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When you apply the brakes on your car, the kinetic energy of your vehicle is transformed into thermal energy in your brake disks. During a

When you apply the brakes on your car, the kinetic energy of your vehicle is transformed into thermal energy in your brake disks. During a mountain descent, a 28.00-cm-diameter iron brake disk heats up from 20oC to 170oC.
What is the diameter of the disk after it heats up?

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