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An elevated open stairway (like the one in the SAC!) is designed to be supported by four steel rods connecting the stairway to the ceiling. The weight of the stairway plus a full load of people is 9577 pounds. If the rods are 0.9 inches in diameter and the allowable stress of the steel used is 80,000 psi, what is the safety factor of this design?
assume that a sample is used to estimate a population proportion p. find the margin of error e that corresponds to the
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the maximum allowable value of each of the reactions is 180 N neglecting of the weight of beam, determine the range of te distance d for which the beam is safe.
Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an elliptically shaped surface crack of length 0.16 mm and that has a tip radius of curvature of 0.002 mm when a stress of 1..
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