7. Cryogenic liquids
Superconductivity is a very special state of certain materials in the solid state, whose 2 fundamental characteristics are :
a complete absence of electrical resistivity, which means they can conduct electricity without resistive losses;
perfect diamagnetism (Meissner effect), which refers to the phenomenon of total exclusion of all magnetic fields from the interior of a superconductor when it is brought to a temperature below its critical temperature.
This phenomenon was discovered by Kammerlingh Onnes in 1911, when he first observed it in mercury. This was made possible...
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Cryogenic liquids
Bibliography
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Main mineral oil producers
APAR Industries Limited
British Petroleum (BP)
Caltex Ltd
Calumet Speciality Products
Engen Petroleum Limited
Ergon
Esso Standard SAF
Gandhar Oil refining
Hydrodec Group Plc.
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