Contents
•Derived of Fundamental
•Constituent units
•The units
•The SI unit
Derived or Fundamental
•Derived quantity is expressed in terms of other quantities.
•Fundamental quantities are not expressed in terms of other quantities.
•This means density is a derived quantity.
Constituents
•Density is expressed in terms of mass and volume.
•Volume is measured in litres(l) or gram per cubic centimeter (
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3).
•Mass is measured in Kilogram (Kg) or gram (g)
The Units
•Involving Kg and l (
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�).
•Involving g and ????????????
3
(
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??????�
3).
•These are the two most commonly used units for measuring density.
The SI Unit
•Not all units are SI units.
•SI units are internationally recognized.
•
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�and
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??????�
3are the commonly used units for density.
•However
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??????�
3is the actual SI unit.