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Happy Atheist Forum

General => Science => Topic started by: Recusant on December 21, 2011, 03:03:34 AM

Title: Dropping a Magnet Through a Copper Pipe
Post by: Recusant on December 21, 2011, 03:03:34 AM
Nothing groundbreaking at all, but still a cool little video illustrating eddy current braking (http://en.wikipedia.org/wiki/Eddy_current_brake).

"Copper Pipe Magnet" (http://www.youtube.com/watch?feature=player_embedded&v=G7ysnXH53Wo)

This reminded me of the ferrofluid electromagnetic sculptures of Sachiko Kodama & Minako Takeno.

Morpho Towers (http://www.youtube.com/watch?v=Uqc-NB3dd7E)

Morpho Tower Spiral Swirl (http://www.youtube.com/watch?v=r7W7cTuvxtg&feature=related)
Title: Re: Dropping a Magnet Through a Copper Pipe
Post by: Tank on December 21, 2011, 08:40:29 AM
I remember seeing a demo of eddy currents at the Science Museum when I was a kid. One dropped a coin down a slot with some very powerful horse shoe magnets and coins slowed down as they passed through the magnets.
Title: Re: Dropping a Magnet Through a Copper Pipe
Post by: Too Few Lions on December 21, 2011, 04:52:40 PM
those ferrofluid sculptures are amazing, thanks for the links Recusant
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