Date: Thu, 07 Nov 2002 13:48:56 -0500

Author: Gerald Zani

Subject: Re: mod on eddy current

Post:

Sam,

Thanks for the Just-In-Time idea. My Fac really liked it and will use it
tomorrow. Jerry


At 10:35 AM 11/7/2002 -0500, you wrote:
>I bought some of those cool NdFeB magnetic spheres for various demos.
>Here's a way cooler way to show the Eddy current tube.
>
>First, roll the ball down a long piece of flat plastic. It's not very
>spectacular, you get just what you expect. Then roll it down a long
>piece of copper. I'm using a piece of 1/8" x 8" x 36" OFHC. The ball
>very slowly rolls down the new incline. Repeat this several times until
>the copper is vertical. It's just too cool!
>
>The sheet is much cheaper than the thick walled tube, and much lighter
>too.
>
>Sam

Gerald Zani e-mail: Gerald_Zani@brown.edu
Manager of Demonstrations phone: (401) 863-3964
Department of Physics FAX: (401) 863-2024
Brown University Providence, RI 02912-1843 USA

URL http://www.physics.brown.edu/users/staff/zani/index.html
URL http://www.physics.brown.edu/Studies/Demo/

Do a little more of that work which you have confessed to be good,
Which you feel that society and your most Just Judge rightly demand of you.
Cultivate the tree which you have found to bear fruit in your soil.
If you have any experiments you would like to try, try them.
Now's your chance.
Henry David Thoreau, Journal entry, 1850.