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- 1. Understanding Derived and Base Quantities Develop by Qulb e Abbas For feedback:sqjafery@gmail.com
- 2. Understanding Derived and Base QuantitiesPhysical quantities are quantities that can be measured. e.g. Length,Temperature, Speed, Time.Quantities or qualities that cannot be measured are not physicalquantities. e.g. happiness, sadness etc.Physical quantities can be divided into Base quantities and Derivedquantities.(i) Physical quantities are quantities that can be measured or can becalculated.(ii) The base quantities are “building block” quantities from which otherquantities are derived from.(iii) The base quantities and their S.I. units are:
- 3. Base quantities S.I. units• Mass kg• Length m• Time s• Electric current A• Thermodynamic• temperature K
- 4. (iii) Derived quantities are quantities derived Derived quantities S.I. units• area m2• density kg m-3• weight N• velocity m s-1 Standard Notation: To express very large or very small numbers. Example; A X 10 n (ten to the power of n), n must be an integer and 1 ≤ A <10

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