Difference between revisions of "Density"
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| − | The '''density''' (symbol: '''''ρ''''') or, more strictly, '''mass density''', of a homogeneous system (or material) is the [[mass]] per unit [[volume]]. It is usually measured in grams per cubic centimetre ({{nowrap|g cm<sup>−3</sup>}}) for condensed phases (solids and liquids) and in kilograms per cubic metre ({{nowrap|kg m<sup>−3</sup>}}) for gases: {{nowrap|1 kg m<sup>−3</sup> =}} {{nowrap|1000 g cm<sup>−3</sup>}}. Densities of solids and liquids usually range from {{nowrap|0.62 g cm<sup>−3</sup>}} ([[isopentane]]) to {{nowrap|22.6 g cm<sup>−3</sup>}} ([[osmium]]); densities of gases at normal temperatures and pressures range from {{nowrap|0.085 kg m<sup>−3</sup>}} ([[hydrogen]]) to {{nowrap|13 kg m<sup>−3</sup>}} ([[tungsten hexafluoride]]). Density, unlike mass or volume, is an [[intensive property]] of a system. | + | The '''density''' (symbol: '''''ρ''''') or, more strictly, '''mass density''', of a homogeneous system (or material) is the [[mass]] per unit [[volume]]. It is usually measured in grams per cubic centimetre ({{nowrap|g cm<sup>−3</sup>}}) for condensed phases (solids and liquids) and in kilograms per cubic metre ({{nowrap|kg m<sup>−3</sup>}}) for gases: {{nowrap|1=1 kg m<sup>−3</sup> =}} {{nowrap|1000 g cm<sup>−3</sup>}}. Densities of solids and liquids usually range from {{nowrap|0.62 g cm<sup>−3</sup>}} ([[isopentane]]) to {{nowrap|22.6 g cm<sup>−3</sup>}} ([[osmium]]); densities of gases at normal temperatures and pressures range from {{nowrap|0.085 kg m<sup>−3</sup>}} ([[hydrogen]]) to {{nowrap|13 kg m<sup>−3</sup>}} ([[tungsten hexafluoride]]). Density, unlike mass or volume, is an [[intensive property]] of a system. |
==Notes and references== | ==Notes and references== | ||
Revision as of 03:17, 4 April 2011
The density (symbol: ρ) or, more strictly, mass density, of a homogeneous system (or material) is the mass per unit volume. It is usually measured in grams per cubic centimetre (g cm−3) for condensed phases (solids and liquids) and in kilograms per cubic metre (kg m−3) for gases: 1 kg m−3 = 1000 g cm−3. Densities of solids and liquids usually range from 0.62 g cm−3 (isopentane) to 22.6 g cm−3 (osmium); densities of gases at normal temperatures and pressures range from 0.085 kg m−3 (hydrogen) to 13 kg m−3 (tungsten hexafluoride). Density, unlike mass or volume, is an intensive property of a system.
Notes and references
Notes
References
External links
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See also the corresponding article on Wikipedia. |
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