EXAM_2_&ndash;_Fall2011_Practice[1]

# EXAM_2&ndash_Fall2011_Practice[1]

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Unformatted text preview: that temperature? A) T = 49.8 ° C B) T = 105.2 ° C C) T =  ­10.4 ° C D) T = 75.9 ° C E) T = 33.7 ° C Problem 7. The figure below is a graph of the energy of a system of a planet interacting with a star. The gravitational potential energy Ug is shown as the thick curve, and plotted along the vertical axis are various values of K+Ug. Suppose that K+Ug of the system is A. Find all of the true statements below. 1. The potential energy of the system decreases as the planet moves from r1 to r2. 2. The potential energy of the system increases as the planet moves from r1 to r2. 3. When the separation between the two bodies is r2, the kinetic energy of the system is A ­B. 4. The system is a bound system; the planet can never escape. 5. The path traced by this orbiting system is a circle. 6. When the sep...
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## This document was uploaded on 03/25/2014 for the course PHYS 172 at Purdue University-West Lafayette.

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