Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Vacuum> ?p ?o }
- Vacuum abstract "Vacuum is space void of matter. The word stems from the Latin adjective vacuus for \"vacant\" or \"void\". An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure. Physicists often discuss ideal test results that would occur in a perfect vacuum, which they sometimes simply call \"vacuum\" or free space, and use the term partial vacuum to refer to an actual imperfect vacuum as one might have in a laboratory or in space. In engineering and applied physics on the other hand, vacuum refers to any space in which the pressure is lower than atmospheric pressure. The Latin term in vacuo is used to describe an object as being in what would otherwise be a vacuum.The quality of a partial vacuum refers to how closely it approaches a perfect vacuum. Other things equal, lower gas pressure means higher-quality vacuum. For example, a typical vacuum cleaner produces enough suction to reduce air pressure by around 20%. Much higher-quality vacuums are possible. Ultra-high vacuum chambers, common in chemistry, physics, and engineering, operate below one trillionth (10−12) of atmospheric pressure (100 nPa), and can reach around 100 particles/cm3. Outer space is an even higher-quality vacuum, with the equivalent of just a few hydrogen atoms per cubic meter on average. According to modern understanding, even if all matter could be removed from a volume, it would still not be \"empty\" due to vacuum fluctuations, dark energy, transiting gamma rays, cosmic rays, neutrinos, and other phenomena in quantum physics. In the electromagnetism in the 19th century, vacuum was thought to be filled with a medium called aether. In modern particle physics, the vacuum state is considered the ground state of matter.Vacuum has been a frequent topic of philosophical debate since ancient Greek times, but was not studied empirically until the 17th century. Evangelista Torricelli produced the first laboratory vacuum in 1643, and other experimental techniques were developed as a result of his theories of atmospheric pressure. A torricellian vacuum is created by filling a tall glass container closed at one end with mercury, and then inverting the container into a bowl to contain the mercury.Vacuum became a valuable industrial tool in the 20th century with the introduction of incandescent light bulbs and vacuum tubes, and a wide array of vacuum technology has since become available. The recent development of human spaceflight has raised interest in the impact of vacuum on human health, and on life forms in general.".
- Vacuum thumbnail Kolbenluftpumpe_hg.jpg?width=300.
- Vacuum wikiPageExternalLink 970603.html.
- Vacuum wikiPageExternalLink www.avs.org.
- Vacuum wikiPageExternalLink vacuum.html.
- Vacuum wikiPageExternalLink jvsta.
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- Vacuum wikiPageExternalLink ep9_QT.shtml.
- Vacuum wikiPageExternalLink index.php?title=Main_Page.
- Vacuum wikiPageExternalLink event.asp?PageId=4&EventId=258.
- Vacuum wikiPageExternalLink StructVacuumE.pdf.
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- Vacuum wikiPageRevisionID "706524755".
- Vacuum wikiPageWikiLink Acclimatization.
- Vacuum wikiPageWikiLink Action_at_a_distance.
- Vacuum wikiPageWikiLink Adhesive.
- Vacuum wikiPageWikiLink Aether_(classical_element).
- Vacuum wikiPageWikiLink Aether_(mythology).
- Vacuum wikiPageWikiLink Air_embolism.
- Vacuum wikiPageWikiLink Al-Biruni.
- Vacuum wikiPageWikiLink Al-Farabi.
- Vacuum wikiPageWikiLink Alhazen.
- Vacuum wikiPageWikiLink Altitude_sickness.
- Vacuum wikiPageWikiLink Aluminium.
- Vacuum wikiPageWikiLink Ancient_Greece.
- Vacuum wikiPageWikiLink Ancient_Greek_philosophy.
- Vacuum wikiPageWikiLink Aristotle.
- Vacuum wikiPageWikiLink Astronomer.
- Vacuum wikiPageWikiLink Atmosphere.
- Vacuum wikiPageWikiLink Atmosphere_(unit).
- Vacuum wikiPageWikiLink Atmosphere_of_Mars.
- Vacuum wikiPageWikiLink Atmospheric_pressure.
