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SI units refer to System International. This is the international system of seven base units, and a number of derived units.

The BIPM, International Bureau of Weights and Measures, in Paris, France maintain this collaboration.

They also produce the collaboration of definitions of multiples and sub-multiples, such as Mega, and Peta; and milli and pico.

Well worth a look at their website.

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6mo ago

The System International (SI) units are a standardized system of units used for measurement in science, including length (meter), mass (kilogram), time (second), electric current (ampere), temperature (kelvin), amount of substance (mole), and luminous intensity (candela). These units provide a consistent and universally recognized way to quantify physical quantities.

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Q: What is si units?
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SI and metric are the same units.


SI is an abbreviation for System of Units?

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What do you call the principal SI units that are used to derive all other SI units?

The principal SI units used to derive all other SI units are the base SI units. These are the units for physical quantities such as length, time, mass, electric current, temperature, amount of substance, and luminous intensity.


Why do scientists use SI units instead of units such as inches and gallons?

most of the world does SI so more people can understand with it in SI units


Why do scientist's use SI units instead of units such as inches and gallons?

most of the world does SI so more people can understand with it in SI units


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SI units are more accurate than English system units


When SI units combine what do they make?

When SI units combine, they create derived SI units that are used to express physical quantities. These derived units are formed by multiplying or dividing the base SI units. Examples include the Newton (kg*m/s^2) for force and the Pascal (N/m^2) for pressure.


How many SI units?

The SI has 7 base units. These units can be combined in an almost unlimited way to form other (derived) units. The Wikipedia article on "SI derived units" lists some examples.


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Si and metric are the same thing. SI was a redefinition of metric in 1960.


Abbreviation for internation system of units?

The abbreviation for the International System of Units is SI.


What the Si units?

It is the International Standard of units.