relative field
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Relative permittivity — Relative static permittivities of some materials at room temperature under 1 kHz[1] Material εr Vacuum 1 (by definition) Air 1.00058986 ± 0.00000050 (at STP, for 0.9 MH … Wikipedia
Relative density — Relative density, sometimes called specific density, is the ratio of the density of a substance to the density of a given reference material. If a substance s relative density is less than one then it is less dense than the reference; if greater… … Wikipedia
Field emission — (FE) is the emission of electrons from the surface of a condensed phase into another phase due to the presence of high electric fields. In this phenomenon, electrons with energies below the Fermi level tunnel through the potential barrier at the… … Wikipedia
Field Target — is an outdoor air gun discipline originating in the United Kingdom, on the late 1980s, but gaining popularity worldwide.UK RulesIn UK (United Kingdom) rules, competitors aim to shoot the small “kill” zone that forms part of a larger metal… … Wikipedia
Relative valuation — is a generic term that refers to the notion of comparing the price of an asset to the market value of similar assets. In the field of securities investment, the idea has led to important practical tools, which could presumably spot pricing… … Wikipedia
Field hospitals (France) — Field hospitals in France are managed by the SAMU (French emergency medical service.In France, there are two types mobile medical kits ( poste sanitaire mobile or PSM) used: * the level one mobile medical kit (PSM1): it can handle 25 heavy… … Wikipedia
Relative effectiveness factor — or R.E. factor is a measurement of an explosive s power for military demolitions purposes. It is used to compare an explosives effectiveness relative to TNT by weight only. This is so engineers can substitute one explosive for another when they… … Wikipedia
Relative static permittivity — The relative static permittivity (or static relative permittivity) of a material under given conditions is a measure of the extent to which it concentrates electrostatic lines of flux. It is the ratio of the amount of stored electrical energy… … Wikipedia
Field electron emission — It is requested that a diagram or diagrams be included in this article to improve its quality. For more information, refer to discussion on this page and/or the listing at Wikipedia:Requested images. Field emission (FE) (also known as field… … Wikipedia
Field (physics) — The magnitude of an electric field surrounding two equally charged (repelling) particles. Brighter areas have a greater magnitude. The direction of the field is not visible … Wikipedia
Field artillery in the American Civil War — M1857 Napoleon at Stones River battlefield cemetery. Field artillery in the American Civil War refers to the important artillery weapons, equipment, and practices used by the Artillery branch to support the infantry and cavalry forces in the… … Wikipedia
