasing temperature
  • for stone and sand, usually a density of 2600 kg/m3 is assumed; concrete is less dense, in the order of 2400 kg/m3; some types of basalt may reach up to 2800 kg/m3
  • for sand, including the voids, one may use 1600 kg/m3, while mud often has a density of 1100 – 1200 kg/m3