Fine Structure

Faster Rolling Cans

There exists a race so exclusive that there can be only two competitors. The first: an unopened can of Fresca, its tasty liquid still sloshing around inside. The second and final: a frozen can of Fresca, filled and frozen gradually until it is nothing more than a solid block of ice inside a thin aluminum shell.

THE START: top of the official SWANSONTEA treadmill
THE FINISH: the official SWANSONTEA floor

Who will win? FIND OUT at swansontea!

(I know I've really talked up the competition but don't completely discount the physical explaination at the end - it's non-intuitive and but easily understandable once you think about it)
http://blogs.scienceforums.net/swansont/archives/2066

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