How super are superconductors?

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  • Approximately how cold do conventional superconductors have to get before they enter the superconducting state?

    • Superconductors only function at very cold temperatures, on the order of 39 K for conventional superconductors (the solid mercury wire that Kamerlingh Onnes used had to be cooled below 4.2 K) and below around 130 K for modern, high-temperature superconductors. As for absolute zero, it cannot be achieved artificially, although laser cooling has taken us within one billionth of a degree of it.
    • Superconductors only function at very cold temperatures, on the order of 39 K for conventional superconductors (the solid mercury wire that Kamerlingh Onnes used had to be cooled below 4.2 K) and below around 130 K for modern, high-temperature superconductors. As for absolute zero, it cannot be achieved artificially, although laser cooling has taken us within one billionth of a degree of it.
    • Superconductors only function at very cold temperatures, on the order of 39 K for conventional superconductors (the solid mercury wire that Kamerlingh Onnes used had to be cooled below 4.2 K) and below around 130 K for modern, high-temperature superconductors. As for absolute zero, it cannot be achieved artificially, although laser cooling has taken us within one billionth of a degree of it.

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