A steel beam is used in the construction of a skyscraper. By what fraction ƒ´L/Lo does the length of the beam increase when the temperature changes from that on a cold winter day (-15.0oF) to that on a summer day (+105.0oF)? Take: ƒÑsteel= 12x10-6/Co

Question

A steel beam is used in the construction of a skyscraper. By what fraction ƒ´L/Lo does the length of the beam increase when the temperature changes from that on a cold winter day (-15.0oF) to that on a summer day (+105.0oF)?  Take: ƒÑsteel= 12x10-6/Co