Two Particles On A Collision Course
A and B are two points on a straight line. How far apart they are, depends of how this question requires them to be.
Two particles C and D starting from points A and B respectively are on collision course. The velocity of each of the particles is the same. It is 75% the speed of light.
What is the relative velocity of one particle with respect to the other?
Incidentally the speed of light is 186284 miles per second.
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