19. a. Which kind of ball loses more energy in each bounce? How can you tell? b. Where does the lost energy go? c. What is true about the total amount of energy, in all forms, in the system of the ball and its surroundings? 20. If 100% of the ball's KE were converted back to PE, how high would it bounce?

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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.