Newsgroups: sci.physics.electromag Path: columba.udac.uu.se!sunic!pipex!uknet!EU.net!uunet!news.crd.ge.com!crd.ge.com!mallick From: mallick@crd.ge.com (John Mallick) Subject: Re: Free-floating magnet possible? Message-ID: Sender: mallick@proteus (John Mallick) Nntp-Posting-Host: proteus.crd.ge.com Reply-To: mallick@crd.ge.com Organization: GE Corp. Research And Development References: Date: Mon, 21 Mar 1994 14:49:05 GMT Lines: 36 In article , jad@harrierx.cdev.com (James A.Dahlberg 490TX) writes: |> In article mallick@crd.ge.com writes: |> >In article , jad@harrierx.cdev.com (James A.Dahlberg 490TX) writes: |> >|> In article roh@spot.Colorado.EDU (ROH JOHN J) writes: |> >|> >In article <2m7oeu$43l@agate.berkeley.edu>, |> >|> >Amnon Silverstein wrote: |> >|> >> Question: Can an object be made to float with magnets in such a way that |> >|> >> it is not touching anything? |> >|> |> >|> I read an article in Extraordinary Science, a publication of the |> >|>... |> |> >If you spin the conducting disks fast enough (so that the transit time of the |> >is less than the magnetic diffusion time of the conductor), then the material |> |> "... transit time of the ?????? is less than ..." Sorry about that... it should read "the transit time of the material past a magnetic pole". This dimensionless number is the "magnetic Reynolds number". |> |> >Nothing magic about this as far as I can see. |> |> Who said anything about magic? You're right. It's just that this device is nothing really special and its action can be explained easily in terms of well-known physical principles. -- .... .. .... .. .... .. .... .. .... .. .... .. John A. Mallick WA1HNL E-mail: mallick@crd.ge.com GE Corporate Research and Development Phone: (518)-387-7667 (W) Schenectady, NY 12301 FAX: (518)-387-6560 (W) .... .. .... .. .... .. .... .. .... .. .... .. "Work like hell. Tell everyone everything you know. Close a deal with a handshake. Have fun." --- "Doc" Edgerton