1.7 KiB
1.7 KiB
| obj | wiki | rev |
|---|---|---|
| concept | https://en.wikipedia.org/wiki/International_System_of_Units | 2024-02-08 |
SI Units
The International System of Units (SI) is a modern metric system that is widely used in science, technology, and engineering. It was developed to provide a consistent and coherent framework for measuring physical quantities, and it includes seven base units and several derived units.
Base Units:
The seven base units of the SI system are:
- Meter (m) - length
- Kilogram (kg) - mass
- Second (s) - time
- Ampere (A) - electric current
- Kelvin (K) - thermodynamic temperature
- Mole (mol) - amount of substance
- Candela (cd) - luminous intensity
Prefixes
The SI system uses prefixes to represent multiples and submultiples of the base units. Here are some common prefixes used in the SI system:
| Prefix | Symbol | Multiple |
|---|---|---|
| atto | a |
10^{-18} |
| femto | f |
10^{-15} |
| pico | p |
10^{-12} |
| nano | n |
10^{-9} |
| micro | μ |
10^{-6} |
| milli | m |
10^{-3} |
| centi | c |
10^{-2} |
| deci | d |
10^{-1} |
| Base | - | 10^{0} |
| deca | da |
10^{1} |
| hecto | h |
10^{2} |
| kilo | k |
10^{3} |
| mega | M |
10^{6} |
| giga | G |
10^{9} |
| tera | T |
10^{12} |
| peta | P |
10^{15} |
| exa | E |
10^{18} |
| zetta | Z |
10^{21} |
Derived Units
#refactor #notnow -> add more units