Date: Mon, 25 Nov 2002 09:07:25 -0500

Author: Andrew Duffy

Subject: Brad's mystery loop


Hi Brad,

My money is on 7A50.40, the Vibrating Circular Wire.

Does the plug fit a Pasco mechanical vibrator? If so you're all set.


Andrew Duffy
Boston University

On Mon, 25 Nov 2002, Shue, Brad wrote:

> Another mystery demo question for everyone. It's a loop(15 cm dia) of
> fairly stout wire that has a spring with a fairly stout K over the top
> of it(the wire). This is mounted on a small shaft about the size of a
> banana plug. It's all soldered together at the plug. I've had all
> kinds of suggestions around here. Any suggestions?