Date: Thu, 18 Mar 1999 16:37:56 -0800 (PST)
From: Jeff Erickson <jefferick@yahoo.com>
Subject: Re: Pinhole Digest #156 - 03/18/99
To: Pinhole Listserv <pinhole@exploratorium.edu>
Lou... I recall seeing the mousetrap/ping pong ball chain reaction
demo for the first time on a science film from the 60's entitled "Our
Friend the Atom," its a classic! Good hunting...
---Pinhole Listserv <pinhole@exploratorium.edu> wrote:
>
> Pinhole Digest #156 - Thursday, March 18, 1999
>
> chain rxn and Roman Numerials ??
> by "Lou Morton" <stf-lmorton@vom.com>
>
>
> ----------------------------------------------------------------------
>
> Subject: chain rxn and Roman Numerials ??
> From: Lou Morton <stf-lmorton@vom.com>
> Date: Wed, 17 Mar 1999 06:43:22 -0800
>
> Pinholers,
> A fellow teacher of mine says he recalls in college a science teacher
> telling him of a fabulous science demo on nuclear chain reactions: A
> large number of mouse traps (a room full covering the floor?) and then
> tossing a ping-pong ball on them and watching them all go off. Does
this
> sound familiar to anyone? I would like to try it. If every kid from
> every class brought in a pair, perhaps you could do it. Videotaping it
> might be a good plan due to the labor involved and to show instant
> replays.
> If someone has heard of this, or would like brainstorm the idea, I
would
> like to hear from you.
>
> Another question:
> We were discussing Roman Numerials in a math meeting the other day. I
> had this recollection of reading somewhere why they were still
important
> to know. Of course I couldn't cite a reference. Did I dream this up?
Is
> there a purpose beyond the academic exercise and a historical number
> system?
>
> thanks,
>
> Lou Morton, St Francis Solano, Sonoma
> e-mail: stf-lmorton@vom.com
>
>
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> End of Pinhole Digest
>
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