... At the center is a metallic core, probably made of iron and iron sulfide, about 560 miles in radius, which is overlain by a mantle of partially molten rock and crust, according to JPL's Dr. John Anderson, team leader of Galileo's celestial mechanics ...
... iron contained a circulating current, turning it into a small magnet, and that in an ... iron is placed inside the coils, creating an "electromagnet"; that requires ... strongest magnets contain no iron, because the added benefit of iron inside an ...
... iron contained a circulating current, turning it into a small magnet, and that in an ... iron is placed inside the coils, creating an "electromagnet"; that requires ... magnets contain no iron, because the added benefit of iron inside an electromagnet ...
... If an iron ball was pulled down with a much greater force than a wooden one of the ... that the greater amount of substance in the iron ball had two different effects: it ...
... Until 1821, the only magnetism known was that of iron magnets . ... and of "lodestones", natural magnets of iron-rich ore. ... How can an iron magnet produce such changes? ...
... The ancient Greeks, originally those near the city of Magnesia, and also the early Chinese knew about strange and rare stones (possibly chunks of iron ore struck by lightning) with the power to attract iron. ...
... The ancient Greeks, originally those near the city of Magnesia, and also the early Chinese knew about strange and rare stones (possibly chunks of iron ore struck by lightning) with the power to attract iron. ...