Atornado may be simulated as a two-part circulating flow in cylindrical coordinates, with vr = vz = 0. vtheta = ωr if r ≤ r and vtheta = ωr2 / r if r ≥ r. determine the vorticity and the strain rates in each part of the flow.

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?