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| Results 51 - 60 of about 2523 for the
Vacuum
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The Swedish Vacuum Solar Telescope was a 47.5cm solar telescope on La Palma in the Canary Islands . It was removed on 28 August 2000 , and has been superseded by the Swedish Solar Telescope . This article about a specific observatory , telescope or astronomical instrument is a stub . You can help Wikipedia by expanding it .
http://www.allaboutall.info/article/Swedish Vacuum Solar Telescope
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The vacuum brake is a braking system used on trains . It was invented in 1877 in the USA , where it enjoyed only a brief period of popularity, primarily on narrow gauge railroads . The system took a greater hold in the United Kingdom , being used there as the primary form of train braking until the 1970s. Vacuum braking is for all practical purposes now a dead technology; it is not in...
http://www.allaboutall.info/article/Vacuum brake
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In electronics , a vacuum tube (American English) or (thermionic) valve (British English) is a device generally used to amplify , or otherwise modify, a signal by controlling the movement of electrons in an evacuated space. Once used in most electronic devices, vacuum tubes are now used only in specialized applications. For most purposes, the vacuum tube has been replaced by the much...
http://www.allaboutall.info/article/Vacuum tube
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Manual vacuum aspiration is a form of abortion using a manual vacuum . This medical article is a stub . You can help Wikipedia by expanding it .
http://www.allaboutall.info/article/Manual vacuum aspiration
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For other uses, see vacuum cleaner and Vacuum (musical group) . The root of the word vacuum is the Latin word vacuum (pl. vacua ) which means a space devoid of matter. In physics , a vacuum is the absence of matter in a volume of space . Contents showTocToggle("show","hide") 1 Vacuum ranges 2 Perfect vacuum 3 Partial vacuum 4 Degrees of vacuum 5 Creating...
http://www.allaboutall.info/article/Vacuum
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The vacuum brake is a braking system used on trains . It was invented in 1877 in the USA , where it enjoyed only a brief period of popularity, primarily on narrow gauge railroads . The system took a greater hold in the United Kingdom , being used there as the primary form of train braking until the 1970s. Vacuum braking is for all practical purposes now a dead technology...
http://www.allaboutall.info/article/Vacuum brake
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In General relativity , a vacuum solution is a Lorentzian manifold whose Einstein tensor vanishes identically. According to the Einstein field equation , this means that the stress-energy tensor also vanishes identically, so that no matter or non-gravitational fields are present. More generally, a vacuum region in a Lorentzian manifold is a region in which the Einstein tensor vanishes...
http://www.allaboutall.info/article/Vacuum solution (general relativity)
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A large vacuum chamber. A vacuum chamber is a device to create a partial vacuum , often to conduct physical experiments or test mechanical devices which must operate in outer space . This tool article is a stub . You can help Wikipedia by expanding it .
http://www.allaboutall.info/article/Vacuum chamber
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A vacuum pump is a pump that removes gas to leave behind a partial vacuum (of varying quality, depending on the pump). Various mechanisms can be used; sometimes more than one will be used (in series or in parallel ) in a single application. A partial vacuum can be created using a positive displacement pump that transports a gas load from an inlet port to an outlet (exhaust) port. Because...
http://www.allaboutall.info/article/Vacuum pump
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In simple terms, a False Vacuum is a state that appears like a vacuum but is really unstable. An analogy to a false vacuum would be a small bedsheet stretched tightly over a mattress. There is order, but if someone sat on the bed, the sheet would snap off. The state after the sheet snaps off would be analogous to an actual vacuum. A false vacuum is a theoretical metastable state of space...
http://www.allaboutall.info/article/False vacuum
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