In order to enhance net radiation exchange between a high temperature surface and a low temperature surface in an enclosure, one should:. (A) polish both surfaces so that they are highly reflective
(B) paint both surfaces so that they are close to a blackbody surface

Plot schematically the tensile stress versus strain curves for a typical thermoplastic material at a temperature below its glass transition temperature (tg and at a temperature above its tg, respectively. do the same for a typical thermosetting material. list in a table any differences or similarities between the two materials at t> tg and t < tg, respectively, and relate them to the structures of the two types of polymers