Whatever Floats Your Boat
Wednesday, December 10, 2008 - 12:56
in Physics & Chemistry
Is it magic? Is that aluminum foil boat floating on air? Well, no and no. What we literally don't see is that the bottom of that aquarium is filled with sulfur hexafluoride (SF6). Sulfur hexafluoride is a relatively nonreactive gas that has a density of about five times that of air. It's also transparent. read more