The force between two charges separated by a distance d is F. If the charges are pulled apart to a distance 4d, the force of interaction between two charges becomes a. 4F b. F/4 c. F/12 d. F/16

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.