Units of measurement

[DK]

You will have to have an understanding of how the unit of measurement is determined and know how it is applied to any formula you are trying to complete for your next modifications .......

Read these pages to have an understanding of what they are ......

http://www.unc.edu/~rowlett/units/

[DK]

This is another good one :

http://www.mathleague.com/help/metric/metric.htm

[DK]

Units of measure conversion and calculator :

http://www.sciencemadesimple.net/power.php

[DK]

Another good one :

http://physics.nist.gov/cuu/index.html