A structural steel column is 20 meters long and has a square cross-section with a side length of 10 cm. A force of 6 × 105 newtons compresses the column. (This force is equivalent to the weight of several trucks.) Estimate by how much the column’s length decreases, and compare the change in length with the original length of the column. (First, divide the force by the cross-sectional area to calculate the stress σ. When you calculate the area, remember to convert to meter2. Then, use the equation to solve for the change in length, .) Show the steps in your work.