Calculate the energy in ev/atom) for vacancy formation in some metal, m, given that the equilibrium number of vacancies at 559°c is 6.16 x 1023 m^3. the density and atomic weight (at 559°c) for this metal are 9.70 g/cm^3 and 122.5 g/mol, respectively.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false