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Similar neat trick: to tell if an egg has been hard-boiled, spin it on its side. A raw egg will immediately stop rotating, a cooked one won't.
by nicolashahn 8y ago
Similar neat trick: to tell if an egg has been hard-boiled, spin it on its side. A raw egg will immediately stop rotating, a cooked one won't.
- nielsbot 8y agoRelevant: https://www.youtube.com/watch?v=HFDHFTffKTc https://www.youtube.com/watch?v=HFDHFTffKTc [Spinning Eggs - Mr. Wizard's Supermarket Science]
- maybecorrect 8y agoI thought the trick was you spin the egg, then stop it - a raw egg will continue to rotate because the fluid inside is moving, but a cooked egg won't restart because nothing inside it is moving. This link shows a hardboiled egg spinning on its end, but otherwise seems to agree with me, though it doesn't quite contradict you: http://www.planet-science.com/categories/experiments/magic-tricks/2012/03/spinning-eggs.aspx http://www.planet-science.com/categories/experiments/magic-t...