Consider air in an truck tire maintained at a pressure of 220 kPa (gage). The atmospheric pressure is 94 kPa. The air in the tire is at a temperature of 25 oC. A 4 mm diameter hole develops in the tire wall, due to a puncture. Approximating the flow out of the hole as isentropic, determine the initial mass flow rate of air leaving the tire [kg/sec].

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery

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?