Point charges q, = 52 µC and q2 = -22 uC are placed 2.0 m apart, with q2 on the right. What is the force (in N) on a third charge 43 = 19 uC placed midway between q, and q2? (Assume the positive direction is to the right. Indicate the direction with the sign of your answer.)

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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.