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April 21, 2014

April 21, 2014

Posted by **danielle** on Friday, September 12, 2008 at 2:12pm.

- astronomy -
**bobpursley**, Friday, September 12, 2008 at 2:20pmIf you know the radius of rotation, which is given, then you know the distance (2PIr) Earth travels in a year.

So figure out what fraction a day, hour, a second is.

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