Question: You are given a circular washer with a d 1 of 3 0 0 mm and a d 2 of 6 0 0 mm .

You are given a circular washer with a d1 of 300 mm and a d2 of 600 mm. Its initial temperature is 200 C. You heat the washer up to 1800 C. What is the increase in the diameter of the center hole? \alpha =23.8 x 10-6/0 C

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