Two otherWise identical, small conducting spheres have charges +9.0 µC and -2.0 µC. When placed a distance r apart, each experiences an attractive force of 7.2 N. The spheres are then touched together and moved back to a distancer apart. Find the magnitude of the new force on each sphere. N

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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.