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A United States Navy Aviation boatswain's mate tests the specific gravity of JP-5 fuel. Relative density, also called specific gravity, [1] [2] is a dimensionless quantity defined as the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material.
The specific weight, also known as the unit weight (symbol γ, the Greek letter gamma), is a volume-specific quantity defined as the weight W divided by the volume V of a material: = / Equivalently, it may also be formulated as the product of density, ρ, and gravity acceleration, g: = Its unit of measurement in the International System of Units (SI) is newton per cubic metre (N/m 3), with ...
The term “equivalent weight” had a distinct meaning in gravimetric analysis: it meant the mass of precipitate produced from one gram of analyte (the species of interest). The different definitions came from the practice of quoting gravimetric results as mass fractions of the analyte, often expressed as a percentage. A related term was the ...
In the paper and fabric industries, it is called grammage and is expressed in grams per square meter (g/m 2); for paper in particular, it may be expressed as pounds per ream of standard sizes ("basis ream"). A related area number density can be defined by replacing mass by number of particles or other countable quantity, with resulting units of ...
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
≡ 1 ⁄ 12 lb t = 31.103 4768 g: ounce (avoirdupois) oz av ≡ 1 ⁄ 16 lb = 28.349 523 125 g: ounce (US food nutrition labelling) oz ≡ 28 g [18] = 28 g pennyweight: dwt; pwt ≡ 1 ⁄ 20 oz t = 1.555 173 84 g: point: ≡ 1 ⁄ 100 ct = 2 mg pound (avoirdupois) lb av ≡ 0.453 592 37 kg = 7000 grains ≡ 0.453 592 37 kg: pound (metric) ≡ ...
The new value is the mean atmospheric pressure at an altitude of about 112 metres, which is closer to the worldwide median altitude of human habitation (194 m). [ 10 ] Natural gas companies in Europe, Australia, and South America have adopted 15 °C (59 °F) and 101.325 kPa (14.696 psi) as their standard gas volume reference conditions, used as ...
Potential energy with respect to gravity, close to Earth, per unit mass: gh, where g is the acceleration due to gravity (standardized as ≈9.8 m/s 2) and h is the height above the reference level (giving J/kg when g is in m/s 2 and h is in m).