Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 2.50 kg · m2 about its central axis, is set spinning counterclockwise at 300 rev/min. The second disk, with rotational inertia 5.20 kg · m? about its central axis, is set spinning counterclockwise at 700 rev/min. They then couple together. (a) What is their angular speed after coupling? 570.129870129 y rev/min (b) If instead the second disk is set spinning clockwise at 700 rev/min, what is their angular speed after they couple together? -375.32467532 x rev/min (c) What is their direction of rotation after they couple together? counterclockwise o clockwise

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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.