MATLS 1M03 - WebCT - Assignment 2 - Try 1

MATLS 1M03 - WebCT - Assignment 2 - Try 1 - WebCT Quiz...

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WebCT Quiz Homepage http://webct.mcmaster.ca/SCRIPT/MATLS_1M03_T2_07/scripts/student. .. 1 of 4 2/5/2007 3:05 PM View Results Name: AARON MURENBEELD Attempt: 1 / 3 Out of: 16 Started: January 19, 2007 3:10am Finished: February 3, 2007 11:40pm Time spent: 380 hr, 29 min., 32 sec. Question 1 (1 point) True or False: A metal is more likely to dissolve in a host metal that has a lower valency. Student response: Correct Response Student Response Answer Choices a. True b. False General feedback: Other factors being equal, a metal will have more of a tendency to dissolve another metal of higher valency than one of a lower valency. ~ from page 69 of the text. Score: 0 / 1 Question 2 (1 point) What is the maximum purity (in at%) that can be practically achieved in metals? Student response: Correct Response Student Response Answer Choices a. 72% b. 88% c. 97% d. 99.1% e. 99.9999% General feedback: See page 68 of the text book for more details. Score: 1 / 1 Question 3 (1 point) The number of vacancies in some hypothetical metal increases by a factor of 4 when the temperature is increased from 803 K to 1125 K. Calculate the energy for vacancy formation (in eV/atom) assuming that the density of the metal remains the same over this temperature range. Use decimal notation, digits after decimal: 3 Student response: Not answered Correct answer: 0.335 eV/atom General feedback: For more information, see the section on Vacancies and Self-Interstitials in the text. Score: 0 / 1 ( Question not answered. ) Question 4 (1 point) Find the composition in atom percent (at%) of the copper in an aluminum-copper alloy that consists of 44.09 wt% aluminum. Use decimal notation, digits after decimal: 2 Student response: Not answered
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WebCT Quiz Homepage http://webct.mcmaster.ca/SCRIPT/MATLS_1M03_T2_07/scripts/student. ..
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This note was uploaded on 02/08/2010 for the course MATLS 1M03 taught by Professor Okon during the Winter '09 term at McMaster University.

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MATLS 1M03 - WebCT - Assignment 2 - Try 1 - WebCT Quiz...

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