exam3_solutions - Physics 198 Exam 3 Fall 2011 Name_...

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Physics 198 Exam 3 Fall 2011 Name_________________ Physics 198 Fall 2011 Exam 3 Thursday, December 1 Directions: This 50-minute exam consists of twenty multiple-choice questions. This test is worth 20% of your final grade. (The lowest score of three midterm exams will be dropped from the total score .) The questions on this test are not in order of difficulty. You must mark all of your answers on both your test and answer sheet. In marking the multiple choice bubble sheet use a number 2 pencil. Do not use ink. If you did not bring a pencil, ask for one. Fill in the appropriate circles completely. If you need to change any entry, you must completely erase your previous entry. Carefully read each question and its five possible answers. Select one and only one answer for each question. Choose the answer that is closest to the correct one. When you are finished with the exam, return the bubble sheet and the exam itself. Good luck! 1
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Physics 198 Exam 3 Fall 2011 41. A string is plucked at its center. Let n be the harmonic number. Which statement about the string is correct? A) It contains only odd harmonics whose amplitudes decries as 1/n. B) It contains only odd harmonics whose amplitudes decries as 2 / 1 n C) It contains only even harmonics whose amplitudes decries as 1/n. D) It contains only even harmonics whose amplitudes decries as 2 / 1 n E) It contains all harmonics whose amplitudes decries as 1/n. 42. A string is plucked at 1/5
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exam3_solutions - Physics 198 Exam 3 Fall 2011 Name_...

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