Calculate the equilibrium number of vacancies in the cubic meter of Ag at 700 ̊C. The vacancy formation energy is 1.1 eV/atom and there are 5.78 x 1028 atomic sites in 1 m3 of Ag.

 A 600 mm long sample with a square cross-section (side length 5 mm) is stretched until the side length is decreased by 0.002 mm. What is the applied force?  E=80GPa and v=0.33. Assume the deformation is elastic.

Calculate the number of Frenkel defects per cubic meter in zinc oxide at 727˚C. The energy for defect formation is 2.51 eV, while the density for ZnO is 5.55 g/cm3 at this temperature. 

Calculate the diffusion coefficient (in m2/s) for copper in aluminum at 300 oC.

Which of the following statement(s) below is false? Select all that apply.

A molten polymer is quenched (rapidly cooled), arresting the structure of the liquid in the solid polymer state. True or false: This method of processing (quenching) is a good way to make a gas barrier film.

Calculate the equilibrium number of vacancies in the cubic meter of Cu at 1200 ̊C. The vacancy formation energy is 0.9 eV/atom and there are 8 x 1028 atomic sites in 1 m3 of Cu.

A three-point bending test is performed on a cylindrical specimen (radius = 9.1 mm); the distance between support points is 45 mm. Compute the flexural strength if the load at fracture is 5560 N.

 A 300 mm long sample with a square cross-section (side length 10 mm) is stretched until the side length is decreased by 0.002 mm. What is the applied force?  E=80GPa and v=0.33. Assume the deformation is elastic.

Which of these is considered a planar defect?