Ok this is just too cool.

[jalapeno]

http://blog.makezine.com/2011/12/14/dropping-a-magnet-through-a-copper-pipe/

 

[hard_r]

 

[Buddhaman]

Note to self, buy copper pipe and magnet! Then I shall rule over the other engineers at OU!

 

[mhphoto]

One of my favorite middle school experiments.

 

[Billybob]

I understood it had something to do with the "Hall effect", and is used in those flashlights that you shake and don't need batteries.

 

[mhphoto]

Here's another video.

 

[copertop80]

So what happens when you run the copper through the magnet.

 

[MLRyan]

so what happens when you run the copper through the magnet.

science!!

 

[Biggsly]

Very cool. Now I need to find a copper pipe.

 

[flatwins]

Really cool! I need something like this just to keep on the coffee table.