It is desired to just able to slip the 16.0 mm diameter glass marble through an aluminum washer. At 20.0 , the inner diameter of the washer is 15.98 mm. To what temperature should the aluminum washer be heated for the marble just able to slip through. The marble remains at 20.0. (aluminum)= 2.3 10 ^-1; (glass)= 2.7 10 ^-1.