A 1mm thick copper plate (k = 386 W/mK) is sandwhiched between two 5mm thick epoxy boards (k = 0.26 W/mK) that are 15cm x 20cm in size. If the thermal contact conductance on both sides of the copper plate is estimated to be 6000 W/mK, determine the error involved in the total thermal resistance of the plate if the thermal contact conductance are ignored. I.E. what effect does the thermal contact conductance have on the heat transfer rate.
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