Monday, May 26, 2008

The International System, or SI (cont.2)

Prefixes

Once we have defined the fundamental units, it is easy to produce larger and smaller units for the same physical quantities. In the metric system these other units are always related to the fundamental units by multiples of 10 or 1/10. Thus one kilometer (1km) is 1000 meters, one centimeter (1cm) is 1/100 meter, and so on. We usually express the multiplicative factors in exponential notation:




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