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October 21, 2014

Homework Help: physics

Posted by rick on Monday, April 14, 2008 at 9:13pm.

A law enforcement officer in an intergalactic "police car" turns on a red flashing light and sees it generate a flash every 1.5 s. A person on earth measures that the time between flashes is 2.9 s. How fast is the "police car" moving relative to the earth?

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