At a temperature of 20 degrees Celsius, you use a steel ruler to measure the length of a brass rod and find it to be 20.00 cm. What would you measure the length of the brass rod to be using the same ruler if both the rod and the ruler are at a temperature of 270 degrees Celsius? The coefficients of linear expansion for brass and steel are b = 2.0 x 10-5 K-1 and s = 1.2 x 10-5 K-1, respectively. 20.10 cm 20.02 cm 19.96 cm 20.04 cm 20.06 cm