PHY108_T2_2010_answers

PHY108_T2_2010_answers - PHY108 Fall 2010 EXAM 2 October...

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1 PHY108 Fall 2010 EXAM 2 October 23, 9:00 – 11:00 a.m. Circle your instructor’s name : Prof. Ia Iashvili ( T,Th 12:30-1:45 pm) Prof. Athos Petrou ( M,W,F 2:00-2:50 pm) PRINT YOUR NAME LAST NAME FIRST NAME SIGN YOUR NAME STUDENT ID NUMBER Useful Constants o = 8.85 10 -12 C 2 /N.m 2 k = 8.99 10 9 kg.m 3 .s -2 .C -2 e = 1.60 10 -19 C m p = 1.67 10 -27 kg m n = 1.67 10 -27 kg m e = 9.11 10 -31 kg N A = 6.02 10 23 atoms/mol INSTRUCTIONS This is a closed book exam except that you are allowed one 8.5”x11” sheet with whatever you wish to write on it. There are 4 problems – you must attempt them all. Allow approximately 20 minutes for each problem. You must show ALL your work to receive full credit. Numerical answers must have SI units and the appropriate number of significant figures. Use the back of the problem page if you need more space and mark OVER on the front side to indicate that there is material at the back side. Enter your answers in the box at the bottom of each page. PROBLEM NUMBER MAXIMUM SCORE YOUR SCORE GRADER 1 25 2 25 3 25 4 25 TOTAL 100
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2 P1. Consider the square shown in the figure that has side length a =14.0 cm. A charge 1 2.00 C q is placed at point (0 cm, 0 cm). A charge 2 3.00 C q 
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PHY108_T2_2010_answers - PHY108 Fall 2010 EXAM 2 October...

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