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This vacuum means "absence of matter" or "an empty area or space"; for the cleaning appliance, see vacuum cleaner. For the vacuum used in defining the MKS system of units, see free space.

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Wikipedia about vacuum

This vacuum means "absence of matter" or "an empty area or space"; for the cleaning appliance, see vacuum cleaner. For the vacuum used in defining the MKS system of units, see free space.

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A vacuum is a volume of space that is essentially empty of matter, such that its gaseous pressure is much less than atmospheric pressure. The word comes from the Latin term for "empty," but in reality, no volume of space can ever be perfectly empty. A perfect vacuum with a gaseous pressure of absolute zero is a philosophical concept that is never observed in practice. Physicists often discuss ideal test results that would occur in a perfect vacuum, which they simply call "vacuum" or "free space" in this context, and use the term partial vacuum to refer to real vacuum. The Latin term in vacuo is also used to describe an object as being in what would otherwise be a vacuum.

The quality of a vacuum refers to how closely it approaches a perfect vacuum. The residual gas pressure is the primary indicator of quality, and is most commonly measured in units called torr, even in metric contexts. Lower pressures indicate higher quality, although other variables must also be taken into account. Quantum theory sets limits for the best possible quality of vacuum, predicting that no volume of space can be perfectly empty. Outer space is a natural high quality vacuum, mostly of much higher quality than can be created artificially with current technology. Low quality artificial vacuums have been used for suction for many years.

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. 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.

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Uses

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Vacuums are commonly used to produce suction, which has an even wider variety of applications. The Newcomen steam engine used vacuum instead of pressure to drive a piston. In the 19th century, vacuum was used for traction on Isambard Kingdom Brunel's experimental atmospheric railway.

Search results for Vacuum

Vacuum cleaner - Wikipedia, the free encyclopedia

Most homes with carpeted floors in developed countries possess a vacuum cleaner for cleaning. ... 1905 "Griffith's Improved Vacuum Apparatus for Removing Dust ...en.wikipedia.org/wiki/Vacuum_cleaner

Halo UV Vacuum Cleaners

Halo Vacuums offers the first UV vacuum to clean and disinfect your home while you vacuum. ... Buy your Halo Vacuum now at Witbecks - Pay One Year Later with ...uv-vacuum.com/

Bissell

Get information about Bissell carpet cleaning products such as vacuums, carpet and hard floor cleaners, and cleaning formulas. Also provides user guides, replacement parts, retailer locator, and product registrations.www.bissell.com/

HowStuffWorks "How Vacuum Cleaners Work"

Vacuum cleaners have cleaned our homes for over a century. ... Central Vacuum Systems and Wet/Dry Vacs. Cyclone Vacuums and ... Vacuum Cleaner Image Gallery ...www.howstuffworks.com/vacuum-cleaner.htm

Vacuum-direct.com

Offers Dyson vacuum cleaners including models such as DC15 Animal, DC14, and DC07.www.vacuum-direct.com/

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News about Vacuum

Paul Krugman: A leadership vacuum

International Herald TribuneAt best, the financial bailout would buy some time to seek a real solution to the crisis.http://www.iht.com/articles/2008/10/03/opinion/edkrugman.php

Lorelei Kelly: Nature Abhors a Vacuum but so do Wingnuts: The Bailout and our National Security

HuffingtonPostConservative lip service to ideas like free markets and a strong defense produced neither. These "values" were never actually turned into priorities for policy making. http://www.huffingtonpost.com/lorelei-kelly/nature-abhors-a-...

Historic ship done in by modern vacuum

UPI GREENWICH, England, Sept. 30 (UPI) -- The fire that gutted Britain's historic Cutty Sark sailing ship was caused by a vacuum cleaner, an investigation into the blaze determined.http://www.upi.com/Top_News/2008/09/30/Historic_ship_done_in...

