Problem 6: If copper (which has a melting point of 1085°C) homogeneously nucleates at 849 °C, calculate the critical radius given values of -1.77 × 109 J/m2 for the latent heat of fusion and 0.200 J/m2 for the surface free energy. (10 points)

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

Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.

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