What will happem if a student tries to pass a ball trough a ring after it has cooled off from a brunsen burner?

If a student tries to pass a ball through a ring after it has cooled off from a Bunsen burner, the ball will likely fit through the ring easily, assuming the ring has returned to room temperature and is not expanded due to heat. When heated, metals can expand, but once cooled, they contract back to their original size. As a result, if the ring was previously expanded by heat, it would return to its original dimensions, allowing the ball to pass through without any obstruction.