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Published on Feb 6, 2010
A simple experiment which shows how water with food coloring in it acts as it is dropped into a volume of oil (cooking oil in this case). Notice there perfect spheres as they descend due to gravity. Additionally, notice how when they reach the bottom and collide with another water sphere they do not immediately combine. This is due to the surface tension and orientation of the water molecules within the water sphere. Eventually thermal and mechanical motion will cause all of the different colored spheres to come together to form a distinct water phase. Check out "get your charge away from me 2" to see what happens when a surfactant like soap gets in the mix!