the_mikey
Legendary Member
- Location
- South Gloucestershire
I'm not used to seeing the above formats of metric units and sub-units of measurement
1µm = 1 x 10[sup]-6 [/sup]m
1mm = 1 x 10-3 m
1cm = 1 x 10[sup]-2[/sup] m
1km = 1 x 10[sup]3[/sup]m
1Mn = 1 x 10[sup]6[/sup]m
I've never encountered the megametre before and had to look it up. It's rarely used and thousands of kilometres are more often than not expressed in full e.g. 5000km rather than 5Mm. It also apparently avoids the possibility of 5Mm being confused with 5mm.
I agree, no one would really use Mega metres, for that very reason, and yes the way you represent the numbers is fine also. I think the letter prefixes just come from being an engineer.
Trivially, and all the others you missed out, your point being?
It was a response to someones disliking of cm as a unit of measurement, with which I proceeded to make a mess with! I hope someone got the point and context of my post
