Compare the equilibrium number of vacancies in gold (au) at 300 c and 900°c. given that the energy for vacancy formation is 1.6 ev/atom at room temperature and 1.0 ev/atom at 900c respectively. the atomic weight and density of au are 196.9 gmol and 18.63 g/cm3, respectively. analyze the effect of temperature on the equilibrium number of vacancies.

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.

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.

Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.