A steel rod with a cross sectional area of 120 mm^2 is stretched between two fixed points. The tensile load at 20°C is 4200N. What will be the stress at -25°C? ?=11.7x10^(-6)/°C and E = 200GPa. See figure 06. Figure 06 L 120 MPa 130 MPa 140 MPa 150 MPa
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