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So, we've gotten to the point in the semester where the students are
finding things on the Internet they want me to explain -- in addition to
covering the 'normal' material.
One student found this:
https://www.youtube.com/watch?v=7KqOwJKWIAw
and wants me to explain how this is NOT a perpetual motion machine.
I think I can explain the chain one fairly well. I'm having trouble with
the liquid motion one, explaining it in terms of freshman physics.
Any suggestions would be welcome.
Peter Schoch
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