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Euler's Disc
An Euler's Disc (pronounced "oiler") is a cool little science toy based on the physics of a spinning coin but uses a nearly frictionless surface to allow it to continue for a very long time. The disc spins faster and faster, eventually exceeding 2500 rpm, before coming to an abrupt stop.

You can even buy this neat little science toy for yourself to amuse your friends with.
276 views Jun 2, 2015
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