cosinus

To understand truly the Coriolis effect and its wide variety of appearances including influences on winds and toilet flush rotation, I recommend that you refer to this article : http://www.adilca.com/coriolis-force.pdf

I found an interesting article about Coriolis effect : http://www.adilca.com/coriolis-force.pdf "to make the Coriolis effect appear significantly the sink should be covering several square kilometres" ! So the effect of Coriolis force in an ordinary-sized sink is completely negligible !