11.5.1

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Задание:

11.5.1 Questions&Statements 11B

Superconductor is a liquid material that abruptly looses all resistance to the flow of electric current when cooled below a characteristic temperature. Superconductivity is a state of matter that chemical elements, compounds and alloys assume on being cooled to temperatures near to absolute zero. Most of the known superconductors are non alloys. The zero point of the Kelvin scale is the temperature at which all molecular motion theoretically stops, sometimes called absolute zero. It is impossible for a compound to be superconducting even if the chemical elements constituting it are not. What temperature is defined as absolute zero on the Celsius scale by international agreement? How many chemical elements are known to be superconductors? What ability will a certain material likely assume when being cooled to temperatures near to absolute zero?

Решение: