In article . com,
"bpnjensen" wrote:

Oh yeah. At the equator no twist, the force is zero.


This is true, but again, only on large scale circulation - not on sinks
and toilets.

The scale does is not a factor of the Coriolis force. The magnitude of
the force is constrained by latitude and speed of matter. It is a force
stemming from the inertia of mass having a rotational spin placed on it
by the motion of the earth so it affects all matter even the water in
your sink.

If you don't believe me then you can do this experiment yourself. Fill a
sink with water and after it is very still open the drain without
disturbing which way the water spins down the drain. Do it a couple of
times and you will notice a tendency for the water to spin clockwise.

--
Telamon
Ventura, California