1. A 4cm thick sheet of plastic (K=5W/MK) is to be bonded to a 10cm thick composite wall made of aluminum (K=200W/MK) and copper (K=250W/MK). The glue that will accomplish the bonding is to be held at 350K to achieve the best adherence, and the heat to accomplish this bonding is to be provided by a radiant heat source. The convective heat transfer coefficient on the outside surfaces of the plastic and aluminum and copper is 10W/MK, and the surrounding air is at 300K. What is the required radiant heat flux at steady state to achieve the bonding if it is applied to the aluminum and copper side? Assume one-dimensional heat transfer. Do not neglect radiant emissions for the aluminum and copper side, but neglect them for the plastic side