File:Density_column.JPG · Wikimedia Commons · See Wikimedia Commons
密度
Also known as volumetric mass density, volumic mass, density
单位
AI overview
Mass density measures how much mass is packed into a given volume of a substance, calculated by dividing the mass by the volume. It's useful for understanding and comparing materials—for example, why lead feels heavier than wood of the same size, or for practical applications like determining whether something will float or sink in water.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Physical quantity.name
- Density
- Physical quantity.image
- Density column.JPG
- Physical quantity.image_size
- 100px
- Physical quantity.caption
- A test tube holding four non-miscible colored liquids with different densities
- Physical quantity.unit
- kg/m3
- Physical quantity.symbols
- ρ, D, d
- Physical quantity.dimension
- wikidata
- Physical quantity.extensive
- No
- Physical quantity.intensive
- Yes
- Physical quantity.conserved
- No
- Physical quantity.derivations
- \rho = \frac{m}{V}
- Physical quantity.otherunits
- g/cm3
Article · 中文
密度是指一物質單位體積下的質量，常用希臘字母ρ或是英文字母D（Density）表示。在數學上，密度定義為質量除以體積的商 。及物體的質量與體積的比值： 其中ρ為密度，m為質量，V為體積。 有時（例如美國的石油業或天然氣產業）會將密度定義為單位體積的重量，不過在科學上是不精確的，此物理量應稱為比重量。
Abstract from DBpedia / Wikipedia · CC BY-SA