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    • #15378
      Profile photo of Andrew Normand

      Ferrofluid – a truly magnetic liquid. Ferrofluid is used commercially in dynamic seals and loudspeakers, but has only just become available for educational investigation. Very much a wow factor demo!

      Available from http://www.mutr.co.uk
    • #15379
      Profile photo of Andrew Normand

      Because it can stain and is usually wanted for demonstrations, it is now available in a bottle containing alcohol. (This allows a blob of ferrofluid full movement near a magnet but prevents it sticking to the glass wall).
      A strong magnet is needed to get the hedgehog effect. The oil does stain quite easily and badly!
      There are lots of good pictures on the web:
      for example.
      Themes: Magnetism

    • #15380
      Profile photo of Andrew Normand

      This video shows how to get some great shapes from it using very simple kit, but it just makes such as a mess! Beautiful, but really, really, messy… http://www.youtube.com/watch?v=1EuyZ5Lml4k

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