A 2 m long rectangular duct with a cross section 80 mm x 125 mm, is maintained at a constant surface temperature of 425 K. Air, at 1 atm and 310 K, flows into the duct with a mass flow rate of 0.08 kg/s. Calculate the heat transfer rate to the air from the duct and the air outlet temperature. Estimate Tm

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid

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?