density, ratio of the mass mass, in physics, the quantity of matter in a body regardless of its volume or of any forces acting on it. The term should not be confused with weight, which is the measure of the force of gravity (see gravitation) acting on a body.
..... Click the link for more information. of a substance to its volume, expressed, for example, in units of grams per cubic centimeter or pounds per cubic foot. The density of a pure substance varies little from sample to sample and is often considered a characteristic property of the substance. Most substances undergo expansion when heated and therefore have lower densities at higher temperatures. Many substances, especially gases, can be compressed into a smaller volume by increasing the pressure acting on them. For these reasons, the temperature and pressure at which the density of a substance is measured are usually specified. The density of a gas is often converted mathematically to what it would be at a standard temperature and pressure (see STP). Water is unusual in that it expands, and thus decreases in density, as it is cooled below 3.98°C; (its temperature of maximum density). Density often is taken as an indication of how "heavy" a substance is. Iron is denser than cork, since a given volume of iron is more massive (and weighs more) than the same volume of cork. It is often said that iron is "heavier" than cork, although a large volume of cork obviously can be more massive and thus be heavier (i.e., weigh more) than a small volume of iron. See specific gravity specific gravity, ratio of the weight of a given volume of a substance to the weight of an equal volume of some reference substance, or, equivalently, the ratio of the masses of equal volumes of the two substances.
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density

Mass of a unit volume of a material substance. It is calculated by dividing an object's mass by its volume. In the International System of Units, and depending on the units of measurement used, density can be expressed in grams per cubic centimetre (g/cm³) or kilograms per cubic metre (kg/m³). The expression “particle density” refers to the number of particles per unit volume, not to the density of a single particle. See also specific gravity.

density

See packing density and bit density.

density

1. a measure of the compactness of a substance, expressed as its mass per unit volume. It is measured in kilograms per cubic metre or pounds per cubic foot.

2. a measure of a physical quantity per unit of length, area, or volume

3. Physics Photog See transmission density reflection density

density [′den· səd·ē]

(materials)

Closeness of texture or consistency.

(mathematics)

For an increasing sequence of integers, the greatest lower bound of the quantityF(n)/n,whereF(n) is the number of integers in the sequence (other than zero) equal to or less thann.

(mechanics)

The mass of a given substance per unit volume.

(optics)

The degree of opacity of a translucent material.

The common logarithm of opacity.

(physics)

The total amount of a quantity, such as energy, per unit of space.

Density

The mass per unit volume of a material. The term is applicable to mixtures and pure substances and to matter in the solid, liquid, gaseous, or plasma state. Density of all matter depends on temperature; the density of a mixture may depend on its composition, and the density of a gas on its pressure. Common units of density are grams per cubic centimeter, and slugs or pounds per cubic foot. The specific gravity of a material is defined as the ratio of its density to the density of some standard material, such as water at a specified temperature, for example, 60°F (15.6°C), or, for gases the basis may be air at standard temperature and pressure. Another related concept is weight density, which is defined as the weight of a unit volume of the material. See Mass, Weight

density

The degree of aggregation; the quantity of any entity distributed over an area per unit of areal measure, e.g., persons per acre, families per acre, or dwelling units per square mile.

Density

in textiles, the content of fibrous material per unit volume. The density of a weave determines the strength and appearance of the fabric. It is usually expressed by the number of warp threads per unit of width and the number of filling threads per unit of length—that is, the ratio of absolute density along warp and filling. When the linear density (fineness) of the threads varies, a ratio of relative density is used, expressed by a filling coefficient—linear, surface, or volume—representing the relationship of the linear measurements of surface or volume to the overall width, length, surface, or volume of a unit of material. The relative density is determined basically by the type of fiber interlacing used in the weave. For a weave of normal density, about 40 or 50 percent of the volume of a fabric consists of fibrous material.

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No references found			The density of the weed gave me a reassuring sense of hiding. The War Of The Worlds by Wells, H.G. View in context Their density would not en- able them to understand his sharper point of view. The Red Badge of Courage by Crane, Stephen View in context "I did not mean," he said over the soup, addressing Alexey Alexandrovitch, "mere density of population alone, but in conjunction with fundamental ideas, and not by means of principles. Anna Karenina by Tolstoy, Leo View in context			Denonville, Jacques René de Brisay, marquis de denotational semantics Denotational Semantics Language denouement dense Dense and Nondense Sets dense binary code dense concrete dense connective tissue dense fibrillar component dense list dense subset dense-air refrigeration cycle dense-air system dense-graded aggregate dense-in-itself set dense-media separator densification densified impregnated wood densified wood densify Densimeter Densimetry Densitometer Densitometry Density Density ? density airspeed density altitude density bombing density bottle density channel density control density correction density current Density Currents density effect density error density function density gage density gradient centrifugation density indicator density log Density Matrix density modulation Density of Fire density of states density packing Density Point density ratio density rule			Densiti Densiti Densiti Densiti Densiti Densiti densities densities densities densities densities densities densitometer densitometer densitometer densitometers densitometers densitometers densitometric densitometric densitometric densitometrically densitometrically densitometrically densitometry densitometry densitometry Densitometry, x-ray Densitometry, x-ray Densitometry, x-ray Density Density (disambiguation) Density (disambiguation) Density (disambiguation) Density ? Density 21.5 density airspeed Density altitude Density altitude Density Altitude/Pressure Altitude Density Analysis System density bombing density bottle density channel density control density correction Density Current Density Current Baffle Density Currents Density curve Density curve Density curve Density Dependence of the Maximal Expiratory Flow density dependent Density Dependent Delta Interaction density effect Density Enhanced Phosphatase-1 Density Equalizing Map Projection density error Density Evolution

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density

Density