Which of the following is an example of a technology push product? O a touch screen for a computer tablet O a built-in GPS (global positioning system) in a car O a portable music and movie player O a talking text app for a cell phone.​

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)