Aspherical pressure tank is made of 1050 cold-drawn steel (sy = 84 ksi, su = 100 ksi). the tank has a 40'' inner diameter, has a 1/2'' wall thickness, and is pressurized cyclically between 200 psi and 1000 psi.
1. using the goodman fatigue criterion for infinite life, find the overall safety factor against fatigue failure.

Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k

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?

What is a monomer? how do they form a ploymer from the view point of chemical bonding?