the ratio of the density of a substance to the density of a standard substance under specified conditions. For liquids and solids the standard is usually water at 4°C or some other specified temperature. For gases the standard is often air or hydrogen at the same temperature and pressure as the substance d See also specific gravity, vapour density
The ratio of the density of one substance to that of a reference substance, typically water. See more at specific gravity.
noun, Sociology. 1. the perception of an unfair disparity between one’s situation and that of others.
noun, Optics. 1. Abbe number. noun, Optics. 1. the reciprocal of the dispersive power of a substance.
noun, Statistics. 1. the ratio of the number of times an event occurs to the number of occasions on which it might occur in the same period. relative frequency noun 1. the ratio of the actual number of favourable events to the total possible number of events; often taken as an estimate of probability the […]
noun 1. the amount of water vapor in the air, expressed as a percentage of the maximum amount that the air could hold at the given temperature; the ratio of the actual water vapor pressure to the saturation vapor pressure. Abbreviation: RH, rh. relative humidity noun 1. the mass of water vapour present in the […]