What is a physical quantity?
• It is a quantity that can be measured.
SI Units
| Quantity | SI Unit |
| Length | Metere (m) |
| Mass | Kilogram (kg) |
| Time | Seconds (s) |
| Electric Current | Ampere (A) |
| Thermodynamic Temperature | Kelvin (K) |
| Luminous Intensity | Candela (cd) |
| Amount of Substance | Mole (mol) |