exam4solutions(1)

exam4solutions(1) - PHYSICS-2101 Spring Semester 2011...

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1 PHYSICS-2101 Spring Semester 2011 Instructor and section (circle yours) Examination 4 5 April 2011 Chastain (1) Chastain (6) Rupnik (3) Rupnik (4) Rupnik (5) Giammanco (2) Jin (7) Plummer (9) Name (print)___________ KEY ________________ LSU ID _________________________ Signature _______________________________________ TURN OFF AND PUT AWAY ALL CELL PHONES, PAGERS, iPods, MP3s, OR ANY OTHER COMMUNICATIONS, AUDIO, OR VIDEO DEVICES Have your LSU ID ready when you turn in your paper. You may not use cell phone or smart phone application as your calculator. You may use an ordinary scientific or even graphing type calculator, as long as it is not of the "full keyboard" sort. Examine your paper to be sure it is complete and legible. There should be 4 problems and 3 questions, totaling 100 points. Examine your formula sheet as well. It should include 4 pages. For the multiple choice questions , clearly indicate your selected answer(s) for each of the part(s) of the question, circle the correct answer! There is room on the paper for scratch work or calculations, but that work will not be checked or graded. There is no partial credit awarded for multiple choice questions. For the problems, show your work in the space provided. Even a correct answer, without supporting work, will receive little or no credit. Partial credit may be awarded for problems if warranted. Be sure that numerical answers appear with appropriate SI units . Points will be deducted for missing, incorrect, or "silly" units. If the final answer is, in fact, a dimensionless quantity, please write the numerical result followed by the word ” dimensionless .” If you need more room for your problem solution you may write on the back of the page, but be sure to add a note to look on the back. Otherwise anything on the back of the paper will be regarded as scratch work and will not be checked or graded. You will have 60 minutes to complete this examination. Solutions will be posted to the course web page within a few days.
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2 Question #1 ( 12 points ): A cubical block of some material with a side of length L and a density of ρ is placed in a container that is filled with water ( ρ W ) and oil ( ρ O ). The depth of the oil and of the water is larger than the height of the block L. The block is allowed to gradually come to its equilibrium position.
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