1.6×10−7N1.6 \times 10^{-7} N1.6×10−7N
3.2×10−7N3.2 \times 10^{-7} N3.2×10−7N
1.6×10−8N1.6 \times 10^{-8} N1.6×10−8N
3.2×10−8N3.2 \times 10^{-8} N3.2×10−8N
