Question: Following a collision in outer space, a copper disk at 8 5 0 C is rotating about its axis with an angular speed of 2

Following a collision in outer space, a copper disk at 850C is rotating about its axis with an angular speed of 25rads. As the disk radiates infrared light, its temperature falls to 20C. No external torque acts on the disk. What is its angular speed at the lower temperature?
Following a collision in outer space, a copper

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