Funny how physics balances out

Part of the 'simplicity' or physics is that things always seem to be balancing themselves out. Gravitational mass is the same as inertial mass for example. When scientists filled a pool with slime and timed swimmers they discovered that the speed was the same as in water - the greater amount of force produced by the push was counterbalanced by the increasing difficulty in advancing.

Now while looking for the answer to 'why does the 'right amount of water to build a sandcastle' have such a large range, scientists have discovered that while the wa­ter’s “stick­i­ness,” or abil­ity to bind sand grains to­geth­er, de­creases as its amount in­creases; in­creas­ing the amount of wa­ter makes up for the de­creas­ing stick­i­ness, as long as more of each sand grain is wet.

http://www.world-science.net/othernews/080212_sand

crazy world.

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