2011年10月18日星期二

Unit conversion

 Unit Conversion
All measurement in science come in two parts: the number and the unit, having one without the other makes no sense!


SI Metric:

1. SI stands for systeme internationale
2. It is a French system dating back to the early 1800s
3. It uses powers of 10!

The Canceling Method for unit conversions:
Derived quantities include units created by combining base quantities through multiplication or division
ex. m^2(m*m)——Area
     cm^3 (cm*cm*cm)——Volume
     km/h  or  m/s——speed
     g/L  ——density

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