A brass lid screws 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 58 C. The inside diameter of the lid is 6.0 cm at 20 C. Part A Find the size of the gap (difference in radius) that develops by this procedure. Express your answer to two significant figures and include the appropriate units. ? Ar = Value Units An aluminum sphere is 8.20 cm in diameter. Part A What will be its % change in volume if it is heated from 30C to 120 C? Express your answer to two significant figures and include the appropriate units. AV Submit Request Answer ? keyboard shortcuts %