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From: halle@hou2b.UUCP (J.HALLE)
Newsgroups: net.physics
Subject: Re: The wild ride down the drain... (Coriolis force)
Message-ID: <677@hou2b.UUCP>
Date: Fri, 20-Dec-85 14:40:33 EST
Article-I.D.: hou2b.677
Posted: Fri Dec 20 14:40:33 1985
Date-Received: Sat, 21-Dec-85 05:25:58 EST
References: <50@decwrl.UUCP>
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 8

Contrary to what many have claimed, the coriolis force does exert
a real influence in determining the direction of spiral down the
drain.  This fact has been experimentally shown many times.  There
is a short film I saw in Fluids class or Frosh Physics umpteen years
ago that recorded one of these experiments.  A large tub was filled
so that the induced motion would be contrary to the expected motion.
The tub sat undisturbed for hours.  When a plug was pulled, the water
eventually spiraled the way expected.  The experiment was repeatable.