Date: Fri, 22 Nov 2002 09:37:38 -0500 (EST)

Author: Michael McFarland

Subject: Re: Spherical Magnets

Post:

Zig,

It is a cool demo! For one thing, it's relatively hard to break something
made in the form of a cylinder.

The length is up to us - weight, bulkiness and cost limit it's length.
But wouldn't want it to be too short, either - the magnet gets room to
roll.

It sounds very cool!

Mike

* * * * * * * *

Mike McFarland
Resources for Instructional Labs and Lectures

mmcfarla@nd.edu
Physics, University of Notre Dame

225 Nieuwland Science Hall
Notre Dame, IN 46556-0338

(574) 631-7057
(574) 631-5952 (FAX)

(574) 254-3036 (Pager: at the beeps, enter the number that I should call.
Or, in NSH, enter the number of the room in which you need assistance.)

On Thu, 21 Nov 2002, Zigmund J. Peacock wrote:

> Tappers, I just finished making what I think is a cool idea for the
> 3/4" spherical magnets.
> I took a couple of feet of 1.5" ID acrylic tube and machined caps
> for the ends. Then glued a 1/4" x 1.5 circle of Sorbathane to the caps.
> Inside the tube I put a length of 1" x 1" x 1/8" Aluminum angle and
> a Spherical magnet.
> "Ta Da" I have a lens law tube that can be passed around, that the
> students can see up close and personal.
> More importantly the little beggers can't swipe the magnet, lose
> the magnet, or worse get it covered with debris from the floor.
> I post a photo Vacek's site. Zig
> --
> Zigmund J. Peacock
> WWW.physics.utah.edu/people/staff/peacock.html
> University of Utah/Physics
> peacock@physics.utah.edu
> 115 SOUTH 1400 EAST #201 Tel 801 581 6602
> SALT LAKE CITY UT 84112-0830 Fax 801 581 4801
>
> "We sleep safely in our beds because rough men stand ready in
> the night to do violence to those who would do us harm"
> -- George Orwell
>
> "All that is necessary for the triumph of evil is that good
> men do nothing!"
> -- Edmund Burke
>
>

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