Active waste from a nuclear power plant was stored in glass cylinders with radius R = 0.15m. The heat release per unit length due to fission decay is q = 1kW/m. The thermal conductivity of the glass wall of the cylinder is A = 3W/(m.K). Find the temperature difference (in degrees Kelvin) between the cylinder center and wall.

Active waste from a nuclear power plant was stored in glass cylinders with radius R = 0.15m. The heat release per unit length due to fission decay is q = 1kW/m. The thermal conductivity of the glass wall of the cylinder is A = 3W/(m.K). Find the temperature difference (in degrees Kelvin) between the cylinder center and wall.