Hot water at 90C flows at a velocity of 0.25m/s through a horizontal pipe (Inside diameter 10 , thickness 5mm Thermal conductivity k=45w/mk ). The pipe is covered with a 9cm layer of insulation having k=0.5W/mk, followed by 4cm layer of insulation having k=0.25W/mk. The outside surface of the insulation is exposed to ambient air at 25C. a) Sketch the electric network analog for the one dimensional heat flow b) Estimate the individual resistances and overall resistances in the network c) Estimate the rate of heat transfer d) Estimate the exit temperature of the water per unit length