SI base and derived units, homogeneity of equations, prefixes, scalars and vectors, and the treatment of errors and uncertainties.
Physical quantities
Every physical quantity has a numerical magnitude and a unit. The seven SI base quantities and units are:
| Base quantity | Symbol | SI unit |
|---|---|---|
| mass | kilogram (kg) | |
| length | metre (m) | |
| time | second (s) | |
| electric current | ampere (A) | |
| temperature | kelvin (K) | |
| amount of substance | mole (mol) |
Derived units are products/quotients of base units, e.g. the newton: , and the joule: .
Viewing only
This content is free to read on superexams.com and cannot be printed or downloaded.
Read the full note, free
Create a free account to read this note in full. Every free account gets 2 complete revision notes, no card needed.