1N1 N1N
6.67×10−11N6.67 \times 10^{-11} N6.67×10−11N
6.67×10−6N6.67 \times 10^{-6} N6.67×10−6N
6.67×10−12N6.67 \times 10^{-12} N6.67×10−12N
