Vacuum energy — is an underlying background energy that exists in space even when devoid of matter (known as free space). The vacuum energy is deduced from the concept of virtual particles, which is itself derived from the energy time uncertainty principle. Its… … Wikipedia
Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… … Wikipedia
Vacuum brake — The vacuum brake is a braking system used on trains. It was first introduced in the mid 1860s and a variant, the automatic vacuum brake system became almost universal in British train equipment, and in those countries influenced by British… … Wikipedia
Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… … Wikipedia
Vacuum cleaner — Cylinder vacuum cleaner for home use. French train vacuum cleaner … Wikipedia
Vacuum Diagrams — Infobox Book name = Vacuum Diagrams title orig = translator = author = Stephen Baxter cover artist = country = Great Britain language = English series = Xeelee Sequence genre = Science fiction publisher = Voyager (UK) release date = 24 April 1997 … Wikipedia
Vacuum insulated panel — A Vacuum Insulated Panel (VIP) uses the insulating effects of a vacuum to produce much higher R values than conventional insulation. Conventional insulation produces an R value of eight or less per inch (fiberglass being towards the lower end and … Wikipedia
Vacuum flange — Conflat redirects here. For other uses, see Conflat (disambiguation). A KF 25 tee, o ring, and clamp. A vacuum flange is a flange at the end of a tube used to connect vacuum chambers, tubing and vacuum pumps to each other. Contents … Wikipedia
vacuum technology — Introduction all processes and physical measurements carried out under conditions of below normal atmospheric pressure. A process or physical measurement is generally performed in a vacuum for one of the following reasons: (1) to remove the … Universalium
Vacuum-anchor — In large scale oceanic civil engineering, vacuum anchors are ocean bottom fasteners used to anchor deep seas oil platforms (example: See Troll A Oil Platform) and other gravity base technology based structuresCite Sm a National Geographic Channel … Wikipedia
vacuum — I UK [ˈvækjʊəm] / US [ˈvækjuəm] / US [ˈvækjum] noun Word forms vacuum : singular vacuum plural vacuums * 1) [countable] physics a space that has had all the air and any other gases removed from it 2) [singular] a feeling that something is missing … English dictionary