Leaf program to remain the same for now

The GazetteCEDAR RAPIDS and#8212; The city's long-used, rake-into-the-street, leaf pick-up program will live another year.The City Council earlier this year had agreed to end the in-the-street practice in favor of a program using newly-purchased vacuum equipment that would suck up leaves that people raked to the curb line but not into the street.June's flood, though, pushed equipment purchases back, and as ....http://www.gazetteonline.com/apps/pbcs.dll/article?AID=/2008...

Police blame vacuum cleaner for Cutty Sark blaze

AP via Yahoo! News A fire that tore through a famous 19th century British ship was likely caused by a vacuum cleaner used for renovation work bursting into flames, police said Tuesday.http://news.yahoo.com/s/ap/20080930/ap_on_re_eu/eu_britain_c...

News about Vacuum

John Armstrong: Wham! And he didn't even see it coming ...

New Zealand HeraldIt was a different story last week. John Key was on the right track, filling the political vacuum left by Labour's apparent indifference and inaction. He ran hard with the line that "firm leadership" was required to reduce the effect of the ... http://www.nzherald.co.nz/nz-election-2008/news/article.cfm?...

Seeing things in a new light with OLED technology

Austin American-StatesmanOsram Opto made them with an expensive, slow process known as vacuum deposition that has dominated OLED development so far. One virtue of this method is that it can be combined with the technologies that produce LCD displays to make full-color OLED ... http://www.statesman.com/business/content/business/stories/t...

Premier company's loss a devastating blow

Black Hills PioneerRAMVAC assembles vacuum pumps and air compressors for dental uses. DentalEZ has offered the employees the opportunity to relocate, but he said the general consensus of the employees was not to move at this time. “The majority of employees here were ... http://www.bhpioneer.com/articles/2008/10/12/news/northern_h...

WGC office in management vacuum

Gulf NewsDubai: The Middle East office of the World Gold Council (WGC), a non-profit organisation of the world's leading gold producers, has been operating for months without a managing director, Gulf News has learned. Sources within the council and the ... http://www.gulfnews.com/business/General/10250065.html

Indian mission to the moon set for October 22 launch

Gulf NewsAfter having sailed through thermal and vacuum tests that simulated the conditions in deep space last month, Chandrayaan-1 is coursing through the final stages of vibration tests at the ISRO Satellite Centre (ISAC) in Bangalore to determine the ... http://www.gulfnews.com/world/India/10251617.html

Search results for Vacuum

iRobot Corporation: About Roomba 500

iRobot ® Roomba ® Vacuum Cleaning Robots. Cleans routinely so you don't have to. Life happens in busy homes. Stay ahead of messy floors with the touch of a button!http://www.irobot.com/sp.cfm?pageid=122

Vacuum cleaner - Wikipedia, the free encyclopedia

A vacuum cleaner (in colloquial British English also hoover) is a device that uses an air pump to create a partial vacuum to suck up dust and dirt, usually from floors.http://en.wikipedia.org/wiki/Vacuum_cleaner

The Eureka Company

Welcome to the home page of the Eureka Company, manufacturer of Vacuum Cleaners and Floorcare equipment.http://www.eureka.com/

TheVacuumCenter.com - Vacuum Cleaners, Vacuum Bags, Vacuum Parts - The

TheVacuumCenter.com The Vacuum Center - your source for vacuum cleaners, vacuum cleaner bags, vacuum parts, vacuum belts, and other floor care products.http://thevacuumcenter.com/

Vacuum

For my poker passion I have finally found what i missed before: PokerTH a multiplatform and opensource Texas Hold’em Sofware so I can finally play with the same software on my ... http://vacuumdomain.net
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Videos found for Vacuum

Sewer Vacuum Called To Deal With Ci...

