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Introduction of Units and Measurements

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A unit is an internationally accepted standard for measurements of quantities. Every measurement has two parts. The first is a number (n) and the next is a unit (u). Q = nu.

Fundamental and Derived Quantities

  • The quantities that are independent of other quantities are called fundamental quantities.

  • The units that are used to measure these fundamental quantities are called fundamental units.

  • There are four systems of units namely C. G. S, M. K. S, F. P. S, and SI.

  • The quantities that are derived using the fundamental quantities are called derived quantities.

  • The units that are used to measure these derived quantities are called derived units.

  • Fundamental and Derived units together form a System of Units.

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