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The first working magnetic refrigerators were constructed by several groups beginning in 1933. Magnetic refrigeration was the first method developed for cooling below about 0.3 K (the lowest temperature attainable before magnetic refrigeration, by pumping on 3 He vapors).
These so-called ceramic magnets are cheap, and are widely used in household products such as refrigerator magnets. The maximum magnetic field B is about 0.35 tesla and the magnetic field strength H is about 30–160 kiloampere turns per meter (400–2000 oersteds). [33] The density of ferrite magnets is about 5 g/cm 3.
Early appliances included washing machines, water heaters, refrigerators, and sewing machines. The industry saw significant growth post-World War II, with the introduction of dishwashers and clothes dryers. By the 1980s, the appliance industry was booming, leading to mergers and antitrust legislation.
The recalled balls contain high-powered neodymium "rare earth" magnets, the CPSC said, which are far stronger than the typical magnets you'd find on a refrigerator, for example.
Early refrigerators could only be opened from the outside, making accidental entrapment a possibility, particularly of children playing with discarded appliances; many such deaths have been recorded. [1] [2] Modern designs have a magnetic closure that can be opened by pushing from the inside.
Here are some magnificent magnetic chore charts to keep your family motivated and on task. Assigning your kids household chores is a rite of passage, though it’s likely to be met with eye ...
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MagnaReady is an American clothing technology and e-commerce brand based in Raleigh, North Carolina. It focused on producing adaptive clothing for those with dexterity issues. It was founded in 2013 by Maura Horton, after her husband, Don Horton, had trouble buttoning his shirts due toParkinson's disease. MagnaReady uses patented magnetic shirt ...