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The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement.Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.453 592 37 kilograms, and which is divided into 16 avoirdupois ounces. [1]
The pound-force is equal to the gravitational force exerted on a mass of one avoirdupois pound on the surface of Earth. Since the 18th century, the unit has been used in low-precision measurements, for which small changes in Earth's gravity (which varies from equator to pole by up to half a percent) can safely be neglected. [4]
A slug is defined as a mass that is accelerated by 1 ft/s 2 when a net force of one pound (lbf) is exerted on it. [2] One slug is a mass equal to 32.17405 lb (14.59390 kg) based on standard gravity, the international foot, and the avoirdupois pound. [3] In other words, at the Earth's surface (in standard gravity), an object with a mass of 1 ...
Modern estimates of the libra range from 322 to 329 g (11.4 to 11.6 oz) with 5076 grains or 328.9 g (11.60 oz) an accepted figure. [ 3 ] [ 15 ] [ 17 ] The as was reduced from 12 ounces to 2 after the First Punic War , to 1 during the Second Punic War , and to half an ounce by the 131 BC Lex Papiria .
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A grain is a unit of measurement of mass, and in the troy weight, avoirdupois, and apothecaries' systems, equal to exactly 64.798 91 milligrams. It is nominally based upon the mass of a single ideal seed of a cereal. From the Bronze Age into the Renaissance, the average masses of wheat and barley grains were part of the legal definitions of ...
Libra and Aquarius: Marriage Compatibility That relationship advice I just gave goes double for a marriage. And another thing to keep in mind: Aquarius needs more alone time than super-social Libra.
In classical Latin the approximate equivalent of a mina was the libra (the word also meant "balance" or "weighing scales"). [24] With a weight of only 328.9 g (11.60 oz), however, the Roman libra was lighter than either a Greek mina or a modern pound of 16 ounces. It was divided into 12 Roman ounces.