What is the rate at which thermal energy will flow by conduction (in BTU/hr) through a 8.45 in thick piece of brass that has a cross-sectional area of 19.5 square feet if the temperature difference from one side of the brass to the other is 36.1 Fahrenheit degrees?

Thermal Conductivity Constants (symbol k) Material BTU . in hr . ft- . FC Air 0.17 Aluminum 1460 Asbestos 4.0 Brass 750 Brick 4.5 Cellulose (blown in) 0.2 Concrete 7.5 Copper 2670 Corkboard 0.30 Fiberglass 0.29 Glass 4.96 Gypsum board 1.17 Hydrogen 1.3 Iron 320 Water 4.15 Wood (Pine across the grain) 0.78