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The distance between the towers of the main span of the Golden Gate Bridge near San Francisco is 4200 ft (fig. 21- 21). The sag of the cable halfway between the towers at 50º F is 470 ft. Take α = 6.5 × 10 -6 /Fº for the cable and compute (a) the change in length of the cable and (b) the change in sag for a temperature change from 10 to 90ºF. Assume no bending or separation of the towers and a parabolic shapes for the cable.

The distance between the towers of the main span of the Golden Gate Bridge near San Francisco is 4200 ft (fig. 21- 21). The sag of the cable halfway between the towers at 50º F is 470 ft. Take α = 6.5 × 10-6/Fº  for the cable and compute (a) the change in length of      the cable and (b) the change in sag for a temperature change from 10 to 90ºF. Assume no bending or separation of the towers and a parabolic shapes for the cable.

Grade:11

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