A 2\" times 4\" rectangular section is used is a design with height limitations.

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A 2" times 4" rectangular section is used is a design with height limitations. The section is typically subjected to pure torsion. It has been suggested that the rectangular section be replaced with an elliptical section with the same height (4") and that the area of the elliptical section be identical to that of the rectangular section. Determine the ratio of the maximum shearing stress for the rectangular section to that of the elliptical section, and the ratio of the angular rotation of the two sections. Summarize the results and make a suggestion regarding the use of the ellipse as opposed to the rectangle

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