Family Quotes and Sayings â Family Day. âFamilies are like fudge â mostly sweet with a few nuts.â. âOur family is a circle of strength of love with every birth and every union the circle grows.â. âEveryone needs a house to live in, but a supportive family is what builds a home.â Â» Anthony Liccione. âYou donât choose your family.
Mercury was historically the first to show superconductivity, and it is an example of a Type I superconductor. Its practical usefulness is limited by the fact that its critical magnetic field is only 0.019 T, so the amount of electric current it can carry is also limited.
Superconductors are materials that conduct electricity with no resistance. This means that, unlike the more familiar conductors such as copper or steel, a superconductor can carry a current indefinitely without losing any energy.They also have several other very important properties, such as the fact that no magnetic field can exist within a superconductor. brief history of superconductors. The first discovery of a superconductive material took place in 1911 when a Dutch scientist named Heike Kammerlingh Onnes, who was also the first person to liquefy helium, and reached temperatures as low as 1.7 kelvin (K).