The frame is used to support a load of sand that weighs 70 lb. the sand hangs from a cable that passes around a frictionless pulley (radius = 0.5 ft) at d and is anchored to the wall. the structure is rigidly attached to the wall at c, and pinned connections exist at joints a, b, d, and e. determine the forces at a and the force(s) in link be.

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?

Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.

Major ingredients of traditional ceramics (a) silica (b) clay (c) feldspar (d) all