- Vacuum wikiPageWikiLink Atmospheric_railway.
- Vacuum wikiPageWikiLink Atomism.
- Vacuum wikiPageWikiLink August_Toepler.
- Vacuum wikiPageWikiLink Automobile_accessory_power.
- Vacuum wikiPageWikiLink Bar_(unit).
- Vacuum wikiPageWikiLink Barometer.
- Vacuum wikiPageWikiLink Barotrauma.
- Vacuum wikiPageWikiLink Bellows.
- Vacuum wikiPageWikiLink Bishop.
- Vacuum wikiPageWikiLink Black-body_radiation.
- Vacuum wikiPageWikiLink Black_hole.
- Vacuum wikiPageWikiLink Blaise_Pascal.
- Vacuum wikiPageWikiLink Blasius_of_Parma.
- Vacuum wikiPageWikiLink Blood.
- Vacuum wikiPageWikiLink Boiling_point.
- Vacuum wikiPageWikiLink Brake.
- Vacuum wikiPageWikiLink Brazing.
- Vacuum wikiPageWikiLink Car.
- Vacuum wikiPageWikiLink Cartesian_coordinate_system.
- Vacuum wikiPageWikiLink Category:Articles_containing_video_clips.
- Vacuum wikiPageWikiLink Category:Concepts_in_physics.
- Vacuum wikiPageWikiLink Category:Gases.
- Vacuum wikiPageWikiLink Category:Industrial_processes.
- Vacuum wikiPageWikiLink Category:Nothing.
- Vacuum wikiPageWikiLink Category:Vacuum.
- Vacuum wikiPageWikiLink Cathode_ray_tube.
- Vacuum wikiPageWikiLink Characteristic_impedance.
- Vacuum wikiPageWikiLink Chemical_vapor_deposition.
- Vacuum wikiPageWikiLink Classical_electromagnetism.
- Vacuum wikiPageWikiLink Cold_cathode.
- Vacuum wikiPageWikiLink Cold_welding.
- Vacuum wikiPageWikiLink Condemnations_of_1210–1277.
- Vacuum wikiPageWikiLink Configuration_space.
- Vacuum wikiPageWikiLink Consciousness.
- Vacuum wikiPageWikiLink Constitutive_equation.
- Vacuum wikiPageWikiLink Cosmic_background_radiation.
- Vacuum wikiPageWikiLink Cosmic_ray.
- Vacuum wikiPageWikiLink Coulombs_law.
- Vacuum wikiPageWikiLink Crookes_radiometer.
- Vacuum wikiPageWikiLink Cryopump.
- Vacuum wikiPageWikiLink Dachau_concentration_camp.
- Vacuum wikiPageWikiLink Dark_energy.
- Vacuum wikiPageWikiLink Decompression_sickness.
- Vacuum wikiPageWikiLink Dichotomy.
- Vacuum wikiPageWikiLink Dirac_equation.
- Vacuum wikiPageWikiLink Dirac_sea.
- Vacuum wikiPageWikiLink Drag_(physics).
- Vacuum wikiPageWikiLink Dry_etching.
- Vacuum wikiPageWikiLink Dynamic_pressure.
- Vacuum wikiPageWikiLink Eardrum.
- Vacuum wikiPageWikiLink Ebullism.
- Vacuum wikiPageWikiLink Einstein_field_equations.
- Vacuum wikiPageWikiLink Electric_displacement_field.
- Vacuum wikiPageWikiLink Electric_field.
- Vacuum wikiPageWikiLink Electric_potential.
- Vacuum wikiPageWikiLink Electromagnetism.
- Vacuum wikiPageWikiLink Electron_beam_welding.
- Vacuum wikiPageWikiLink Electron_microscope.
- Vacuum wikiPageWikiLink English_language.
- Vacuum wikiPageWikiLink Evangelista_Torricelli.
- Vacuum wikiPageWikiLink Evaporation.
- Vacuum wikiPageWikiLink Experiment.
- Vacuum wikiPageWikiLink Extremophile.