# College Physics Essay

6023 Words May 28th, 2013 25 Pages
Wilson, College Physics, 6th Edition
Chapter 9
Exercises

MC = Multiple Choice Question, CQ = Conceptual Question, and IE = Integrated Exercise. Throughout the text, many exercise sections will include “paired” exercises. These exercise pairs, identified with red numbers, are intended to assist you in problem solving and learning. In a pair, the first exercise (even numbered) is worked out in the Study Guide so that you can consult it should you need assistance in solving it. The second exercise (odd numbered) is similar in nature, and its answer is given at the back of the book.

9.1 Solids and Elastic Moduli
Use as many significant figures as you need to show small changes.
1. MC The pressure on an elastic body is described by
Assuming the femur is 0.650 m long and has a radius of 2.00 cm, by how much is the bone compressed? [pic]
20. (( Two metal plates are held together by two steel rivets, each of diameter 0.20 cm and length 1.0 cm. How much force must be applied parallel to the plates to shear off both rivets? [pic] 21. IE (( (a) Which of the liquids in Table 9.1 has the greatest compressibility? Why? (b) For equal volumes of ethyl alcohol and water, which would require more pressure to be compressed by 0.10%, and how many times more? (a) ethyl alcohol (b) [pic]
22. ((( A brass cube 6.0 cm on each side is placed in a pressure chamber and subjected to a pressure of [pic] on all of its surfaces. By how much will each side be compressed under this pressure? [pic]
23. ((( A cylindrical eraser of negligible mass is dragged across a paper at a constant velocity to the right by its pencil. The coefficient of kinetic friction between eraser and paper is 0.650. The pencil pushes down with 4.20 N. The height of the eraser is 1.10 cm and its diameter is 0.760 cm. Its top surface is displaced horizontally 0.910 mm relative to the bottom. Determine the shear modulus of the eraser material. [pic]
24. ((( A 45-kg traffic light is suspended from two steel cables of equal length and radii 0.50 cm. If each cable makes a 15° angle with the horizontal, what is the fractional increase in their length due to the weight of the light? [pic]

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