/sci/ - Science & Math

>>9956835
Apart from the fact bodies of water, from a puddle, to a bath, to a lake etc are flat on the surface, they do not take the shape of the bottom of the container on its surface.

In a practical sense, periscopes on a submarine would be pretty useless with curved water, but make much more sense on flat water.

Water is also used in construction because it is flat and level.