🚀 go-pugleaf

>
> The one demonstration I recall from freshman physics at Clarkson
> University was one similiar to the previous discussion about dropping
> a magnet down a long pipe.  The difference in this demo is that the
> pipe was supercooled with liquid nitrogen.  This caused the magnet to
> move very slowly through the pipe (almost stopping).  At the time, I
> thought it was an interesting demonstration, and I think it would get
> students thinking about what happens.

I did not even need to supercool my Cu pipe - the first time I set up this
demo.  I used a standard IRON metal clamp to attach the pipe to the lab
table.  The magnet never did hit the floor! <grin>  Fortunately I was
doing this BEFORE the students came into the room.

Lowell