PHY213 Final Summer 2008

PHY213 Final Summer 2008 - Physics 213 Final July 31, 2008...

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Physics 213 Final July 31, 2008 Name:______________________ This is a closed book test. You may use a calculator and a self-made hand-written (no photocopying) crib sheet of dimensions no more than 8-1/2” x 11” with any information on both side. For multiple choice questions, circle the most appropriate answer. For problems, show all your work!!! Partial credit will only be awarded to problems that include the steps used in arriving at the result. Take your time but pace yourself. If you haven’t gotten to the problems by the midpoint of the test, you should consider jumping to them and returning to the multiple choice at the end. If a question is not clear, raise your hand, and I’ll try to clarify the question to you, but don’t expect to get any hints. If you need more paper, I can provide you with some additional blank sheets. Additional suggestions: If you cannot finish a problem write down what you do know and explain in words the necessary steps. You will garner some partial credit for indicating the correct approach. Section Possible Points Points Earned Multiple Choice 60 Problem A 20 Problem B 15 Problem C 15 Problem D 20 Problem E 20 Total: 150 Physical constants Quantity Symbol Value Unit Speed of light in vacuum c , c o 2.998 × 10 8 m/s Permittivity of free space ε o 8.854 × 10 -12 C 2 /Nm 2 Permeability of free space μ o 4 л × 10 -7 Tm/A Coulomb’s constant (1/4 л o ) K 8.988 × 10 9 Nm 2 /C 2 Elementary charge e 1.602 × 10 -19 C Electron mass m e 9.109 × 10 -31 kg Proton mass m p 1.673 × 10 -27 kg Atomic mass unit u 1.661 × 10 -27 kg Avogadro's number N A 6.023 × 10 23 1/mol Planck’s Constant h 6.63 × 10 -34 J·s 1 eV = 1.602 × 10 -19 J, 1 Bq = 1 decay/s = 2.7 x 10 -11 Ci
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Multiple Choice Problems (3 points each) 1. Doug rubs a piece of fur on a hard rubber rod, giving the rod a negative charge. What happens? a. Protons are removed from the rod. b. Electrons are added to the rod. c. The fur is also charged negatively.
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PHY213 Final Summer 2008 - Physics 213 Final July 31, 2008...

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