1 micrometre = 1000 nanometres. You now have all the information required to answer this and similar questions.
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0.278 nm = 0.000278 µm
4.92e-9 m Algebraic Steps / Dimensional Analysis Formula 4.92 nm*1 m 1000000000 nm=4.92e-9 m
To convert 5.6 x 10^-7 meters to nanometers, you can use the conversion factor that 1 meter equals 1 billion nanometers (1 m = 10^9 nm). Therefore, you multiply 5.6 x 10^-7 m by 10^9 nm/m: 5.6 x 10^-7 m × 10^9 nm/m = 5.6 x 10^2 nm. This simplifies to 560 nm.
1 nm = 10-9 m so 0.12 nm = 0.12*10-9 m = 1.2*10-10 m.
4 & 9 For any two unknown numbers, we can say nm = 36 n + m = 13 Hence n = 13 - m Substitute (13 - m) m = 36 Multiply out 13m - m^2 = 36 m^2 - 13m + 36 = 0 factor ( m -9)( m - 4) = 0 Hence m = 4 & m = 9 NB THis is good for any two unknown numbers, to be found against any constant.