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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.
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 ...
For the small size applications, correlated magnets can be used in positioning devices, consumer electronics, magnetic couplings, and vehicle attachment. [4] Potential applications include attach and release work-holding mechanisms, magnetic separators, fluid seals and valves, motor and motion control, factory automation, prosthetics, security devices, and power generation.
An example of a permanent magnet formed from a ferromagnetic material is a refrigerator magnet. [ 2 ] Substances respond weakly to three other types of magnetism— paramagnetism , diamagnetism , and antiferromagnetism —but the forces are usually so weak that they can be detected only by lab instruments.
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).
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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