1. The problem statement, all variables and given/known data I am given some measurements and I am supposed to express them as standard SI units. I can't find any examples of this done online or extra practice exercises to help me. I am probably googling the wrong words. I have been out of school for quite a while and I don't know what some of the abbreviations stand for, and a lot of letters seem to double up in physics. 105km 57mm 6.67x10-11cm 6x1027 grams 9 grams per cubic centimetre 100 km h-1 5 nN 10μW 5Gm I don't know what G, or μ or h (hour?) stand for here. 2. Relevant equations 3. The attempt at a solution 105km - 105 x 10-3m - This is wrong. It should be 1.05x 105m (But I think I understand why) 57mm - 5.7 x 10-2m 6.67x10-11cm - 6.67x10-12m - Wrong 6.67x10-13m (because there are 2 zeros in 100, not one, wupps) 6x1027 grams 6x1024kg 9 grams per cubic centimetre - ? 100 km h-1 -? I assume h is hour. 5 nN - ? 10μW - ? 5Gm - ? I already know the answers, clues about how to get them for myself would be brilliant, thanks everyone.