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Required information

A $1-$in$.$ square was scribed on the side of a large steel pressure vessel. After pressurization the biaxial stress condition at the square is as shown, where ${}_x=14$ksi and ${}_y=6$ksi. Know that $E=29{10}^6$ and $v=0\mathrm{.}30.$

Determine the change in length of side $BC.$

The change in length of side $BC$ is ${10}^{-6}$ in$.$