# physics

A certain spaceship has a speed of 18200 mi/hr. What is its speed in light-years/century? A light-year is the distance that light travels in one year with a speed of 186,000 mi/s.

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1. Divide 18,200 mi/hr by the number of miles in a lightyear. That will give you light years/hr. Then multiply the result by the number of hours in a century,
24*365.25*100.

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