3×106 N⋅m−23 \times 10^{6} \mathrm{~N} \cdot \mathrm{m}^{-2}3×106 N⋅m−2
3×108 N⋅m−23 \times 10^{8} \mathrm{~N} \cdot \mathrm{m}^{-2}3×108 N⋅m−2
3×1010 N⋅m−23 \times 10^{10} \mathrm{~N} \cdot \mathrm{m}^{-2}3×1010 N⋅m−2
3×1012 N⋅m−23 \times 10^{12} \mathrm{~N} \cdot \mathrm{m}^{-2}3×1012 N⋅m−2