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You've all finally egged me on....
Then there is the "Egg of Columbus" demo that was done back in 1893 at the Chicago World's Fair by Nicola Tesla, et al. In this an egg made from copper or some similar conducting material is placed upon a platter with three coils under it. An adjustable frequency three-phase alternating current is admitted to the coils with the frequency being gradually increased. This will prompt the egg to begin to spin in the same direct as the phase rotation. Eventually the egg will spin fast enough to cause it to stand on end. Must have been cool to watch!
Anyone out there do this in the recent past? (last 20 years or so) I plan to try this myself sometime.
John Bowditch
Exhibits Director
Ann Arbor Hands-On Museum
220 East Ann Street
Ann Arbor, MI 48104
[log in to unmask]
> ----------
> From: patricia verheyden
> Reply To: Informal Science Education Network
> Sent: Wednesday, March 31, 2004 5:07 AM
> To: [log in to unmask]
> Subject: Re: egg science
>
> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related institutions.
> *****************************************************************************
>
> Every year during the easter period we have an egg demo
> besides the already mentioned experiments
>
> we have visitors stand on six whole eggs (put them in halve an egg box and
> place a plate on top of them, ask one of the visitors to carefully step onto
> it)
> or we ask visitors to estimate the strength of an egg: how many book, or
> packs of paer can I put on 4 egges before they break
>
> we also have an 'egg model': a small yellow balloon filled with liquid
> inside a transparant larger balloon, also filled with liguid: this alllows
> you to show what happens inside the spinning raw egg
>
> Patricia
>
> Patricia Verheyden
> manager of exhibits
> Technopolis
> Technologielaan
> 2800 Mechelen
> tel (32) (0)15 34 20 20
> fax (32) (0)15 34 20 10
> mailto [log in to unmask]
> http://www.technopolis.be
>
> De bovenvermelde berichten/tekst en bijlagen verbinden Stichting
> F.T.I/Technopolis op geen enkele wijze, tenzij anders werd overeengekomen
> bij een schriftelijke overeenkomst of tenzij zij later worden bevestigd bij
> een overeenkomstig de wettelijke voorschriften ondertekende brief. Evenmin
> kunnen Stichting F.T.I/Technopolis aansprakelijk worden gesteld op grond van
> de inhoud van deze berichten/tekst en bijlagen.
>
>
>
>
> -----Oorspronkelijk bericht-----
> Van: Cindy Chambers [mailto:[log in to unmask]]
> Verzonden: woensdag 31 maart 2004 2:52
> Aan: [log in to unmask]
> Onderwerp: Re: egg science
>
>
> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related
> institutions.
> ****************************************************************************
> *
>
> Also look at the strength of an egg shell's shape.
> Place four or more egg shell halves (open side down) on the floor and a
> board on top of the egg shells.
> How much weight can the board hold before the egg shells break?
> Depending on the number of egg shells you use, small children can stand on
> the board.
>
> Have fun and eggsperiment!
>
> Cindy Chambers
>
> Questacon Exhibition Services
> Postal address: PO Box E28 Kingston, ACT, 2604
> Street address: 95-97 Wollongong St, Fyshwick, ACT, 2609
> Canberra, Australia
> Phone 02) 6126 2223 Fax 02) 6126 2266
> Email [log in to unmask]
>
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> More information about the Informal Science Education Network and the
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