Physics 207 Exam 3 Sloution

Physics 207 Exam 3 Sloution - Physics 207 Exam 3 Nov 18,...

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Physics 207 Exam 3 Nov 18, 2005 Name: Key Section: TA: Annie, Christie, Fan, Larry, Laura, Patrick, Instructions: 1. Don’t forget to write down your name and section number. 2. Only one answer is allowed for each multiple-choice question. 3. Except for the multiple-choice problems, a reasonable amount of work is required to receive full credit. 4. Be aware that intermediate steps earn points even if the final answer is incorrect. 5. Erase (or cross out) any mistakes or you will be marked down. Grading is based on everything you have written down.
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Problem 1: multiple-choice questions (30 points, 3 points each): Please circle the correct answer for each question below. Only one correct answer per question is expected. Answer with more than one choice earns zero credit. (1) A wave described by y=2.0cos(6.0x +3.0t + 0.23 π ) has a wave speed of : (a) 3.0 m/s to the right (b) 3.0 m/s to the left (c) 0.5 m/s to the left (d) dy/dt = -6.0sin(6.0x +3.0t + 0.23 π ) (2) A sinusoidal wave is sent through a stretched string, its wave speed is determined by (a) The amplitude (b) The wavelength (c) The frequency (d) None of above . (3) Kepler’s second law, which says the line between the planet and the sun sweeps out equal areas in equal time intervals, is a direct consequence of (a) Energy conservation (b) Momentum conservation (c) Angular momentum conservation (d) Inverse square law of gravitational force. (4) A remote(r ~ ) asteroid, starting with negligible speed, falls down to the earth due to gravitation. Ignoring forces from other stars and neglecting the earth atmosphere, what is its speed right before it hits earth surface?
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This note was uploaded on 07/28/2010 for the course PHYS 207 taught by Professor Winnokur during the Fall '06 term at Wisconsin.

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Physics 207 Exam 3 Sloution - Physics 207 Exam 3 Nov 18,...

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