Seth wants to build a wall of bricks. Which equipment will help him in the process? OA masonry pump
OB. hacksaw
OC. mortar mixer
OD. pressurized cleaning equipment

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)