Posted by **Alex** on Wednesday, September 8, 2010 at 7:48pm.

Use the fact that the speed of light in a vacuum is about 3.00 x 10^8 m/s to determine how many kilometers a pulse from a laser beam travels in exactly 1.7 hour(s).

i converted 1.7 hours to secs but im stuck there and i don't know what to do for the rest of the problem

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