Sewer Vacuum Called To Deal With City Park AlgaeAlgae has become a big problem in City Park and the City of Denver says it will start essentially "vacuuming" the pond scum out of Ferril Lake, which sits inside the park. Jodi...Windows Media - Video

Japanese Vacuum Cleaner Commercial

Japanese Vacuum Cleaner CommercialThe Japanese sell vacuum cleaners with battling robots in this Ultraman style retro spot.Flash - Video

WALL?E Meets a Vacuum Vignette

WALL?E Meets a Vacuum VignetteWatch as Pixar's new lovable robot, WALL•E, gets "tangled up" with a magnet for the first time. Animation powerhouse Pixar launches into space with this Sci-Fi tale abou...Flash - Video

Vacuum used to free kitten

Vacuum used to free kittenFirefighters in East Lothian have rescued a kitten trapped in a drain pipe using a vacuum cleaner.Andrew Anderson reports.Video - Video

Leadership Vacuum in BoJ

Leadership Vacuum in BoJJapan's Upper House rejected Toshiro Muto's nomination as the next BoJ governor. Graham Davis, director, Japan at The Economist Intelligence Unit, talks to CNBC's Martin Soong and...Windows Media - Video

Videos found for Vacuum

Eureka Cordless, Rechargeable Vacuu...

Eureka Cordless, Rechargeable Vacuum Cleaner, 90 Series User Review...An upright cordless vacuum by Eureka. Videopinions are product reviews and demonstrations by the people who use them - in full motion video. Go to Expo TV at www.expotv.com to find more video product...flash: 0 MB w:400px - h:300px

Bissell Powerforce Bagless Vacuum U...

Bissell Powerforce Bagless Vacuum User Review 4537This is a review of the Bisssell Powerforce Bagless Vacuum. I really like this vaccumn. It really picks us messes well and Bissell has great customer service and stands behind their products. Videop...flash: 0 MB w:400px - h:300px

eureka wide track superlit vacuum U...

eureka wide track superlit vacuum User Review 1548It describes the functionality and efficiency of the vacuum cleaner Videopinions are product reviews and demonstrations by the people who use them - in full motion video. Go to Expo TV at www.expotv....flash: 0 MB w:400px - h:300px

Bissel Clearview Vacuum User Review...

Bissel Clearview Vacuum User Review 267My review of the Bissel Clearview vacuum cleaner. Videopinions are product reviews and demonstrations by the people who use them - in full motion video. Go to Expo TV at www.expotv.com to find more v...flash: 0 MB w:400px - h:300px

Arm Hammer Vacuum Free Foam Carpe...

Arm   Hammer Vacuum Free Foam Carpet Deodorizer User Review 4749...Arm Hammer Vacuum Free Form Carpet Deodorizer Videopinions are product reviews and demonstrations by the people who use them - in full motion video. Go to Expo TV at www.expotv.com to find more vid...flash: 0 MB w:400px - h:300px

Answers for Vacuum

T J

What is the best vacuum cleaner for getting up dog hair?

T JThe vacuum we use is Dyson "The Animal". We have 2 cats and 1 big dog, and it makes our carpet look brand new when we vacuum. Only downside, it is about $600.00
Meat Bot

What would happen if the vacuum is anti-gravitational and mass shields it instead of having it's own gravity?

Meat BotNow all you have to do is to pour your thoughts into a mathematical theory which can predict the orbits of planets, black hole, neutron stars and hopefully dark matter/dark energy, publish it and wait...
Daisy

How often have you bought a new vacuum. What is a good vacuum?

DaisyI've had the same vacuum for 15yrs, no repairs, no problems whatsoever. It's a Kirby, I know people complain about them being heavy but that is for a reason, they do last!:)
Jelly

Which/What vacuum that will clean up pet hair and shampoo my carpet also?

JellyThis is as close to what you want without purchasing two. Bissell 5200z Flip-It Hard Floor Wet/Dry Vacuum Cleaner
CountryGirl

If a vacuum is quiet does that mean that it is not as powerful?

CountryGirldo not get a dyson. seriously, don't. i've only read bad things, AND our trusted vacuum shop has a trade in one with a sign on it that says something like "not for sale, i wouldn't sell this crap." ...

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