A 0 03 in thick copper plate (k 223 Btu h middot ft middot deg F) is sandwiched between two 0 15 in thick epoxy boards (k 0 15 Btu h middot ft middot deg F) that are 7 in Atilde 9 in in size Determine the effective thermal conductivity of the board along its 9 in long side What fraction of the heat...

A thin copper plate is sandwiched between two layers of epoxy boards The effective thermal conductiv ...

A 0.03-in-thick copper plate (k = 223 Btu/h·ft·°F) is sandwiched between two 0.15-in-thick epoxy boards (k =

Question:

A 0.03-in-thick copper plate (k = 223 Btu/h·ft·°F) is sandwiched between two 0.15-in-thick epoxy boards (k = 0.15 Btu/h·ft·°F) that are 7 in Ã— 9 in in size. Determine the effective thermal conductivity of the board along its 9-in-long side. What fraction of the heat conducted along that side is conducted through copper?

9 in Ероху boards Copper plate 7 in + 0.03 In