Posted by **glenn** on Sunday, May 22, 2011 at 1:53am.

A person standing on Earth at 44 degrees 9 minutes North, how fast is he rotating around the Earth in mph?

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**drwls**, Sunday, May 22, 2011 at 4:52am
(2*pi*R cos 44.15)/24 ,

where R is the radius of the earth, in miles.

It's about 750 mph. That is, coincidentally, very close to the speed of sound in warm air.

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