Create a conditional expression that evaluates to string "negative" if user_val is less than 0, and "non-negative" otherwise. Sample output with input: -9 -9 is negative

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?