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Unformatted text preview: Physics 121 Final Exam 1 Form 0 Phy 121 Final Exam Fall 2010 EXAM FORM 0 This is a closed book exam. Use your own formula sheets 3 pages, 8 x 11 inches, double sided. ANY manipulation of electronic equipment (IPod, cell phone, laptop computer, etc.) other than your calculator is strictly prohibited, and will result in a zero on this exam. Answer all problems on the bubble scan sheet. Before you start, enter your name and student ID number on the answer sheet. Shade in the circles so that the computer can read your name and ID number. This is exam form 0. Mark 0 on the first digit of birth day on the bubble scan sheet. (Do not fill in your birth date.) You should be able to do some of the problems fairly quickly, and others will take some time and thought. Pace yourself, and dont get stuck on the hard ones. G = 6.67 1011 N m 2 kg2 Atmospheric pressure = 1.013 10 5 Pa 273 K = 0 C R = 8.31 J/(mol K) Ice has a specific heat of 2090 J / (kg K) and a latent heat of melting of 3.33 10 5 J / kg Liquid water has a specific heat of 4187 J / (kg K), a latent heat of vaporization of 2.26 10 6 J / kg, and a density of 1000 kg/m 3 = 1 kg/liter. Steel has a specific heat of 450 J / (kg K), thermal expansion = 1.2 105 / K, and a thermal conductivity of 14 W / (m K) u = 1.66 1027 kg N A = 6.02 10 23 k B = 1.38 1023 J/K Speed of sound in air = 343 m/s 1. In the figure below, the 35 kg object moves to the right at 50 m/s and the 55 kg object is at rest. The objects undergo a central elastic collision (the velocities of the two objects after the collision are aligned with the incident velocity). The velocity of the incident object after the collision is (including its sign, to the right is positive) A. 11 m / s to the left B. 39 m / s to the left C. 0 m / s D. 39 m / s to the right E. 25 m / s to the left Physics 121 Final Exam 2 Form 0 2. Which of the following statements is TRUE about sound waves? A. Sound can travel through a vacuum. B. A sound wave is a pressure wave; it can be thought of as fluctuations in pressure with respect to time. C. A sound wave is a transverse wave. D. To hear the sound of a tuning fork, the tines of the fork must move air from the fork to one's ear....
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 Fall '08
 STEPHENS

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