At steady state, air at 200 kpa, 52oc and a
massflow rate of 0.5kg/s enters an insulated duct having
differinginlet and exit cross-sectional areas. at the duct exit,
thepressure of the air is 100kpa, the velocity is 255m/s, and
thecross-sectional area is 2 x 10-3 m2.
assumingthe ideal gas model, determine
a) the temperature of the air at the exit,
inoc.
b) the velocity of the air at the inlet, in m/s
c) the inlet cross-sectional area, in m2.

In a unit cell of fcc structure, indicate the position of one of the tetrahedral interstitial sites by plotting the corresponding tetrahedron. do the same for one of the octahedral interstitial sites (in a separate fcc unit cell). mark the positions of all the tetrahedral and octahedral interstitial sites in the unit cells. how many equivalent tetrahedral sites and how many equivalent octahedral sites are contained in a fcc unit cell, respectively. what is the coordination number for a tetrahedral site and what is the coordination number for an octahedral site?