copper, metals...
Usually, yes.
Many materials conduct heat reasonably well, but are fairly good insulators where electricity is concerned. One example would be glass.
Metals have de-localized electrons - electron clouds that do not "belong" to any one atom. When you try to feed electrons in one end of a metal rod, if the rod has a place on the other end where...
Yes,it is the plastics,wood.our clothes that donot conduct heat or electricity