l. A 2.00cmdiameter steel cylinder fits into a hole in a steel block. At 250C, there is a uniform 0.0525mm gap between the cylinder and the block. At what temperature rwill the gap between the cylinder and the bloclt disappear if only the cylinder is being heated. Take the coefcient of thermal linear expansion ofsteel to be t l a H1 " Iv.\" Hint: For small changes AH in the radius of a circle. its area A :Ht changes by an amount 3.! - 3:7;de- Answer: 508 3C