a large furnace is in the shape of a cone as shown below (not drawn to scale). the bottom circular region of the furnace measures 2 meters in diameter. the top circular region of the furnace measures 1.0 meter in diameter. the furnace measures 3.5 meters tall. the side surface is 650 k, the top is at 300 k, and the bottom is at 750 k. what is the net heat transfer rate from the side?