## Density

The **mass density** or **density** of a material is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho). Mathematically, density is defined as mass divided by volume:

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### Some articles on density:

**Density**- Other Common Units

... The SI unit for

**density**is kilograms per cubic metre (kg/m3) Litres and metric tons are not part of the SI, but are acceptable for use with it, leading to the following units kilograms per litre ... Liquid water has a

**density**of about 1 kg/dm3, making any of these SI units numerically convenient to use as most solids and liquids have densities between 0.1 and 20 kg/dm3 ... per cubic metre (Mg/m3) In US customary units

**density**can be stated in Avoirdupois ounces per cubic inch (oz/cu in) Avoirdupois pounds per cubic inch (lb/cu in) pounds per cubic foot (lb/cu ...

Boussinesq Approximation (buoyancy)

... It states that

... It states that

**density**differences are sufficiently small to be neglected, except where they appear in terms multiplied by g, the acceleration due to gravity ... are impossible/neglected when the Boussinesq approximation is used since sound waves move via**density**variations ... advantage arises because when considering a flow of, say, warm and cold water of**density**and one needs only consider a single**density**the difference is negligible ...Classification By Schwarzschild Radius - Stellar Black Hole

... If one accumulates matter at nuclear

... If one accumulates matter at nuclear

**density**(the**density**of the nucleus of an atom, about 1018 kg/m3 neutron stars also reach this**density**), such an accumulation would fall within ...Spectral

... More specific terms which are used are the power spectrum, spectral

**Density**... More specific terms which are used are the power spectrum, spectral

**density**, power spectral**density**, or energy spectral**density**...**Density**Estimation

... In probability and statistics,

**density**estimation is the construction of an estimate, based on observed data, of an unobservable underlying ... The unobservable

**density**function is thought of as the

**density**according to which a large population is distributed the data are usually thought of as a random sample from that population ... A variety of approaches to

**density**estimation are used, including Parzen windows and a range of data clustering techniques, including vector quantization ...

### More definitions of "density":

- (
*noun*): The spatial property of being crowded together.

Synonyms: concentration, denseness, compactness

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