7.5×1011 N/m27.5\times 10^{11}\mathrm{~N}/\mathrm{m}^27.5×1011 N/m2
3×1010 N/m23\times 10^{10}\mathrm{~N}/\mathrm{m}^23×1010 N/m2
5.33×1010 N/m25.33\times 10^{10}\mathrm{~N}/\mathrm{m}^25.33×1010 N/m2
4×1010 N/m24\times 10^{10}\mathrm{~N}/\mathrm{m}^24×1010 N/m2