Atrapezoidal channel with a bottom width of 5 m and side slopes t = 2 runs on a slope of 0.0005 and carries a discharge of 50 m3/s at normal depth. take manning’s n as 0.021 (metric). a) what is the specific energy of the flow in the channel? b) is the flow subcritical or supercritical? c) what is the alternate depth to the normal depth? d) what is the critical depth in the channel?

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?