A 1-mm-tnick copper plate (k = 386 W/m · °C) is sandwiched between two 5-mm-thick epoxy bo...

A 1-mm-tnick copper plate (k = 386 W/m · °C) is sandwiched between two 5-mm-thick epoxy boards (k = 0.26 W/m · °C) that are 15 cm × 20 cm in size. If the thermal contact conductance on both sides of the copper plate is estimated to be 6000 W/m · °C, determine the error involved in the total thermal resistance of the plate if the thermal contact conductances are ignored.