Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Magdeburg hemispheres


Related Topics
996

In the News (Wed 30 Jul 14)

  
  Magdeburg - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-29)
Magdeburg, the capital city of the Bundesland of Saxony-Anhalt, Germany, lies on the Elbe river.
Magdeburg was one of the most important medieval cities of Germany.
973 Emperor Otto I dies and is buried in the cathedral of Magdeburg.
en.wikipedia.org /wiki/Magdeburg   (1070 words)

  
 magdeburg   (Site not responding. Last check: 2007-10-29)
1035 Magdeburg received a patent giving the city the right to hold trade exibits and conventions, the basis of the later family of city laws known as Magdeburg rights.
In the following years Magdeburg gains a reputation as a stronghold of Protestantism and it becomes the first major city to publish the writings of Martin Luther.
Magdeburg's most impressive building, the cathedral of Saints Catherine and Maurice, has a height of 104 m.
www.yourencyclopedia.net /magdeburg.html   (939 words)

  
 Otto von Guericke - Wikipedia, the free encyclopedia
Otto von Guericke (originally spelled Gericke) (born November 20, 1602 in Magdeburg, Germany, died November 11, 1686 in Hamburg, Germany, both dates according to the Julian calendar, according to the Gregorian calendar they are November 30 and November 21) was a German scientist, inventor, and politician (mayor of Magdeburg from 1646 to 1676).
Guericke had joined two copper hemispheres of 51 cm diameter (Magdeburg hemispheres) and pumped the air out of the enclosure.
Then he harnessed a team of eight horses to each hemisphere and showed that they were not able to separate the hemispheres.
en.wikipedia.org /wiki/Otto_von_Guericke   (349 words)

  
 MSN Encarta - Search Results - Magdeburg
Magdeburg, city in north central Germany, capital of the state of Saxony-Anhalt, on the River Elbe.
Magdeburg is an important river port and rail...
The first Protestant school of the humanistic type was established at Magdeburg in 1524.
uk.encarta.msn.com /Magdeburg.html   (95 words)

  
 Magdeburg hemispheres - Wikipedia, the free encyclopedia
The Magdeburg hemispheres were one of Otto von Guericke's most interesting experiments, designed to demonstrate the air pump he had invented.
The demonstration was presented to the Reichstag and the Emperor Ferdinand III in 1654 in Regensburg, where 30 horses, in two teams of 15, could not separate the hemispheres until the vacuum was released.
The original hemispheres are maintained by the Deutsches Museum in Munich.
en.wikipedia.org /wiki/Magdeburg_hemispheres   (402 words)

  
 AllRefer.com - Magdeburg, Germany (German Political Geography) - Encyclopedia
The city of Magdeburg obtained from them (13th cent.) a charter that was the model for hundreds of medieval town charters in Germany, Austria, Bohemia, and Poland.
Under this Magdeburg Law a town governed itself through an elected council, had its own courts of justice, and was exempt from all duties except the payment of rent to the prince of the land.
The city is the birthplace of Otto von Guericke (1602–86), the physicist and inventor of the Magdeburg hemispheres (which demonstrate air pressure); the composer G. Telemann (1681–1767); and Baron von Steuben (1730–94), the Prussian general who fought in the American Revolutionary War.
reference.allrefer.com /encyclopedia/M/Magdebur.html   (515 words)

  
 Magdeburg, Sack of - Hutchinson encyclopedia article about Magdeburg, Sack of   (Site not responding. Last check: 2007-10-29)
The Swedes had captured Magdeburg in 1629, holding the city with a small garrison until an Imperial force under Count Tilly arrived in early 1631.
He besieged it for five months, finally storming the city in May 1631 to forestall the arrival of Swedish reinforcements.
Magdeburg itself was set on fire, leaving only the cathedral standing.
encyclopedia.farlex.com /Magdeburg%2c+Sack+of   (148 words)

  
 Magdeburg Hemispheres   (Site not responding. Last check: 2007-10-29)
Magdeburg Hemispheres, a celebrated invention designed to show atmospheric pressure.
One of the hemispheres was fitted with a stopcock through which the inventor exhausted the air by means of an air-pump.
The force with which the hemispheres are held together may be obtained readily.
www.factopia.com /aiton-encyclopedia-vol3/magdeburg-hemispheres.htm   (169 words)

  
 Magdeburg Hemispheres   (Site not responding. Last check: 2007-10-29)
An evacuated Magdeburg hemisphere set supports a large stack of weights.
Evacuate Magdeburg hemispheres and try to separate them.
Separate the hemispheres by placing in a bell jar and evacuating.
demoroom.physics.ncsu.edu /html/demos/339.html   (95 words)

  
 Magdeburg Hemispheres
The two hemispheres have been fitted together and pumped out with the double-barrel vacuum pump, and the two boys are unable to pull them apart.
Magdeburg hemispheres from the latter part of the nineteenth century and the early part of the twentieth century were rarely marked with the name of the maker.
The handle on the side where the valve is located unscrews, allowing the hemispheres to be threaded onto the opening in the base plate of the vacuum pump.
physics.kenyon.edu /EarlyApparatus/Pneumatics/Magdeburg_Hemispheres/Magdeburg_Hemispheres.html   (509 words)

