9. (1) The Riffel Tower (Fig. 13-29) is built of wrought
Chapter 13, Problem 9(choose chapter or problem)
9. (1) The Riffel Tower (Fig. 13-29) is built of wrought iron approximately 300 m tall. Estimate how much its height changes between July (average temperature of 25C) and January1 (average temperature of 2C). Ignore the angles of the iron beams, and treat the tower as a vertical beam.
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