The Plastic Brain

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WANT!

Via scienceisbeauty:

This machine manipulates small spherical rare earth magnets, slicing one at a time from the end of a long chain, moving it around a bit, then dropping it back to re-connect at the tail end of the chain. It also demonstrates a little snippet of science called eddy currents. Watch how slowly the magnet falls through the aluminum tube compared to falling through air: the falling magnet generates an electrical current in the tube, and that current in turn generates a magnetic field that opposes the movement of the magnet, slowing it down dramatically.

Source: Marvelous Hand Cranked Machine for Rare Earth Ball MagnetsLaughing Squid

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Author: Rogan Tinsley

Biology, science and maths teacher with a PhD in Neuroscience and passion for education.

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