In+a+vacuum
111Vacuum variable capacitor — A vacuum variable capacitor uses a high vacuum as the dielectric instead of air or other insulating material. This allows for a higher voltage rating and/or capacitance value using a smaller total volume. In addition to the higher voltage rating… …
112vacuum — [[t]væ̱kjuːm, juːəm[/t]] vacuums, vacuuming, vacuumed 1) N COUNT: usu sing, oft supp N If someone or something creates a vacuum, they leave a place or position which then needs to be filled by another person or thing. The collapse of the army… …
113Vacuum arc — A vacuum arc can arise when the surfaces of metal electrodes in contact with a good vacuum begin to emit electrons either through heating (thermionic emission) or via an electric field that is sufficient to cause field emission. Once initiated, a …
114Vacuum manifold — In quantum field theory, the vacuum state may be degenerate. Each pure vacuum state generates its own superselection sector. The space of all pure vacuum states often has a manifold structure and is called the vacuum manifold.Vacuum manifolds… …
115Vacuum polarization — In quantum field theory, and specifically quantum electrodynamics, vacuum polarization describes a process in which a background electromagnetic field produces virtual electron positron pairs that change the distribution of charges and currents… …
116Vacuum permittivity — This article is about the electric constant. For the analogous magnetic constant, see vacuum permeability. For the ordinal in mathematics ε0, see epsilon naught. The physical constant ε0, commonly called the vacuum permittivity, permittivity of… …
117vacuum — vac|u|um1 [ vækjuəm, vækjum ] noun * 1. ) count an enclosed space that has had all the air and any other gases removed from it 2. ) singular a feeling that something is missing, or a situation in which something is missing: political/power vacuum …
118vacuum advance — A mechanism on the side of the distributor that automatically varies the instant at which the spark occurs as a function of intake manifold vacuum. Vacuum advance provides the additional advance that is needed when the engine is operating at part …
119Vacuum coffee maker — A vacuum coffee maker brews coffee using two chambers where vapor pressure and vacuum produce coffee which is clean, crisp, rich and smooth compared to other brewing methods. This type of coffee maker is also known as vac pot , siphon or syphon… …
120vacuum — n. 1) to create, produce a vacuum 2) to break; fill a vacuum 3) a partial vacuum 4) in a vacuum (nothing can live in a vacuum) * * * [ vækjʊ(ə)m] fill a vacuum produce a vacuum a partial vacuum to break to create in a vacuum (nothing can live in… …
