焦耳
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://unitfyi.com/iframe/glossary/joule-def/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://unitfyi.com/glossary/joule-def/Add a dynamic SVG badge to your README or docs.
[](https://unitfyi.com/glossary/joule-def/)Use the native HTML custom element.
定义
SI能量单位，等于一牛顿力作用于一米距离所做的功（1 J = 1 N·m = 1 kg·m²/s²）。
解释
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.
RELATED CONVERSIONS
RELATED ARTICLES
From milligrams to metric tons, this guide covers every major weight and mass unit with exact conversion factors, real-world examples, and a clear explanation of why weight and mass are not the same thing.
Temperature Scales Explained: Celsius, Fahrenheit, and KelvinA complete guide to the four temperature scales in scientific and everyday use—Celsius, Fahrenheit, Kelvin, and Rankine—including their history, conversion formulas, and where they intersect.
Power Units Guide: Watts, Horsepower, and BTU/HourPower is the rate of energy transfer — how fast work is done. This guide covers watts, kilowatts, megawatts, horsepower, and BTU/hour with real-world context from light bulbs to power plants.