Q:
# What is a derived quantity?

**A derived quantity is a quantity that is based on the result of a systematic equation that includes any of the seven basic quantities, which are the kilogram, meter, second, ampere, kelvin, mole and candela.** Examples of derived quantities include area (square meters), speed (meters per second) and frequency (hertz).

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Most derived quantities have been assigned special names and symbols because of their complexity of presenting them using base units. An example of this is the newton, which is a unit of force that equates to the amount of force needed to accelerate 1 kilogram by 1 meter per second per second. Two of the derived quantities, the radian and steradian, are dimensionless.

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