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

2 answers

D = (3 * 10^8 * 10^-3)km/s * 3690s/hr
* 1.7hrs = 18360 * 10^5km = 1.836 * 10^9km.
Correction: Change 3690s/hr to 3600s/hr.
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