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That's how it always is, Roger. It's fascinating to watch that boundarycut
sweep across the surface.
I have a thermocouple in the pool and watch the temperature drop from
room temperature. It goes to about -2 C or so, holds steady for a bit
and then poof - it's all over. Vent the system and pass the ice chunk
around.
Now do that same experiment, but replace the water with liquid nitrogen!
That is amazing to watch. Then try to pass the solid air chunk (sponge?
Mesh?) around... Try it... and let me know what you think.
You do have a ballast valve on your pump when you pump on water, right??
If so, open it up, it will save your pump!
Sam
-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu