f. Amorphous polymers have higher densities than crystalline polymers. g. Carbon atoms on polymer chains cannot rotate around their chain bonds. h. A steel ruler calibrated to give a correct length at 25 oC will give too short of a reading at a higher temperature. i. A carbon-carbon bond, C-C, will have 0% ionic character. j. Diffusion in a material before steady state is reached depends on both time and position