“relative density”的概念、定义、翻译、参考文献-科学参考

relative density

Physics

The ratio of the density of a substance to the density of some reference substance. For liquids or solids it is the ratio of the density (usually at 20°C) to the density of water (at its maximum density). This quantity was formerly called specific gravity. Sometimes relative densities of gases are used; for example, relative to dry air, both gases being at s.t.p.

Chemistry

The ratio of the density of a substance to the density of some reference substance. For liquids or solids it is the ratio of the density (usually at 20°C) to the density of water (at its maximum density). This quantity was formerly called specific gravity. Sometimes relative densities of gases are used; for example, relative to dry air, both gases being at s.t.p.

Chemical Engineering

The ratio of the density of a substance to a reference substance. A substance with a relative density less than one is less dense than the reference; if greater than one then it is denser than the reference. If the relative density of the substance and reference substance is exactly the same, then the densities are equal; i.e. equal volumes of the two substances have the same mass. The temperature and pressure must be specified for both the sample and the reference. Compare specific density.

Biology

The ratio of the density of a substance to the density of some reference substance. For liquids or solids it is the ratio of the density (usually at 20°C) to the density of water (at its maximum density). This quantity was formerly called specific gravity.

单词	relative density
释义	relative density Physics The ratio of the density of a substance to the density of some reference substance. For liquids or solids it is the ratio of the density (usually at 20°C) to the density of water (at its maximum density). This quantity was formerly called specific gravity. Sometimes relative densities of gases are used; for example, relative to dry air, both gases being at s.t.p. Chemistry The ratio of the density of a substance to the density of some reference substance. For liquids or solids it is the ratio of the density (usually at 20°C) to the density of water (at its maximum density). This quantity was formerly called specific gravity. Sometimes relative densities of gases are used; for example, relative to dry air, both gases being at s.t.p. Chemical Engineering The ratio of the density of a substance to a reference substance. A substance with a relative density less than one is less dense than the reference; if greater than one then it is denser than the reference. If the relative density of the substance and reference substance is exactly the same, then the densities are equal; i.e. equal volumes of the two substances have the same mass. The temperature and pressure must be specified for both the sample and the reference. Compare specific density. Biology The ratio of the density of a substance to the density of some reference substance. For liquids or solids it is the ratio of the density (usually at 20°C) to the density of water (at its maximum density). This quantity was formerly called specific gravity.
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