Solved: Multiple-Concept Example 4 reviews the concepts
Chapter 12, Problem 12.76(choose chapter or problem)
Multiple-Concept Example 4 reviews the concepts that are involved in this problem. A ruler is accurate when the temperature is 25 C. When the temperature drops to 14 C, the ruler shrinks and no longer measures distances accurately. However, the ruler can be made to read correctly if a force of magnitude 1.2 103 N is applied to each end so as to stretch it back to its original length. The ruler has a cross-sectional area of 1.6 10 5 m2 , and it is made from a material whose coefficient of linear expansion is 2.5 10 5 (C) 1 . What is Youngs modulus for the material from which the ruler is made?
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