Water at a mass flow rate of 0.3 kg/s is cooled from 70oC to 30oC by passing it through a thin walled tube of diameter D=.05 m. Also air coolant passes over the outside of the tube in cross flow at T[infinity]=15oC with a velocity of 18 m/s. Assume negligible conduction in the wall and steady state conditions. Assume a film temperature for air of 300K

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

Determine (a) the maximum thermal efficiency of reversible power cycles operating between a hot reservoir at 1000°c and a cold reservoir at 200°c and (b) the maximum cops for reversible refrigeration and heat pump cycies, respectively, between 28°c and 14°c.