Magnet Through a Copper Pipe=AWESOMESAUCE!
My wife shared this with me.
I have GOT to find the right goodies and do this myself!!
http://www.youtube.com/watch?feature...&v=keMpUaoA3Tg
This Is What Happens When A Magnet Is Dropped Through A Copper Pipe
The Mind Unleashed
When a magnet is dropped down a conducting copper pipe, it feels a resistive force (assuming that magnets have feelings).
The falling magnet induces a current in the copper pipe and, by Lenz’s Law, the current creates a magnetic field that opposes the changing field of the falling magnet. Thus, the magnet is “repelled” and falls more slowly.