In the lecture hall yesterday, from left to right: A dewar of liquid nitrogen, a tube of racquetballs, a squeaky dog toy, a handful of yellow balloons, a vase of flowers, an inflated red balloon, an insulated glove, and a 4-liter jug of liquid nitrogen.
The dewars, the vase, the glove, and the dog toy survived the day.
More details, and video, tomorrow.
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Chad, where is the tube of KY-gelly?
These are physics props, not rugby props.
I recommend having also:
a) a high-TC superconductor and a magnet, so that you could show the Meissner effect (magnet levitating over the cooled superconductor)
b) a lead bell which changes tone after being cooled with LN
c) a red plastic ketchup bottle which changes color after being cooled with LN
People like this stuff :)
What, no ice cream? People never forget a lecture that they get nummy food out of.
Speaking from experience, you can use LOX to make ice cream, but you have to eat it within an hour. Thankfully, this isn't a problem.
(Why LOX instead of LN2? How many dewars are we going to haul around with us? LOX has more uses, esp in the "fwoosh" and "bang" realm.)