An excellent photographic example of gravity, cohesion and adhesion working together. While gravity is simply pulling the liquid down, cohesion is holding the drops together as adhesion keeps the drops atop the coin.The cohesion is a result of the protons and electrons of the liquid molecule being so strongly attracted to each other. A water molecule (which isn’t too far off from a 7up molecule) consists of two hydrogen atoms attached to a single oxygen atom, and is bent in an angle of 104°. This bend in the water molecule increases the overall polarity making the total polarity of the molecule stronger than that of the bond by itself.
Photographer: Six String Alex