Water flowing in a horizontal 25-cm-diameter pipe at 9 m/s and 300 kpa gage enters a 90° bend reducing section, which connects to a 15-cm-diameter vertical pipe. the inlet of the bend is 50 cm above the exit. neglecting any frictional and gravitational effects, determine the net resultant force exerted on the reducer by the water. take the momentum-flux correction factor to be 1.04.

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?