A very thick concrete wall (λ = 0.80W/K m, = 1950 kg/m 3 , c = 880 J/kg K) initially has as temperature throughout the wall of ϑ0 = 20 ◦C. It is heated at its surface with a constant heat flux ˙q 0 =...

A very thick concrete wall (λ = 0.80W/K m, = 1950 kg/m³, c = 880 J/kg K) initially has as temperature throughout the wall of ϑ0 = 20 ◦C. It is heated at its surface with a constant heat flux ˙q₀
= 650W/m²
(sunshine). What temperature has the surface reached after 2.0 h? How high is the temperature at this time at a depth of 10 cm?