SI Prefixes and “Scaled” Units
- There are 20 SI prefixes used to form multiples and submultiples of SI units
- When these are used in the SDCS, we refer to them as scaled SI units.
- Consider the earlier example of the height of the Washington Monument. We may write hW = 169 000 mm = 16 900 cm = 169 m = 0.169 km using the millimeter (SI prefix milli, symbol m), centimeter (SI prefix centi, symbol c), or kilometer (SI prefix kilo, symbol k).