At a point on the airfoil in subsonic wind tunnel, the air pressure and temperature are 0.4 atm and 5°c, respectively. assuming the flow is isentropic. if the ambient air pressure is 1 atm, calculate the ambient air temperature and density.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

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 the main objective of using reheat rankine cycle?