A0.083-in-diameter electrical wire at 90°f is covered by 0.02-in-thick plastic insulation (k = 0.075 btu/h·ft·°f). the wire is exposed to a medium at 50°f, with a combined convection and radiation heat transfer coefficient of 2.5 btu/h·ft2·°f. assume a thermal contact resistance of 0.001 h·ft2·°f/btu at the interface of the wire and the insulation. determine the total thermal resistance of the electrical wire without insulation. (you must provide an answer before moving on to the next part.) the total thermal resistance of the electrical wire without insulation is 18.41 18.41 correct h·°f/btu