An effect whereby a mass moving in a rotating system experiences a force (the Coriolis force ) acting perpendicular to the direction of motion and to the axis of rotation. On the earth, the effect tends to deflect moving objects to the right in the northern hemisphere and to the left in the southern and is important in the formation of cyclonic weather systems.

Mullfoto of the Day

I understand that simple instructions might be necessary as to the use of a modern gasoline pump; but, I am worried that the person needing those simple instructions then gets into his or her modern $40,000 automobile that came with an instruction book three inches thick.