When launching a satellite into space, the energy required is when using an assumption for constant gravity vs. the universal law of gravity a) underestimated b) exactly the same c) overestimated The gravitational potential energy of a two-object system a) Increases as the objects move closer together b) Does not depend on the distance between objects c) Decreases in magnitude if the objects become more massive d) Can be positive or negative e) None of the above

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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.