Fall 2003 Exam1 - MIDTERM I Physics 108 Fall 2003 Friday...

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Page 1 MIDTERM I Physics 108 Fall 2003 Friday, September 19, 2003 6:00 – 8:00 p.m. Print your FIRST name:_______________________________________ Print your LAST name: _______________________________________ Sign your name:_____________________________________________ Person number:______________________________________________ Circle your lecture Instructor Cerne T,Th 12:20-1:45 pm Petrou M,W,F 2:00-2:50 pm Instructions This is a closed book exam There are four problems Allow approximately 30 minutes per problem. . You must show ALL work to receive full credit. Numerical answers must have the right units, and if vectors proper directions Use the back of the problem page if you need more space and mark OVER on the front of the page so that your work will be counted. Place your answers in the answer boxes at the bottom of each problem page. Useful Constants ε o = 8.85 × 10 -12 C 2 /N.m 2 k = 8.99 × 10 9 kg.m 3 .s -2 .C -2 e = 1.6 × 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 Please do not write below this line PROBLEM NUMBER MAXIMUM SCORE YOUR SCORE GRADER 1 25 2 25 3 25 4 25 TOTAL 100
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Page 2 Problem 1 Print Your Name: _________________________________ Imagine that a charge of –Q (consisting of electrons) is placed on the space shuttle, while a charge of -Q (consisting also of electrons) is placed at the center of the earth, as shown in the figure below. The mass of the space shuttle is 2.05x10 6 kg. The radius of the earth is 6.37x10 6 m. Recall that the acceleration due to gravity at the earth’s surface is g=9.81 m/s 2 . a. (10) What charge Q is required to just start lifting the shuttle off the launch pad?
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This test prep was uploaded on 04/14/2008 for the course PHYSICS 108 taught by Professor Halstead during the Spring '08 term at SUNY Buffalo.

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Fall 2003 Exam1 - MIDTERM I Physics 108 Fall 2003 Friday...

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