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


A. SI units

B. Derived units

C. Lowest units

D. Base units

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smmwaite

Answer

D. Base units

Explanation

Basic units are also called fundamental units. They are the standard units agreed internationally for measurements. Most of these measurements are taken from the ground and they are used to derive other units. They are seven in number. There are:

The metre (m)

The kilogram (kg)

The second (s)

The ampere (A)

The kelvin (K)

The candela (cd)

The mole (mol)

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