Web edition: October 2, 2012
Eventually, that watched pot will boil. But before it does, the water will seem to get excited. The tiny bubbles that form on the bottom of the pot will float up to the surface and pop. Then more bubbles will form, and more and more — until they look like jets of miniature pearls racing to the water’s surface. Those bubbles form when the pot sizzles enough to turn water into steam — but before the water itself is hot enough to boil.
Now scientists have found a way to boil water without those initial tiny bubbles.
R. Ehrenberg. Water boils sans bubbles. Science News, Vol. 182, October 6, 2012, p. 16. [Go to]