(Solved): 1) State 4 types of crystal defects in solids (ex vacancy) and explain each defect with it's effect ...

1) State 4 types of crystal defects in solids (ex vacancy) and explain each defect with it's effect on materials property. (ex: defect type: Vacancy/it effect on the properties: decrease electron mobility) 2) Based on the stress-strain curve above, a) determine the yield strength (in MPa)? b) What is the tensile strength (in MPa)? C) At what elongation, does the necking start? 3) Find the young's modulus of the stress-strain curve above. a) Determine percent c) elongation at fracture. d) Define the elongation range where covers the elastic deformation. 4) Suggest an instrument to characterize morphology of a material sample at 1 micron magnification. 5) Define doping techniques used in materials? Give an example of doping in materials and used in every day applications 6) Oxygen is passing through a pipe with dimensions: $20\mathrm{cm}$ radius and $10\mathrm{m}$ length. The inlet concentration of ${\mathrm{O}}_2$ is $30\mathrm{kg}/{\mathrm{m}}^3$ and outlet concentration is $10\mathrm{kg}/{\mathrm{m}}^3$. Diffusion coefficient of ${\mathrm{O}}_2$ is $1.8\times 10-5{\mathrm{m}}^2/\mathrm{s}$. a) Calculate the diffusion rate. B) What would you do to increase the diffusion of ${\mathrm{O}}_2$ through the pipe.