30 July 2014

Question

Group's answer

My answer

a ) To heat the ring .

b ) The ring need to become bigger in order for the ball to pass through , so we heat the ring thus the molecules in the ring overcome the attractive forces between them , causing the increase in distance between the molecules . As the inner circle of the ring cannot provide enough space for the molecules to spread out , the ring will only expand outwards to gain more space to move freely .