Quiz 1 2006

# Quiz 1 2006 - MAT33 Engineering Materials and Processes...

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MAT33 Engineering Materials and Processes Fall 2006 First Quiz Monday 2 nd October 2006, 11.10-12.00 NAME ……………………………………………………. . Section Professor Pearson Th 12.10pm .……. Q1………. . Professor Marder Th 1.10pm ……. . Q2………. . Professor Soukhojak Fr 8.10am ..…… Q3………. . Professor Soukhojak Fr 9.10am ……. . Q4………. . Professor Rickman Fr 10.10am ……. . Q5………. . Total………. ..% Closed book exam. Please write your final answers in the blanks provided, where appropriate. Partial credit for questions will only be considered if your workings are shown. Calculator policy: I have cleared my calculator’s memory prior to taking this exam. Signature ________________ Useful equations ρ = nA V c N A N v = N exp - Q v kT C 1 ' = C 1 A 2 C 1 A 2 + C 2 A 1 x 100 n w = M w m N d r = ( 29 ( 29 100 % a c s a s c C - - = ( 29 ( 29 { } [ ] 100 25 . 0 exp 1 % 2 x I B A χ - - - = Useful constants Avagadro’s number, N A 6.023 x 10 23 atoms/mol Boltzmann’s constant, k 8.62 x 10 -5 eV/atom-K 1.38 x 10 -23 J/atom-K Gas constant, R 8.31 J/mol-K 1

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Bonding [13 points] 1a.) Potential energy (E) versus separation distance (r) curves describing the bonding of three different materials are shown below. Use them to answer the following questions. (i.) Which material should have the highest melting point? (ii)
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## Quiz 1 2006 - MAT33 Engineering Materials and Processes...

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