it is important because it is used to report results and perform calculations. it is used throughout the world to express measurements in metric units
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The International System of units
Virtually everyone throughout the world uses exactly the same measurement.
The only major country that does not comply is the US.
Using the SI system it is possible for different people to build things to a plan and have all the components fit together at the end.
A kilometre is a measurement in the SI system.
The SI unit for mass measurement is the kilogram (kg).
The measurement of distance in the International System of Units (SI) is the meter (m).
No, Fahrenheit is not a proper SI unit of measurement. The International System of Units (SI) uses Celsius as the standard unit for temperature measurement, with kelvin also being commonly used for scientific purposes.
The SI unit of measurement for all forms of energy is the joule (J).