equation states that
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equation of continuity — The equation of continuity states that (a) air mass flow is constant, as mass can neither be created nor destroyed, and (b) the product of a cross sectional area (A), velocity (V), and density (ρ) is constant (K), or AVρ = K. It assumes that… … Aviation dictionary
Continuity equation — A continuity equation in physics is a differential equation that describes the transport of a conserved quantity. Since mass, energy, momentum, electric charge and other natural quantities are conserved under their respective appropriate… … Wikipedia
Drake equation — This article is about Frank Drake s equation. For the Tub Ring music album, see Drake Equation (album). The Drake equation (sometimes called the Green Bank equation or the Green Bank Formula) is an equation used to estimate the number of… … Wikipedia
Groundwater flow equation — Used in hydrogeology, the groundwater flow equation is the mathematical relationship which is used to describe the flow of groundwater through an aquifer. The transient flow of groundwater is described by a form of the diffusion equation, similar … Wikipedia
Exner equation — IntroductionThe Exner equation is a statement of conservation of mass that applies to sediment in a fluvial system such as a river. [Paola, C., and V. R. Voller (2005), A generalized Exner equation for sediment mass balance, J. Geophys. Res. ,… … Wikipedia
Mild-slope equation — Simulation of wave penetration involving diffraction and refraction into Tedious Creek, Maryland, using CGWAVE (which solves the mild slope equation). In fluid dynamics, the mild slope equation describes the combined effects of diffraction and… … Wikipedia
Vorticity equation — The vorticity equation is an important prognostic equation in the atmospheric sciences. Vorticity is a vector, therefore, there are three components. The equation of vorticity (three components in the canonical form) describes the total… … Wikipedia
Laplace's equation — In mathematics, a partial differential equation whose solutions (harmonic functions) are useful in investigating physical problems in three dimensions involving gravitational, electrical, and magnetic fields, and certain types of fluid motion.… … Universalium
Gibbs–Helmholtz equation — The Gibbs–Helmholtz equation is a thermodynamic equation useful for calculating changes in the Gibbs energy of a system as a function of temperature. It is named after Josiah Willard Gibbs and Hermann von Helmholtz::left( frac{partial ( frac{G}… … Wikipedia
Equation of state — In physics and thermodynamics, an equation of state is a relation between state variables.cite book | author=Perrot, Pierre | title=A to Z of Thermodynamics | publisher=Oxford University Press | year=1998 | id=ISBN 0 19 856552 6] More… … Wikipedia
Equation of time — Time Time, n.; pl. {Times}. [OE. time, AS. t[=i]ma, akin to t[=i]d time, and to Icel. t[=i]mi, Dan. time an hour, Sw. timme. [root]58. See {Tide}, n.] 1. Duration, considered independently of any system of measurement or any employment of terms… … The Collaborative International Dictionary of English
