net cross-sectional area
81Electromigration — is the transport of material caused by the gradual movement of the ions in a conductor due to the momentum transfer between conducting electrons and diffusing metal atoms. The effect is important in applications where high direct current… …
82Voltage drop — is the reduction in voltage in an electrical circuit between the source and load. In electrical wiring national and local electrical codes may set guidelines for maximum voltage drop allowed in a circuit, to ensure reasonable efficiency of… …
83Variable Cycle Engine — In a Variable Cycle Engine (VCE) the engine cycle is deliberately modified from that which would occur under normal circumstances.The next generation of Supersonic transport (SST) may require some form of VCE. SST engines require a high Specific… …
84Drift velocity — The drift velocity is the average velocity that a particle, such as an electron, attains due to an electric field. It can also be referred to as Axial Drift Velocity since particles defined are assumed to be moving along a plane. In general, an… …
85Light field — The light field is a function that describes the amount of light traveling in every direction through every point in space. Michael Faraday was the first to propose (in an 1846 lecture entitled Thoughts on Ray Vibrations ) that light should be… …
86David Schwarz (aviation inventor) — David Schwarz David Schwarz (Croatian: David Švarc; December 20, 1852,Note a Keszthely, Kingdom of HungaryNote b – January 13, 1897, Vienna[1 …
87Plug flow reactor model — The plug flow reactor (PFR) model is used to describe chemical reactions in continuous, flowing systems. The PFR model is used to predict the behaviour of chemical reactors, so that key reactor variables, such as the dimensions of the reactor,… …
88Ion pump (physics) — An ion pump works by creating an electric field across a fluid containing ions. An ion is an electrically charged atom or molecule. If the fluid does not naturally contain ions, then it must be ionized before an ion pump will work. A fluid is… …
89Heat — In physics, heat, symbolized by Q , is energy transferred from one body or system to another due to a difference in temperature. [cite book|author= Daintith, John |title=Oxford Dictionary of Physics|publisher=Oxford University… …
90river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …
