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A curling stone slides on ice with a speed of 2.0 m/s and collides inelastically with an identical,stationary curling stone. After the collision, the first stone is deflected by a counterclockwise angle of 28degrees from its original direction of travel, and the second stone moves in a direction that makes a 42degrees clockwise angle with the original direction of travel of the first stone. What fraction of the initial energy is lost in this collision?

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