  
 Research Results For Ring In   (Site not responding. Last check: 2007-10-29)
The Magdeburg hemispheres were two bronze hemispheres made by Otto von Guericke in 1754, one of which had stopcock.
After the rims of these had been placed together with a greased leather ring in between to form an airtight joint the air was pumped out and the stopcock closed.
Before this was done the hemispheres could be pulled apart quite easily, since the pressure outside was balanced by an equal pressure inside.
www.probertencyclopaedia.com /cgi-bin/res.pl?keyword=Ring+In&offset=0   (367 words)

  
 Engineerin Pioneers - Otto von Guericke   (Site not responding. Last check: 2007-10-29)
He held the two hemispheres together and, using his pump and a non-return valve, he created a vacuum inside the hollow thus formed.
To demonstrate the strength of atmospheric pressure he harnessed several horses together and attempted to pull the hemispheres apart which, of course, could not be achieved until air was allowed to fill the vacuum.
Otto von Guericke died in Hamburg in 1686 and was buried in Magdeburg.
basil.acs.bolton.ac.uk /~mjh1hlc/vonguer.htm   (268 words)

  
 i3-01   (Site not responding. Last check: 2007-10-29)
Ropes on the two hemispheres allow two groups of students to attempt to pull the hemispheres apart against the force produced by the atmospheric air pressure.
The hemispheres have a diameter of about 5 inches, thus requiring a force of over 250 pounds to separate them when fully evacuated.
Close the valve and remove the vacuum connection before attempting to pull the hemispheres apart.
www.fiu.edu /~phydemo/i3-01.htm   (136 words)

  
 Magdeburg Hemispheres   (Site not responding. Last check: 2007-10-29)
Two hemispheres fit together and pull apart easily until the air is sucked out from between them.
Magdeburg hemispheres are two half-spheres of equal size.
Attach one spring scale to each hemisphere, then use the spring scales to pull the hemispheres apart.
apwww.stmarys.ca /demos/content/fluids/magdeburg_hemispheres/magdeburg_hemispheres.html   (313 words)

  
 Pressure   (Site not responding. Last check: 2007-10-29)
Shown is a small demonstration replica of the original Magdeburg hemispheres.
If a small vacuum pump can remove half of the air, then the force required to pull the hemispheres apart would be about 780 Newtons or 175 pounds.
He fashioned two hemispherical iron vessels which could be put together to form an airtight enclosure 22 inches in diameter.
hyperphysics.phy-astr.gsu.edu /hbase/Kinetic/pmdg.html   (142 words)

  
 Travel Forum - Magdeburg, Germany   (Site not responding. Last check: 2007-10-29)
11-29-2004, 07:44 PM Magdeburg, the capital city of the Bundesland of Saxony-Anhalt, Germany, lies on the Elbe river.
* 973 Emperor Otto I dies and is buried in the cathedral of Magdeburg.
* 1035 Magdeburg received a patent giving the city the right to hold trade exibits and conventions, the basis of the later family of city laws known as Magdeburg rights.
www.ttgforum.com /archive/index.php/t-352.html   (937 words)

  
 Deutsches Museum Bonn: Meisterwerke   (Site not responding. Last check: 2007-10-29)
He hitched a team of eight horses to each hemisphere, but they were not strong enough to separate them.
The weight of the air acting on the hemispheres &emdash; atmospheric pressure &emdash; exerted a greater force.
In 1663 von Guericke repeated his spectacular experiment with the "Magdeburg hemispheres" for the Elector of Brandenburg in Berlin, this time using 24 horses.
www.deutsches-museum-bonn.de /ausstellungen/meisterwerke/halbkugeln/default_e.html   (410 words)

  
 Untitled Page
By placing the two hemispheres together and pumping the air out of them, the hemispheres were stuck firmly together.
So firmly that in Magdeburg (hence the name!) Guericke was able to have a team of horses pull on each half, without the hemispheres separating.
Consequently the Magdeburg hemispheres were an indispensable item in his theatre.
www.museumboerhaave.nl /collectie/e_voorwerpen/maagdenburg.html   (133 words)

  
 Adventures in CyberSound: Name, First Name   (Site not responding. Last check: 2007-10-29)
Using a piston in a cylinder, he also showed that when a vacuum was created on one side of the piston, the atmosphere would move the piston and a considerable mass through a distance, thus performing work.
In 1631 he became an engineer in the army of Gustavus II Adolphus of Sweden, and from 1646 to 1681 he was bürgermeister (mayor) of Magdeburg and magistrate for Brandenburg.
He was elected one of the four rotating mayors of Magdeburg in 1646 and remained one of the mayors until 1676.
www.acmi.net.au /AIC/VON_GUERICKE_BIO.html   (1274 words)

