2211_quiz2_key

2211_quiz2_key - Physics 2211 Spring 2009, Lab 5, Quiz 2...

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Unformatted text preview: Physics 2211 Spring 2009, Lab 5, Quiz 2 Name: Section Score: Show all work clearly and in order, and box your final answers . If you cannot do some portion of a problem, invent a symbol for the quantity you cannot calculate (explain that you are doing this), and use it to do the rest of the problem. By writing your name on this quiz you agree that this quiz was taken in accordance with the Georgia Tech Honor Code. One mole of titanium (6 10 23 atoms) has a mass of 48 grams, and its density is 4.54 grams per cubic centimeter. You have a long thin bar of titanium, 2.9 m long, with a square cross section, 0.08 cm on a side. You hang the rod vertically and attach a 41 kg mass to the bottom, and you observe that the bar becomes 1.52 cm longer. From these measurements, it is possible to determine the stiffness of one interatomic bond in titanium. 1. ( 30 points ) What is the spring stiffness k s of the entire bar, considered as a single macro- scopic (large scale), very stiff spring? Start from the Momentum Principle.scopic (large scale), very stiff spring?...
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2211_quiz2_key - Physics 2211 Spring 2009, Lab 5, Quiz 2...

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