Why does water get that shape when poured out of a glass, almost like the nodes and antinodes of standing waves in a string? Also, the 'parts' of water (For want of a better term) seem to be perpendicular to each other, alternatively. I really think I'm doing a bad job of explaining this, if so, let me know? But why does this happen? Is it the interatomic forces between the water particles that contributes a sort of tension? Surface tension, perhaps? And if so, how does it explaint that the 'parts' are alternatively perpendicular to each other?