http://schoolsolver.com/questions/19-A-vertical-glass-tube-of-length-L=1.280-000-m-is-half-filled-with-a-liquid-at-20.000-000°C-How-much-will-the-height-of-the-liquid-column-change-when-the-tube-and-liquid-are-heated-to-30.000-000°C-Use-coefficients-aglass=1.000-000X10^-5/K-and-bliquid=4.000-000X10^-5/K/