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<node id="206752" title="OT: Re: Re: The parable of the falling droplet" created="2002-10-20 21:56:46" updated="2005-03-26 13:47:16">
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<author id="77866">
thraxil</author>
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&lt;blockquote&gt;&lt;i&gt;If our brave raindrop was an Australian (or any other southern hemisphere) raindrop, does it still hold true. I seem to remember that their water flows the opposite way to ours...&lt;/i&gt;&lt;/blockquote&gt;

&lt;p&gt;if you're referring to the Coriolis effect -- and it sounds  like you are -- the physicist in me feels the need to clear some things up.&lt;/p&gt;

&lt;p&gt;you often hear people claiming that bathtubs in the northern hemisphere drain clockwise while bathtups in the southern hemisphere drain counter-clockwise because of the Coriolis effect.&lt;/p&gt;

&lt;p&gt;the truth is that while the coriolis effect does exist and can have a significant impact on things like meteorology, its magnitude is far too small to have any practical effect over an area as small as a bathtub. the direction that the water spins as it drains is going to be dominated by the shape of the tub and any residual currents in the water. as a homework assignment for a physics class, i remember having to calculate the maximum residual current that the coriolis effect could overcome for a perfectly smooth, symetric, round bathtub. it was somewhere on the order of one rotation per year.&lt;/p&gt;

&lt;p&gt;but of course, everyone knows that the earth is really flat and on the back of a giant turtle, so the whole thing must just be a myth anyway. &amp;lt;grin /&amp;gt;&lt;/p&gt;

&lt;p align="right"&gt;&lt;a href="http://www.columbia.edu/~anders/"&gt;anders pearson&lt;/a&gt;&lt;/p&gt;
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206732</field>
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206747</field>
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