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Re: Double Bounce Demo

ASTRO-BLASTER, by Fascinations (Seattle, WA, 1994). The card on the back
of the bubble packing has a blurb by Stirling A. Colgate, Astrophysicist
indicating the conservation of momentum in the collision is akin to the
effects of a gravitational collapse in a Supernova. The outer layers of
the star go to relativistic speeds, hence the name. Top ball goes to
5X the drop height, and it won't work if dropped off-vertical.

Mine hase 4 balls on the stick, drilled so only the top one flies off. It
came with 2 spare top balls for about $10. Can't recall which catalogue
I got it from, and it may have been purchased by someone else for me.

Dan M

Dan MacIsaac, Assistant Professor of Physics and Astronomy, Northern AZ Univ

I noticed that American Science and Surplus has a "double bounce" apparatus
in their latest catalog. It consists of a stack of, I believe, 5 drilled
super balls,
each smaller than the next, and a stick to keep them together. They claim,
and I don't
doubt, a very spectacular bounce of the top ball with a short drop.

At 05:42 AM 10/23/96 +0000, you wrote:
I understand from Roy Schwitters that the double bounce demo was "invented"
at Harvard, and the video clip won some bucks from the TV program.

Stanley J. McCaslin Inet:
Assistant Professor, Computer Science Phone:402/872-2208
Peru State College, Peru, NE 68421 Home: 402/872-7595

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