**Equation of exchange** — In economics, the equation of exchange is the relation::Mcdot V = Pcdot Qwhere, for a given period,:M, is the total amount of money in circulation on average in an economy.:V, is the velocity of money, that is the average frequency with which a… … Wikipedia

**equation of exchange** — a formulation in economics: the quantity of money in circulation times its average rate of turnover is equal to the average price level times the quantity of goods exchanged … Useful english dictionary

**Exchange bias** — or exchange anisotropy occurs in bilayers (or multilayers) of magnetic materials where the hard magnetization behavior of an antiferromagnetic thin film causes a shift in the soft magnetization curve of a ferromagnetic film. The exchange bias… … Wikipedia

**equation** — e‧qua‧tion [ɪˈkweɪʒn] noun [countable] a statement in mathematics, showing that two quantities are equal acˈcounting eˌquation one of the relationships between assets and liabilities used in accounting: • The accounting equation here is: assets… … Financial and business terms

**Exchange paradox** — The exchange paradox is a paradox within the probability theory and the decision theory which demonstrates problems that can arise when working with expected values. It can appear in different forms and hence under different names. Often it is… … Wikipedia

**Équation de Black** — L Équation de Black est un modèle mathémathique estimant le temps moyen jusqu à la défaillance (MTTF : mean time to failure en anglais) d un circuit microélectronique provoquée par le phénomène d électromigration. L équation tient son nom de … Wikipédia en Français

**equation** — A statement expressing the equality of two things, usually with the use of mathematical or chemical symbols. [L. aequare, to make equal] alveolar gas e. the e. defining the steady state relation of the alveolar oxygen pressure to the barometric… … Medical dictionary

**Tafel equation** — The Tafel equation relates the rate of an electrochemical reaction to the overpotential. [Bard, A. J.; Faulkner, L. R. “Electrochemical Methods. Fundamentals and Applications” 2nd Ed. Wiley, New York. 2001. ISBN 0 471 04372 9] The Tafel equation… … Wikipedia

**ion-exchange reaction** — ▪ chemical reaction Introduction any of a class of chemical reactions between two substances (each consisting of positively and negatively charged species called ions (ion)) that involves an exchange of one or more ionic components.… … Universalium

**Penman equation** — The Penman equation describes evaporation ( E ) from an open water surface, and was developed by Howard Penman in 1948. Penman s equation requires daily mean temperature, wind speed, relative humidity, and solar radiation to predict E. Simpler… … Wikipedia