Julio
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Definición
La unidad de energía del SI, igual al trabajo realizado por una fuerza de un newton actuando a lo largo de un metro (1 J = 1 N·m = 1 kg·m²/s²).
Explicación
Named after physicist James Prescott Joule. Lifting a 100 g apple by 1 meter requires approximately 1 joule of energy. A food calorie (kcal) equals 4,184 joules; a AA battery stores about 9,000 J; an average human daily caloric intake of 2,000 kcal equals roughly 8.4 million joules.
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RELATED TERMS
Metro
La unidad de longitud del SI, definida como la distancia que recorre la luz en 1/299.792.458 de segundo.
Kilogramo
La unidad de masa del SI, definida mediante la constante de Planck.
Segundo
La unidad de tiempo del SI, definida mediante el átomo de cesio-133.
Kelvin
La unidad de temperatura termodinámica del SI, cuyo punto de partida es el cero absoluto.
Amperio
La unidad de corriente eléctrica del SI.