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A comment on What Happens When You Drop A Magnet Inside A Copper Tube [video]. Parent comment

Re:What Happens When You Drop A Magnet Inside A Copper Tube ... by IgorPartola on Monday February 03, 2014 @08:05PM (#7174787)
I forget what type we used but it was cooled by liquid nitrogen. That prof. used lots of magnets and superconductors in his research, some cooled by Helium-3. Now that stuff is expensive.
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Re:What Happens When You Drop A Magnet Inside A Copper Tube ... by fnordfnordfnord on Monday February 03, 2014 @11:13PM (#7175451)
The high-temperature ones were probably Yttrium-Barium-Copper-Oxides (YBCO) I've seen this demo done with them. The magnet's motion is almost undetectable, they appear suspended in the copper pipe until they start to warm up.
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