Rita is trying to decide which branch of engineering she wants to study in college. Which branch of engineering best fits Rita's interests?

-chemical engineering
-biomedical engineering
-electrical engineering
-mechanical engineering

On solidification from a melt, the polymer polyethylene forms a semi-crystalline spherulite structure. (i) sketch an individual spherulite and label the amorphous and crystalline regions. (ii) draw a schematic to show the changes in specific volume with temperature during cooling from the melt, comparing it to the theoretical extremes of fully crystalline and fully amorphous (indicate tm and tg)