News What is a Superconductor?

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Onnes was studying the electrical properties of mercury (the same substance that expands and contracts within thermometers) when he found that mercury’s electrical resistance disappeared at temperatures below 4.2 Kelvin (4.2 degrees Celsius).
4.2 kelvin is not 4.2 C. 4.2 kelvin = -268.95 C.

This is a good generalized article about superconductors and its implications to the tech industry, and even just electrical power distribution in general.
 
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