SUPER CONDUCTORS

[postlink]http://vids-in-tech.blogspot.com/2010/05/super-conductors.html[/postlink]http://www.youtube.com/watch?v=0LHLoCtE_sMendofvid [starttext] This is an excellent demo of super conductivity. The liquid is liquid nitrogen. The disk is a magnet. The black block is the super conducting (SC) material (but becomes SC only below its critical temperature, somewhat higher than liquid nitrogen). [endtext]