  
 Magdeburg hemispheres -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-29)
The Magdeburg hemispheres were one of (Click link for more info and facts about Otto von Guericke) Otto von Guericke's most interesting (The act of conducting a controlled test or investigation) experiments, designed to illustrate the principle of (The pressure exerted by the atmosphere) air pressure.
They were two hollow hemispheres a little over a foot in diameter which fitted together so well that the air could be (A mechanical device that moves fluid or gas by pressure or suction) pumped out from between them.
The pressure of the surrounding (The envelope of gases surrounding any celestial body) atmosphere then held them together firmly.
www.absoluteastronomy.com /encyclopedia/m/ma/magdeburg_hemispheres.htm   (161 words)

  
 Comments about Magdeburg Hemispheres Reenactment
Briefly, the first three attempts to separate the hemispheres were not successful, but on the fourth try, the horses were able to separate the two halves of the chamber.
As designers of the modern hemispheres, we were so acutely aware of the possibility of embarrassment despite the use of only three horses on each side that safety chains were provided to prevent injury to the horses or to their handlers in case the half-chambers flew through the air after separation.
First, to be reasonably close to the original (20 in.), especially because of smaller number of horses used; second, because we wanted the hemispheres to be light enough for handling during the demonstrations.
www2.avs.org /historybook/links/magden.htm   (1199 words)

  
 Magdeburg hemispheres - Encyclopedia Glossary Meaning Explanation Magdeburg hemispheres   (Site not responding. Last check: 2007-10-29)
Magdeburg hemispheres - Encyclopedia Glossary Meaning Explanation Magdeburg hemispheres.
Here you will find more informations about Magdeburg hemispheres.
The Magdeburg hemispheres were one of Otto von Guericke's most interesting experiments, designed to illustrate the principle of air pressure.
www.encyclopedia-glossary.com /en/Magdeburg-hemispheres.html   (159 words)

  
 Historical Scientific Instrument Gallery   (Site not responding. Last check: 2007-10-29)
When the two hemispheres are placed together and the interior evacuated, it takes an unexpectedly large force to pull them apart.
This was first demonstrated by Otto von Guericke (1602-1686) who was the Mayor of Magdeburg, Germany.
He invented the vacuum pump and gave a spectacular public demonstration in 1654 using larger hemispheres and two teams of horses.
www.unl.edu /histinstr/heat.html   (482 words)

  
 [No title]   (Site not responding. Last check: 2007-10-29)
1815 After the Napoleonic Wars Prussia sets up the province of Prussian Saxony, with Magdeburg as its capital.
1945 During World War II Magdeburg suffers almost totally destruction due to Allied air raids.
Monuments: the city has monuments depicting emperor Otto I (old marketplace, 1240) and Otto von Guericke (1907).
www.online-encyclopedia.info /encyclopedia/m/ma/magdeburg.html   (763 words)

  
 Magdeburg explained   (Site not responding. Last check: 2007-10-29)
View of Magdeburg with the [[cathedral, from the tower of the Johanniskirche]] Magdeburg, the capital city of the Bundesland of Saxony-Anhalt, Germany, lies on the Elbe river.
The city center is rebuilt near exclusively in a modern style, rejecting Madgeburg's millennia spanning history.
Inside of the Cathedral of Magdeburg, looking towards the Grave of Otto I (Main article : Cathedral of Magdeburg) Magdeburg's most impressive building, the cathedral of Saints Catherine and Maurice, has a height of 104 m.
www.wordspider.net /ma/magdeburg.html   (1173 words)

  
 B.9.10 Magdeburg hemispheres   (Site not responding. Last check: 2007-10-29)
Concept: The air is pumped out from inside the two hemispheres.
Two volunteering students try to separate them unsuccessfully.
Apply small amount of vacuum grease on the rims of the hemispheres for better success.
demo.pa.msu.edu /showDemo.asp?DID=DID140   (34 words)

  
 Otto Von Guericke   (Site not responding. Last check: 2007-10-29)
After to have joined two metallic hemispheres with a leather gasket, with his pump pulled out the air from the sphere interior (trought a valve).
The air weight, not balanced, compressed the two hemispheres one against the other.
The two hemispheres cames off as just the air leaved enter into them.
www.tau.ac.il /~phchlab/experiments/vacuum/guericke.html   (216 words)

  
 Magdeburg Hemispheres   (Site not responding. Last check: 2007-10-29)
To evacuate the hemispheres it is necessary to unscrew the handle on one end.
It is instructive and amusing to allow the students to attempt to separate the two parts of the container after it has been evacuated.
These hemispheres were first demonstrated in Magdeburg in 1654 by Otto Van Guericke who attached two teams of eight horses to them.
physicsnt.clemson.edu /physdemo/2/demos/Bmagdeb2.htm   (176 words)

  
 Atmospheric Pressure 2B30.30   (Site not responding. Last check: 2007-10-29)
The hemispheres are sealed with an O-ring and are evacuated with a pump or by sucking on the hose (more dramatic).
When the system is evacuated, the hemispheres cannot be separated (easily).
An additional demo would be to place the hemispheres in a bell jar and evacuate that.
groups.physics.umn.edu /demo/fluids/2B3030.html   (75 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.