1.6×10−13 J1.6 \times 10^{-13} \mathrm{~J}1.6×10−13 J
1.6×1013 J1.6 \times 10^{13} \mathrm{~J}1.6×1013 J
1.6×1019 J1.6 \times 10^{19} \mathrm{~J}1.6×1019 J
1.6×10−19 J1.6 \times 10^{-19} \mathrm{~J}1.6×10−19 J
