A certain material has a thickness of 4 cm and its thermal conductivity is 0.04 W / m.oC. At a certain time the temperature distribution with respect to x, i.e. the distance from the left face is T =...

A certain material has a thickness of 4 cm and its thermal conductivity is 0.04 W / m.oC. At a certain time the temperature distribution with respect to x, i.e. the distance from the left face is T = 150 x2 - 30 x, where x is in meters. Calculate the heat flow rate at x = 0 and x = 30 cm!