QUIZ 14

1. A steel cube with 20cm on a side is heated from 10ºC to 75ºC. What is its volume change during the process? The coefficient of volume expansion of steel is 35 x 10^-6 (Cº)^-1.

Solution. We find the volume change from

           DV = bV₀DT = [35 x 10^-6 (Cº)^-1](0.2m)³(75ºC - 10ºC) = 1.8 x 10^-5 m³.

2. What is -129ºF on the Celsius scale?

Solution. The temperature on Celsius scale is

            T = [(-129 - 32) x 5/9]ºC = -89.ºC.