MTL 200 Final Exam Questions and Answers 2023 Graded A+ BCC Structure. atoms?Formula? Answer - 2 atoms 4R=√3 a FCC Structure. atoms?Formula? Answer - 4 atoms 4R=√2 a Atomic Packing Factor (APF) Answer - (volume of atoms in unit cell)/(volume of unit cell) Density Formula Answer - =(n)(A)/(Vc)(Na) Density of Materials in order Answer - metal>ceramics>polymers Meaning of paranthesis;
- ),< >, { }, [ ] Answer - (planes),
, {family of planes}, [directions] - / 1
Bragg's Equation Answer - nλ=2 d sinθ If diffraction angle is given what must happen to it to use in formula. Answer - divide diffraction angle by two to use in formula.interplanar spacing equation Answer - Conditions for Diffraction in; FCC?BCC? Answer - FCC= h,k and l must all be odd or even BCC=h,k and l must add up to an even number Define Vacancy Diffusion Answer - atoms exchange with vacant spots Define Interstitial Diffusion Answer - smaller atoms squeeze in between big atoms Factors affecting diffusion Answer - Temperature and diffusion coefficient Type of diffusion Time, Concentration Crystal Structure Differences between Steady State vs Unsteady State Diffusion Answer - What is;