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Density 21.5 (7117 bytes)
1: ...e]] for the premiere of his platinum flute, the [[density]] of platinum being 21.5 grammes per cubic centim... 3: ...e's Sean Hickey says, "According to the composer, Density 21.5 is based on two [[melody|melodic]] ideas -- ... 7: ...res [[resolution]]...has no relavance at all to ''Density 21.5''." (p. 17) However, there is still is some ... 11: ...sub>1</sub>. And here, in the last two notes of ''Density 21.5'' we at last find b paired with its tritone ... 13: ... "This variable relation of the basic motive of ''Density 21.5'' to the harmonic structure of the piece, an... Density (7342 bytes) 1: :''For other meanings of density, see [[density (disambiguation)]]'' 3: ...ty, the higher its mass per volume. The ''average density'' of an object equals its total mass [[division|d... 5: The '''[[SI]] unit''' of density is the [[kilogram per cubic metre]] ('''[[kilogra... 11: ''ρ'' is the object's density (measured in kilograms per cubic metre) 17: ==Various types of density== Schnirelmann density (7717 bytes) 2: In [[mathematics]], the '''Schnirelmann density''' of a [[sequence]] of numbers is a way to measu... 4: ...r intuitive notion. This is what the Schnirelmann density does. 7: The Schnirelmann density of a set of natural numbers is defined as follows 10: ...eding <math>n</math>. The '''Schnirelmann natural density''' of <math>A</math> is defined as: 18: ...y</math>, which might not exist. The Schnirelmann density, on the other hand, is always defined. Electron density (2106 bytes) 1: '''Electron density''' is the measure of the [[probability]] of an [[... 3: ...[[haemoglobin]] and [[chlorophyll]]) the electron density covers an entire region, i.e., in benzene they ar... 7: ...nt the delocalisation of areas where the electron density is higher next to the single bonds (e.g., the whi... Double density (547 bytes) 1: '''Double Density''' usually refers to a physical format in a [[mag... 3: In 3.5" [[Floppy disk]]s double density marks a disk format that uses 9 sectors of 512 [[... 5: ...ch doubles the capacity and bit density of double density. 7: The term double density can also be applied to magnetic tapes. 9: [[de:Double Density]] Density (disambiguation) (442 bytes) 3: * [[Density]], treating mass-density in the physical sciences. 4: * '''Charge density''' is the [[electric charge]] per unit area or pe... 5: * [[Population density]] 6: * [[Probability density function]] 7: * [[Schnirelmann density]] in [[number theory]] Spectral density (1436 bytes) 1: ...nsity''', or more correctly the '''power spectral density''' (PSD) of a given [[bandwidth]] of [[electromag... 3: '''Spectral density''' is usually expressed in [[watt]]s per [[hertz]... 5: ...d energy spectral densities. The energy spectral density is defined as 15: ...may not exist. Thus we define the power spectral density as the --> 27: .../UsersGuidetoTimeSeries/1.8.1.html Power Spectral Density Function] - from [[Wolfram Research]]'s "Time Ser... Population density (5513 bytes) 1: ...''(If you were linked from a country article: the density there is based on land area, see below)'' 3: ...requently applied to living organisms. Population density is usually expressed in terms of items or organis... 5: == Definitions of population density == 7: ...d are modelled as discrete points, the population density will jump up and down as the edge of the sampling... 9: To resolve some of these problems, population density may be regarded, like coastline distance, as a sc... Density of air (3858 bytes) 1: .../sup>. varying with pressure and temperature. Air density and [[air pressure]] decrease with increasing alt... 5: The formula for the density of air is given by: 9: where ''ρ'' is the air density, ''p'' is pressure, ''R'' is the gas constant, an... 16: ...ssure]] (0 °C and 101.325 kPa), dry air has a density of ρ<sub>STP</sub> = 1.293 kg/m<sup>3</sup>). 17: ...nd pressure (25 °C and 100 kPa) dry air has a density of ρ<sub>SATP</sub> = 1.168 kg/m<sup>3</sup>)... Planck density (612 bytes) 1: ...ity''' is the [[Natural units|natural unit]] of [[density]], denoted by <b>ρ</b><sub>P</sub>. 21: [[Category:Units of density]] 22: [[Category:Natural units|Density]] Area density (231 bytes) 1: The '''area density''' of a two-dimensional object is calculated as t... Torque density (1626 bytes) 1: ... expressed in units of torque per volume. Torque density is a system [[property]] since it depends on the ... 3: Torque density is useful during the [[concept]] evaluation stage... 6: In [[SI|SI units]], torque density is expressed in [[joule]]s per [[cubic metre]] or... 9: In [[U.S. customary units]], torque density is expressed in [[foot-pound|foot-pounds force]] ... Linear density (236 bytes) 1: The '''linear density''' of a one-dimensional object is calculated as t... Density estimation (1003 bytes) 2: ...nobservable density function is thought of as the density according to which a large population is distribu... 4: A variety of approaches to density estimation are used, including [[Parzen window]]s... 6: Here is an [[illustration of density estimation]]. 12: * D.W. Scott. ''Multivariate Density Estimation. Theory, Practice and Visualization''.... 14: * B.W. Silverman. ''Density Estimation''. London: Chapman and Hall, 1986. Density of states (512 bytes) 1: '''Density of states (DOS)''' is a property in [[condensed m... Density state (3183 bytes) 1: A '''density [[matrix (math)|matrix]]''', or '''density operator''', is used in [[quantum theory]] to des... 2: quantum-mechanical analogue to a [[phase-space density]] (probability distribution of position and momen... 3: ...or a statistical description via [[density matrix|density matrices]] arises because it is not possible to d... 5: Typical situations in which a density matrix is needed include: a quantum system in the... 6: ...ere each individual system must be described by a density matrix even though the complete system may be in ... Mixture density (1647 bytes) 1: ...vex]] [[linear combination]] of other probability density functions. 3: ...me set ''A'', ''p''(''x'',''a'') is a probability density function with respect to ''x''. Given a nonnegati... 7: ... density function for ''x'', called the ''mixture density'' defined by the ''mixture components'' ''p''(''x... 9: ...es of the parameter ''a'' are finite, the mixture density is called a ''finite mixture'', and the integrati... 14: ...xtures, and an unqualified reference to a mixture density usually means a finite mixture. Nuclear density (141 bytes) 1: ...], about 1018 kg/m³; [[neutron stars]] reach this density. Density altitude (457 bytes) 1: ...ir|air density]] would be equal to the actual air density at the place of observation. 3: ...air density. Thus in hot and humid conditions the density altitude at a particular location may be signific... Force density (577 bytes) 1: ...ic force]] within the bulk of a [[fluid]]. Force density is represented by the symbol '''f''', and given b... 9: Thus, the force density at a point in a fluid determines the [[accelerati...
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