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- Density abstract "The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho). Mathematically, density is defined as mass divided by volume:where ρ is the density, m is the mass, and V is the volume. In some cases (for instance, in the United States oil and gas industry), density is loosely defined as its weight per unit volume, although this is scientifically inaccurate – this quantity is more specifically called specific weight.For a pure substance the density has the same numerical value as its mass concentration.Different materials usually have different densities, and density may be relevant to buoyancy, purity and packaging. Osmium and iridium are the densest known elements at standard conditions for temperature and pressure but certain chemical compounds may be denser.To simplify comparisons of density across different systems of units, it is sometimes replaced by the dimensionless quantity "relative density" or "specific gravity", i.e. the ratio of the density of the material to that of a standard material, usually water. Thus a relative density less than one means that the substance floats in water.The density of a material varies with temperature and pressure. This variation is typically small for solids and liquids but much greater for gases. Increasing the pressure on an object decreases the volume of the object and thus increases its density. Increasing the temperature of a substance (with a few exceptions) decreases its density by increasing its volume. In most materials, heating the bottom of a fluid results in convection of the heat from the bottom to the top, due to the decrease in the density of the heated fluid. This causes it to rise relative to more dense unheated material.The reciprocal of the density of a substance is occasionally called its specific volume, a term sometimes used in thermodynamics. Density is an intensive property in that increasing the amount of a substance does not increase its density; rather it increases its mass.".
- Density thumbnail Artsy_density_column.png?width=300.
- Density wikiPageExternalLink ?sub=1&brch=1&sim=2&cnt=9.
- Density wikiPageExternalLink DIPPR105CalculationCGI.exe.
- Density wikiPageExternalLink room-temperature.
- Density wikiPageExternalLink waterdensitycalc.php.
- Density wikiPageExternalLink EdExp1.pdf.
- Density wikiPageExternalLink density_eletrolyte.php.
- Density wikiPageExternalLink field-density-test.html.
- Density wikiPageExternalLink liquid-density.
- Density wikiPageExternalLink gas-density.
- Density wikiPageExternalLink water-density-specific-weight-d_595.html.
- Density wikiPageExternalLink densities.html.
- Density wikiPageExternalLink scielo.php?pid=S0717-97072008000100015&script=sci_arttext.
- Density wikiPageExternalLink PTelements.asp?s=Density.
- Density wikiPageExternalLink ConvDensi.htm.
- Density wikiPageExternalLink 13_4388_3960.pdf.
- Density wikiPageExternalLink watch?v=96NFH2Z7GSA.
- Density wikiPageExternalLink watch?v=eY-44iPSWIU.
- Density wikiPageID "8429".
- Density wikiPageRevisionID "606110728".
- Density bgcolour "{default}".
- Density hasPhotoCollection Density.
- Density name "Density".
- Density symbols "ρ".
- Density unit "kg/m3".
- Density subject Category:Density.
- Density subject Category:Physical_quantities.
- Density comment "The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho). Mathematically, density is defined as mass divided by volume:where ρ is the density, m is the mass, and V is the volume.".
- Density label "Densidad".
- Density label "Densidade".
- Density label "Density".
- Density label "Densità".
- Density label "Dichte".
- Density label "Dichtheid (natuurkunde)".
- Density label "Gęstość".
- Density label "Masse volumique".
- Density label "Плотность".
- Density label "كثافة".
- Density label "密度".
- Density label "密度".
- Density sameAs Hustota.
- Density sameAs Dichte.
- Density sameAs Πυκνότητα.
- Density sameAs Densidad.
- Density sameAs Dentsitate_(fisika).
- Density sameAs Masse_volumique.
- Density sameAs Massa_jenis.
- Density sameAs Densità.
- Density sameAs 密度.
- Density sameAs 밀도.
- Density sameAs Dichtheid_(natuurkunde).
- Density sameAs Gęstość.
- Density sameAs Densidade.
- Density sameAs m.02btf.
- Density sameAs Q29539.
- Density sameAs Q29539.
- Density wasDerivedFrom Density?oldid=606110728.
- Density depiction Artsy_density_column.png.
- Density isPrimaryTopicOf Density.