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Ferromagnetism is a property of certain materials (such as iron) that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet. Ferromagnetic materials are noticeably attracted to a magnet, which is a consequence of their substantial ...
If the magnet is aligned with the magnetic field, corresponding to two magnets oriented in the same direction near the poles, then it will be drawn into the larger magnetic field. If it is oppositely aligned, such as the case of two magnets with like poles facing each other, then the magnet will be repelled from the region of higher magnetic field.
Like ferromagnetic substances, ferrimagnetic substances are attracted by magnets and can be magnetized to make permanent magnets. The oldest known magnetic substance, magnetite (Fe 3 O 4 ), is ferrimagnetic, but was classified as a ferromagnet before Louis Néel discovered ferrimagnetism in 1948. [ 2 ]
Magnets can be used in scrap and salvage operations to separate magnetic metals (iron, cobalt, and nickel) from non-magnetic metals (aluminum, non-ferrous alloys, etc.). The same idea can be used in the so-called "magnet test", in which a car chassis is inspected with a magnet to detect areas repaired using fiberglass or plastic putty.
The Soviet Army journal Red Star reported her stance in a piece headlined "Iron Lady Raises Fears", [116] alluding to her remarks on the Iron Curtain. [115] The Sunday Times covered the Red Star article the next day, [ 117 ] and Thatcher embraced the epithet a week later; in a speech to Finchley Conservatives she likened it to the Duke of ...
On Wednesday night's episode of TLC's "My Strange Addiction," a Florida woman says she's not in an addictive or an obsessive relationship. She's apparently with her soulmate. Which just so happens ...
It is time for the United States, the world’s oldest democracy, to elect an "Iron Lady" president. Haley is our nation’s best strategic choice next year. The electoral process starts in Iowa ...
The magnetic field of permanent magnets can be quite complicated, especially near the magnet. The magnetic field of a small [note 6] straight magnet is proportional to the magnet's strength (called its magnetic dipole moment m). The equations are non-trivial and depend on the distance from the magnet and the orientation of the magnet.