Diet Coke Floats

If you place both a can of regular Coke and a can of Diet Coke in water, the Coke will tend to sink while the Diet Coke will tend to float. Do you know why?

It turns out that the sugar in the regular Coke adds just enough to the density of a regular Coke to make the can sink. The artificial sweetener in the Diet Coke is less dense, just enough to allow the Diet Coke to float.

Try it!