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This single pulse of heat leaves the superfluid mostly unaffected by the momentary rise in temperature. Instead of heating from bottom to top, waves of heat move up through the fluid, but the superfluid stays cool. That's very convenient. The Large Hadron Collider uses liquid helium to cool its magnets. As the superfluid helium circulates, its unique response to heat allows it to gain only 0.1 K for every kilometer it travels. Without this property of helium, the LHC wouldn't work.
.......Goldberg and Berna point out that it’s unclear whether the cave’s inhabitants knew how to start a fire from scratch or depended on flames harvested from grass fires outside the cave. If they were eating barbecue, it may have been only an occasional luxury. Whether that could have had an impact on human development remains an open question.
I take it you didn't watch the video all the way to the end? By the way I had the same question/objection while I was watching the video.
originally posted by: Soylent Green Is People
I'm a bit confused about the flow through the first ceramic capillary (the first experiment). If the Helium 2 was in two components (a normal viscosity fluid plus a zero viscosity super fluid, as shown by the spinning in the 2nd experiment), then how did the normal component get through the fine ceramic capillary in the first experiment?
Did the zero viscosity component somehow allow the normal viscosity component to get through?
originally posted by: Soylent Green Is People
a reply to: Arbitrageur
Ha! I should have added I didn't watch it to the end, until now. However, that bothered me enough at the time to take the time to post the question before needing to leave.
As I was gone (away from my computer), I was thinking that possibly I should have watched the whole thing before commenting, but I didn't.
I suppose my impatience got me into trouble