How much heat conducts through a brick wall which is 12.0 cm thick and 20.0 square meters in area in one month if the interior temperature is maintained at 15.0 C and the exterior temperature is 0.0 C? (Brick has a thermal conductivity coefficient of 0.60 J/sm K). Convert this amount of heat into BTU/hour and also into kW-hr and calculate the cost of this energy if it is supplied electrically (assume $0.13 per kW-hr). Now redo this calculation with the assumption that the air both inside and outside the brick wall has a static boundary layer such that the temperature difference across the brick is only 5.0C