What is CORIOLIS FORCES?
Coriolis forces are the effect of the rotation of the Earth. They are exceedingly subtle; they will cause a pendulum to rotate once every 24 hours, for example. They get substantial when you’re dealing with really big things like weather systems: hurricanes turn one direction in the northern hemisphere and the other way in the southern hemisphere, for example. However, unlike common wisdom, Coriolis forces have basically no effect on the draining of a sink or bathtub. While it’s POSSIBLE to experience swirling from Coriolis forces in this scale, it requires unbelievably touchy experiments with perfecty symmetrical sinks with specially designed drains in rooms with ABSOLUTELY NO air circulation, and several weeks for the water to lose all residual angular momentum. Otherwise ambient effects totally drown out the Coriolis force.
