theory of symmetrical components
121X-ray fluorescence — (XRF) is the emission of characteristic secondary (or fluorescent) X rays from a material that has been excited by bombarding with high energy X rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis,… …
122Molecular model — A molecular model, in this article, is a physical model that represents molecules and their processes. The creation of mathematical models of molecular properties and behaviour is molecular modelling, and their graphical depiction is molecular… …
123Valve audio amplifier - technical — Circuitry and performance Characteristics of valves Valves are very high input impedance (near infinite in most circuits) and high output impedance devices. They are also high voltage / low current devices.While valves themselves are described… …
124Foreign internal defense — (FID) is used by a number of Western militaries, explicitly by the United States but sharing ideas with countries including France and the United Kingdom, to describe an approach to combating actual or threatened insurgency in a foreign state… …
125carboxylic acid — Chem. any organic acid containing one or more carboxyl groups. [1900 05; CARBOXYL + IC] * * * Any organic compound with the general chemical formula ―COOH in which a carbon (C) atom is bonded to an oxygen (O) atom by a double bond to make a… …
126Effects of stress on memory — The effects of stress on memory include interference with one’s capacity to encode and ability retrieve information.[1] When stress occurs, the body reacts by secreting stress hormones into the blood stream. Over secretion of stress hormones most …
127CULTURAL LIFE — Introduction The movement for the return to Zion which emerged as a force at the end of the 19th century was based on a variety of motivations, including the political – the demand for an independent homeland where the Jews could forge their own… …
128Geomagnetic reversal — Magnetic reversal redirects here. For switching of a magnet, see Magnetization reversal. Geomagnetic polarity during the late Cenozoic Era. Dark areas denote periods where the polarity matches today s polarity, light areas denote periods where… …
