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A record player disk base with a mass of 420 g rotates freely at an angular speed of 33 1/3 rpm. A 25 g mouse is initially riding on the rim of the disk, 15 cm from the center. If the mouse walks to the center of the disk, will the disk rotate faster, slower, or at the same rate? Explain. Calculate the angular speed of the disk when the mouse reaches the center.

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