An aluminum ring needs to be placed over a cylinder steel bar. At 10.00 degrees C, the inside diameter of the ring is 4.000cm and the outer diameter of the bar is 4.040cm.
A) In order to slip the ring over the bar should the ring be heated or cooled? Explain.
B) Find the temperature of the ring at which it fits over the bar. The bar remains at 10.00 degrees C.