A square steel bar has a length of 7.2 ft and a 2.5 in by 2.5 in cross section and is subjected to axial tension. The final length is XXXXXXXXXXft . The final side length is XXXXXXXXXXin . What is...

A square steel bar has a length of 7.2 ft and a 2.5 in by 2.5 in cross section and is subjected to axial tension. The final length is 7.20532 ft . The final side length is 2.49946 in . What is Poisson's ratio for the material?

Express your answer to three significant figures.

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Part B -
Calculate the load

A square steel bar has a length of 2.2 ft and a 1.7 in by 1.7 in cross section and is subjected to axial compression. Under load, the thickness becomes 1.70035 in . If the modulus of elasticity is
E
= 2.9×10⁴
ksi and Poisson's ratio is
?
= 0.34; what is the magnitude of the load that was applied to the bar?

Express your answer with appropriate units to three significant figures.

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Part C -
Maximum load

A slider with a square hole is mounted on the bar described in part B (Figure 1) . The largest load the bar ever carries is 116 kip . What is the minimum side length of the square hole so that it will not bind on the bar?

Express your answer with appropriate units to six significant figures.

I jsut need part C