equivalent density

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• Equivalent airspeed — (EAS) is the airspeed at sea level which represents the same dynamic pressure as that flying at the true airspeed (TAS) at altitude. It is useful for predicting aircraft handling, aerodynamic loads, stalling etc.EAS = TAS imes sqrt{frac{actual… …   Wikipedia

• Density altitude — Computation Chart. Density altitude is the altitude in the International Standard Atmosphere at which the air density would be equal to the actual air density at the place of observation, or, in other words, the height when measured in terms of… …   Wikipedia

• Equivalent potential temperature — Equivalent potential temperature, commonly referred to as Theta e left( heta e ight), is a quantity related to the stability of a column of air in the atmosphere. heta e is the temperature a parcel of air would reach if all the water vapor in the …   Wikipedia

• Density matrix — Mixed state redirects here. For the psychiatric condition, see Mixed state (psychiatry). In quantum mechanics, a density matrix is a self adjoint (or Hermitian) positive semidefinite matrix (possibly infinite dimensional) of trace one, that… …   Wikipedia

• Density functional theory — Electronic structure methods Tight binding Nearly free electron model Hartree–Fock method Modern valence bond Generalized valence bond Møller–Plesset perturbation theory …   Wikipedia

• Equivalent noise resistance — In telecommunication, an equivalent noise resistance is a quantitative representation in resistance units of the spectral density of a noise voltage generator, given byR n = frac {pi W n}{k T 0} where W n is the spectral density, k is the… …   Wikipedia

• Density on a manifold — In mathematics, and specifically differential geometry, a density is a spatially varying quantity on a differentiable manifold which can be integrated in an intrinsic manner. Abstractly, a density is a section of a certain trivial line bundle,… …   Wikipedia

• Equivalent isotropically radiated power — In radio communication systems, Equivalent isotropically radiated power (EIRP) or, alternatively, Effective isotropically radiated power [ IEEE Std. 100 The Authoritative Dictionary of IEEE Standards Terms, 7th Edition , The Institute of… …   Wikipedia

• density error — The correction applied to equivalent air speed (EAS) to get true air speed (TAS) …   Aviation dictionary

• Miles per gallon gasoline equivalent — Monroney label showing the EPA s fuel economy equivalent ratings for the 2011 Chevrolet Volt. The rating for all electric mode (left) is expressed in miles per gallon gasoline equivalent. Miles per gallon gasoline equivalent (MPGe or MPGge) is a… …   Wikipedia

• Energy density — For energy density in the sense of energy per unit mass, see specific energy. For energy density of foods, see specific energy. Energy density is a term used for the amount of energy stored in a given system or region of space per unit volume.… …   Wikipedia