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A brass lidscrews tightly onto a glass jar at 20°C. To help open the jar,it can be placed into a bath of hot water. After this treatment,the temperatures of the lid and the jar are both 56°C. Theinside diameter of the lid is 6.5 cm at 20°C. Find the size of the gap (difference in radius) that develops by this procedure.

_______ cm

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