The second version (mN) would likely be confused with milli-newton.
Yes. Because both "MN and "NM" are endpoints.
If M and N represent numbers and are to be multiplied, it doesn't matter if you multiply NM or MN. Just think, 7x8 and 8x7 still = 56.
nm means nanometer, that being the wavelength of that laser.
They are completely unrelated. Don't get confused by the fact that the units look similar. Work units may be force (N) times distance (m); so a Nm is a work unit. Torque units may be distance (m) times force (N); so mN is a torque unit. Look similar, but they describe different things.
14\2
9\6
It is 1,392 miles according to Google Maps.
It is 1,226 miles according to Google Maps.
It is 1,277 miles according to Google Maps.
137miles 2 hours
mm is zero.
4... if you plug it in, it works