what do u mean by derived quantiy?
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An example is the joule J, the coherent derived SI unit for the derived quantity energy: "joule" is the special name for the "kilogram meter squared per second squared" and "J" is the special symbol for "[s.
A small number of base quantities that are assumed to be independent are chosen from the system of quantities such that any other quantity of the system, called a derived quantity, can be expressed as a function of the base quantities.
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Explanation:
Pure calcium carbonate can be produced from marble, or it can be prepared by passing carbon dioxide into a solution of calcium hydroxide. In the later case calcium carbonate is derived from the mixture, forming a grade of product called "precipitated calcium carbonate,” or PCC.
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