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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.
The 2012 film Total Recall, features a smart refrigerator that is covered by a touchscreen which enables the user to leave notes and messages. Silicon Valley features a smart fridge that is bought by Jian-Yang, after the old refrigerator broke down in Season 4 episode, "The Patent Troll". The smart refrigerator is able to communicate in ...
Thousands of sets of high-powered magnetic balls sold at Walmart have been recalled after federal regulators issued a warning about the potential risk of choking, serious injuries and death.
The Fridge Gate method is a theoretical application of using a single logic gate to drive a refrigerator in the most energy efficient way possible without violating the laws of thermodynamics. It operates on the fact that there are two energy states in which a particle can exist: the ground state and the excited state.
The Einstein–Szilard or Einstein refrigerator is an absorption refrigerator which has no moving parts, operates at constant pressure, and requires only a heat source to operate. It was jointly invented in 1926 by Albert Einstein and his former student Leó Szilárd , who patented it in the U.S. on November 11, 1930 ( U.S. patent 1,781,541 ).
Magnetic levitation can be stabilised using different techniques; here rotation (spin) is used. Magnetic levitation (maglev) or magnetic suspension is a method by which an object is suspended with no support other than magnetic fields. Magnetic force is used to counteract the effects of the gravitational force and any other forces. [2]
A clothes line, also spelled clothesline, also known as a wash line, is a device for hanging clothes on for the purpose of drying or airing out the articles. It is made of any type of rope , cord, wire, or twine that has been stretched between two points (e.g. two posts), outdoors or indoors, above ground level.