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April 21, 2015

Homework Help: Physics repost please clarify

Posted by Mary on Tuesday, October 16, 2007 at 1:07am.

The distance between earth and the moon can be determined from the time it takes for a laser beam to travel from earth to a reflector on the moon and back. If the round-trip time can be measured to an accuracy of 0.19 of a nanosecond (1 ns = 10-9 s), what is the corresponding error in the earth-moon distance?

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