An iron ball has a diameter of 5 cm and its too large to pass through the hole of 0.01 mm in the brass plate when the ball and the plate are at temperature of 30C.At what temperature the same for the ball and plate , will the ball just pass through the hole?
( alpha for iron = 1.2x10-5 and alpha for brass = 1.9x10-5 )
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48 degree celsius
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