Onza
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Definición
Una unidad imperial de doble uso: como unidad de masa (avoirdupois), 1 oz = 28,3495 g (1/16 lb); como unidad de volumen, 1 onza líquida estadounidense = 29,5735 mL.
Explicación
The mass ounce and fluid ounce are separate units that should not be confused. One US fluid ounce is defined to make a pint of water weigh approximately one pound — a practical approximation since water's density is close to 1 g/mL. Gold and silver use the troy ounce (31.1035 g), which is heavier than the avoirdupois ounce. Nutrition labels in the US commonly express serving sizes in ounces.
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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.