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| Unités physiques |
| Quantite | Unite | Definition | Expression | Dimension |
| longueur | m metre | espace | m | L |
| masse | kg kilogramme | matiere | kg | M |
| temps | s seconde | temps | s | T |
| intensite | A Ampere | intensite electrique | A | I |
| temperature | oK degre Kelvin | temperature absolue | oK | θ |
| longueur | Angstrom | 10-10 m | A | L |
| quantite de matiere | mole | molecule gramme | mol | mol |
| vitesse | m.s-1 | v = dx / dt | m.s-1 | L T-1 |
| acceleration | m.s-2 | γ = d2x / dt2 | m.s-2 | L T-2 |
| impulsion | kg.m.s-1 | p = m . v | kg.m.s-1 | L M T-1 |
| action | kg.m2.s-1 | a = p . x | kg.m2.s-1 | L2 M T-1 |
| force | N Newton | F = m . γ | kg.m.s-2 | L M T-2 |
| energie | J Joule | E = F . x | kg.m2.s-2 | L2 M T-2 |
| puissance | W Watt | P = E / t | kg.m2.s-3 | L2 M T-3 |
| pression | Pa Pascal | pr = F / x2 | kg.m-1.s-2 | L-1 M T-2 |
| charge electrique | Q Coulomb | Q = I . t | A . s | I T |
| potentiel electrique | V Volt | u = P / t | kg.m2.s-3.A-1 | L2 M T-3 I-1 |
| champ electrique | Volt.metre-1 | e = u / x | kg.m.s-3.A-1 | L M T-3 I-1 |
| champ magnetique | Ampere.metre-1 | H = I / x | A.m-1 | L-1 I |
| induction magnetique | T Tesla | B = e / v | kg.s-2.A-1 | M T-2 I-1 |
| flux magnetique | Wb Weber | Φ = B . x2 | kg.m2.s-2.A-1 | L2 M T-2 I-1 |
| resistance electrique | Ω Ohm | R = u / I | kg.m2.s-3.A-2 | L2 M T-3 I-2 |
| inductance electrique | H Henry | L = t . R | kg.m2.s-2.A-2 | L2 M T-2 I-2 |
| capacite electrique | F Farad | C = Q / u | kg-1.m-2.s4.A2 | L-2 M-1 T4 I2 |
| entropie | Joule.Kelvin-1 | S = E / Ta | kg.m2.s-2.K-1 | L2 M T-2 θ-1 |
Toute dimension composee s'ecrit: [ Lα Mβ Tγ Iδ ] Les unites unit sont: Metre, Kilogramme, Seconde, Ampere. Toute unite derivee s'ecrit: [ mα kgβ sγ Aδ ] |