Libra
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Definición
Una unidad imperial de masa igual a exactamente 453,59237 gramos (16 onzas avoirdupois), también usada como unidad de fuerza (libra-fuerza) igual a 4,44822 newtons.
Explicación
The pound (lb) abbreviation comes from the Latin 'libra pondo' (a pound by weight). As a force unit, one pound-force is the weight of one pound mass under standard gravity (9.80665 m/s²). The US uses pounds for body weight where most countries use kilograms; 1 kg = 2.20462 lb. The pound sterling currency takes its name from a pound of silver.
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RELATED TERMS
Sistema Imperial
Un sistema de medición utilizado principalmente en los Estados Unidos, basado en unidades inglesas históricas.
Peso Troy
Un sistema de pesas utilizado para metales preciosos y gemas.
Avoirdupois
El sistema estándar de pesas basado en la libra de 16 onzas, utilizado para bienes de uso cotidiano.
Caballo de Vapor
Una unidad de potencia. El caballo de vapor mecánico equivale aproximadamente a 745,7 vatios.
BTU (Unidad Térmica Británica)
La cantidad de calor necesaria para elevar la temperatura de una libra de agua en un grado Fahrenheit.