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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).
A collection of refrigerator magnets A refrigerator magnet displaying a sexual assault hotline's telephone number. A refrigerator magnet or fridge magnet is a small magnet, often attached to an artistic or whimsical ornament, which may be used to post items such as shopping lists, Christmas cards, child art or reminders on a refrigerator door, or which simply serves as decoration.
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.
A magnet's magnetic moment (also called magnetic dipole moment and usually denoted μ) is a vector that characterizes the magnet's overall magnetic properties. For a bar magnet, the direction of the magnetic moment points from the magnet's south pole to its north pole, [ 15 ] and the magnitude relates to how strong and how far apart these poles ...
Wooly Willy is a toy in which metal filings are moved about with a magnetic wand to add features to a cartoon face. [1] The toy was originally manufactured in Smethport, Pennsylvania and was launched on the toy market in 1955. It remains in production as of 2016. [2] Funny Face, Betty Brunette, and Dapper Dan were similar toys.
Because the tops have magnets only at the corners, there's a slight gap in the center between the top and the frame — but it's not noticeable to you as the wearer and barely noticeable to onlookers.
Magnetic Poetry is a toy and creative writing aid consisting of individual words—often related to a particular theme or topic—printed on small magnets which can be creatively arranged into poetry on a refrigerator or other metal surface. [1] The informality and spontaneity Magnetic Poetry has endeared it to educators in creative writing. [2]
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