What are some factors that could account for the percent difference between the experimental and accepted values for the electrical equivalent of heat? note: equipment error is not an option. think more about temperature changes and heat transfer, conservation of thermal energy and operator error / miscalculations.

Describe one experiment in which the glass transition temperature and melting temperature of a totally amorphous thermoplastic material can be determined. show the relevant experimental results in a diagram which should be properly annotated with the two temperatures clearly marked. what is likely to happen to the curve in the diagram if the amorphous polymer is replaced by a thermosetting type?