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| Results 31 - 40 of about 2523 for the
Vacuum
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| Exact Match: Vacuum |
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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 ultracentrifuge was invented by Edward Greydon Pickels. It was his contribution of the vacuum which allowed a reduction in friction generated at high speeds. Vacuum systems also enabled the maintenance of constant temperature . In 1946 , Pickels cofounded Spinco (Specialized Instruments Corp.) and marketed an ultracentrifuge based on his design. Pickels, however, considered...
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Vacuum casting is a means of casting small metal parts or jewelry that have fine detail or for casting various plastic materials. A porous or vented mold is used and is placed on a table or container where vacuum is applied. The liquid to be cast will be driven into the mold by atmospheric pressure, while the vacuum will also remove trapped air that would otherwise impede the...
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vacuum mattress and its manual pump A vacuum mattress (vacmat) is a medical device used for the immobilisation of patients, especially in case of vertebra , a pelvis or a limb trauma (especially for femur trauma), as well for hand transportation of patients on short distances (it replaces the stretcher ). It was invented by Loed and Haederlé, who called it "shell" mattress ( matelas...
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In quantum physics , if we expand about the Fock vacuum, the true vacuum contains short-lived "virtual" particle-antiparticle pairs which are created in pairs out of the Fock vacuum and then annihilate each other. Some of these particle-antiparticle pairs turn out to be charged, eg. virtual electron-positron pairs. Such charged pairs act as an electric dipole. In the presence of an electric field...
http://www.allaboutall.info/article/Vacuum polarization
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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...
http://www.allaboutall.info/article/Vacuum tube
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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...
http://www.allaboutall.info/article/Vacuum tube
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Vacuum grease is a lubricant with low volatility and is used for applications in low pressure environments. Lubricants with higher volatility would be evaporate, causing two problems: They would not be present to provide lubrication. They would make lowering the pressure below their vapor pressure difficult. This technology -related article is a stub . You can help Wikipedia...
http://www.allaboutall.info/article/Vacuum grease
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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...
http://www.allaboutall.info/article/Vacuum tube
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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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Also helps finding: vaxuum, vavuum, vakuum, vacyum, vacium, vachum, vacjum, vackum, vacaum, vacuym, vacuim, vacuhm, vacujm, vacukm, vacuam
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