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[latex]1 nm = 1*10^{-9} m\1 km = 1*10^{3} m[/latex] [latex]frac{10nm*10^{-2}}{2km} = frac{10*10^{-9}m*10^{-2}}{2*10^{3}m}= 5*frac{10^{-11}}{10^{3}}=5*10^{-14}[/latex]