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Reading:

Physical Quantity | Unit | ||
---|---|---|---|

Name | Symbol | Name | Symbol |

mass | m | kilogram | kg |

length | x | metre | m |

time | t | second | s |

electric current | I | ampere | A |

temperature interval | ΔT | kelvin | K |

amount of substance | n | mole | mol |

luminous intensity | I | candela | cd |

‘SI’ comes from the French ‘Le Système International d’Unités’

Symbol cases are significant (e.g. *t* = time; *T* = temperature)

*Quantity** | Symbol (s) | Unit |
---|---|---|

area | A | |

volume | V | |

density | D or ρ | |

velocity | u or v | |

momentum | p | |

acceleration | a | |

force | F | |

work | W |

Physical quantity | symbol (s) | name | symbol | base SI form |
---|---|---|---|---|

force | F | newton | N | |

work & energy | W & E | joule | J | |

power | P | watt | W | |

pressure | p | pascal | Pa | |

electric charge | q or Q | coulomb | C | |

p.d. (voltage) | V | volt | V | |

resistance | R | ohm | Ω | |

frequency | f | hertz | Hz |

multiple | prefix | symbol | example |
---|---|---|---|

kilo | k | km | |

mega | M | MW | |

giga | G | GHz | |

tera | T | Tb | |

peta | P | Pm | |

exa | E | EHz |

multiple | prefix | symbol | example |
---|---|---|---|

/ 10 | deci | d | dB |

/ 100 | centi | c | cm |

/ 1000 | milli | m | mA |

/ 1000 000 | micro | ||

nano | n | nC | |

pico | p | pF | |

femto | f | fm | |

atto | a | as |

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