Physics (SHAP)

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# Based and Derived Quantities and their SI Units

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Based and Derived Quantities and their SI Units

Based Quantities and their SI Units

**Length**: The metric for distance between two points. The SI unit,**Metres (m)**, represents this.**Mass**: A measure of the amount of matter within a body. The SI unit,**Kilogram (kg)**, signifies this.**Time**: The ongoing sequence of events. The SI unit,**Seconds (s)**, denotes it.**Electric Current**: Measures the rate of flow of charge in a circuit. The SI unit,**Ampere (A)**, establishes this.**Thermodynamic Temperature**: A scalar measure of hotness and coldness. The SI unit,**Kelvin (K)**, corresponds to this.**Amount of Substance**: The quantity of matter measured by the number of atoms or molecules. This is denoted by the SI unit**Mol (mol)**.**Luminous Intensity**: The amount of light emitted in a particular direction. The SI unit,**Candela (cd)**, illustrates this.

Derived Quantities and their SI Units

**Area**: Derived from the square of the base unit length (Metres). Si unit -**Square Metre (m²)**.**Volume**: A derived unit from cube of length (Metres). SI unit -**Cubic Metre (m³)**.**Speed/Velocity**: Derived from distance over time. SI unit -**Metre per Second (m/s)**.**Acceleration**: The rate of change of velocity. SI unit -**Metre Per Second Squared (m/s²)**.**Force**: Mass multiplied by acceleration, from Newton's second law of motion. SI unit -**Newton (N)**.**Pressure**: Force per unit area. SI unit -**Pascal (Pa)**.**Energy**: The capacity to do work. SI unit -**Joule (J)**.**Power**: The rate of doing work or the rate of transfer of energy. SI unit -**Watt (W)**.**Frequency**: The number of occurrences of a repeating event per unit of time. SI unit -**Hertz (Hz)**.**Electric Charge**: Process of electric current for a period of time. SI unit -**Coulomb (C)**.