Khan/khan-exercises — pull request #27567 by henrikmidtiby (2012-08-08 12:57:24+00:00)
Title: Unit conversion

Small exercise on how to change from different speed measure to SI units.
The goal is to include exponents of "m", "kg", and "s" and thus check if quantities like force (newton) can be converted to the correct SI units.

There is a related exercise at http://www.khanacademy.org/math/arithmetic/rates-and-ratios/e/units