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ferrofluid demo

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Uploaded by on Nov 22, 2009

A ferrofluid: oleic acid, Fe3O4 (magnetite) in a test tube filled with water. The ferrofluids behavior can be controlled by using an external magnet. Oleic acid has a density lower than water. When magnetite is suspended in the oleic acid it increases the density. Does that explain the fluid's behavior in and out of a magnetic field?

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  • Probably Oleic Acid - I sell it on eBay & Etsy and alot of people buy it for this purpose =)

    Anita @ModelSupplies

  • hey ,really nice...what is the other liquide? i tried a lot of things, but can´t find a liquid wich is absorbing the ferrofluid like this.

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