Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Magic_wheel> ?p ?o }
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- Magic_wheel abstract "The magic wheel, or magnetic wheel is a wheel that continues to spin for a long time after being started, and is one of the earliest examples of an attempt at a perpetual motion machine. This device was invented in medieval Bavaria. It looked like a wagon wheel spinning on an axle, affixed to a base. The superstitious population of the time believed it spun by the power of magic.The mechanism of the magic wheel used several large magnets (lodestones) affixed to the wheel's outside rim, like the seats of a Ferris wheel. Each magnet was backed by a lead plate "seat". An extra stationary magnet was affixed to the base. Each magnet on the wheel's rim was attracted to the magnet in the base on its downward approach, then prevented from turning over when the opposite pole of the magnet passed over in the wheel, thus being repelled upward. The magnets were not allowed to touch one another. This attraction-repulsion maintained inertia efficiently, similar to a flywheel, such that the wheel spun for a very long time and was thought supernatural by some.Incorrectly deemed by some to be a perpetual motion machine, the magic wheel eventually comes to a stop because of frictional losses at the central bearing. Proponents of free energy devices have advanced the theory that the lead plating interrupts the magnetic attraction between the rim magnets and the stationary magnet in sequence, thus permitting the wheel to continue turning and bring the next rim magnet into position. However, the presence of lead dampens magnetic fields equally in any directions (as a magnet's field lines must stay continuous from pole to pole), and the symmetry of closed forces in the system means that no interaction between rim magnets and the stationary magnets could generate the net increase in energy necessary to keep the wheel rotating.The magic wheel was an impressive invention for the Dark Ages, a time when even some European kings were illiterate. An early German woodcut depicts a magic wheel.".
- Magic_wheel wikiPageID "1857623".
- Magic_wheel wikiPageLength "2304".
- Magic_wheel wikiPageOutDegree "15".
- Magic_wheel wikiPageRevisionID "603859700".
- Magic_wheel wikiPageWikiLink Bavaria.
- Magic_wheel wikiPageWikiLink Bhxc4x81skaras_wheel.
- Magic_wheel wikiPageWikiLink Category:Perpetual_motion.
- Magic_wheel wikiPageWikiLink Dark_Ages_(historiography).
- Magic_wheel wikiPageWikiLink Ferris_wheel.
- Magic_wheel wikiPageWikiLink Flywheel.
- Magic_wheel wikiPageWikiLink History_of_perpetual_motion_machines.
- Magic_wheel wikiPageWikiLink Lead.
- Magic_wheel wikiPageWikiLink Lodestone.
- Magic_wheel wikiPageWikiLink Magnet.
- Magic_wheel wikiPageWikiLink Magnetic_field.
- Magic_wheel wikiPageWikiLink Middle_Ages.
- Magic_wheel wikiPageWikiLink Perpetual_motion.
- Magic_wheel wikiPageWikiLink Perpetual_motion_machine.
- Magic_wheel wikiPageWikiLink Zero-point_energy.
- Magic_wheel wikiPageWikiLinkText "magic wheel".
- Magic_wheel hasPhotoCollection Magic_wheel.
- Magic_wheel wikiPageUsesTemplate Template:Unreferenced.
- Magic_wheel subject Category:Perpetual_motion.
- Magic_wheel hypernym Wheel.
- Magic_wheel type Article.
- Magic_wheel type MeanOfTransportation.
- Magic_wheel type Article.
- Magic_wheel type Pseudophysic.
- Magic_wheel comment "The magic wheel, or magnetic wheel is a wheel that continues to spin for a long time after being started, and is one of the earliest examples of an attempt at a perpetual motion machine. This device was invented in medieval Bavaria. It looked like a wagon wheel spinning on an axle, affixed to a base.".
- Magic_wheel label "Magic wheel".
- Magic_wheel sameAs m.061jtk.
- Magic_wheel sameAs Q17102892.
- Magic_wheel sameAs Q17102892.
- Magic_wheel wasDerivedFrom Magic_wheel?oldid=603859700.
- Magic_wheel isPrimaryTopicOf Magic_wheel.