Homework 2: Problem 7:   When builders were constructing a sidewalk they forgot to include an expansion joint between two of the segments, L = 1.7 m at To = 20° C. Assume the opposite ends of each segment are fixed and the linear expansion coefficient is α = 11.8 × 10-6 °C-1. Part (a)  As the day heats to Tb the segments press against each other and begin to raise the junction a distance h forming a triangle. What is the height (in meters) at Tb=110° F? h = ______ m Part (b)  What should the gap have been, in units of meters, to prevent them from touching? g = ______m

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