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13 Angular momentum


Name of unit Symbol Relation to SI units
Action, Angular momentum, L, J
SI unit J·s ≡ kg·m²/s
cgs unit erg·s = 10-7 J·s
atomic unit of action au = /2 ≈ 1.054 571 596×10-34 J·s


14 Electric current


Name of unit Symbol Relation to SI units
Electric current, I
ampere A SI base unit
esu per second ; StatAmpere ( cgs unit) esu/s ≡ (0.1 Am/s)/c ≈ 3.335 641×10-10 A
electromagnetic unit ; AbAmpere ( cgs unit) abamp ≡ 10 A


15 Electric charge


Name of unit Symbol Relation to SI units
Electric charge, Q
coulomb ( SI unit) C ≡ A.s
atomic unit of charge au e ≈ 1.602 176 462×10-19 C
StatCoulomb ; franklin; electrostatic unit ( cgs unit) statC; Fr; esu ≡ (0.1 Am)/c ≈ 3.335 641×10-10 C
AbCoulomb ( cgs unit) AbC ≡ 10 C
Faraday F ≡ 1 mol × NA·e ≈ 96,485.3383 C


16 Electromotive force


Name of unit Symbol Relation to SI units
Voltage, Electromotive force, U
volt ( SI unit) V ≡ kg·m²/A·s³
AbVolt ( cgs unit) abV ≡ 1×10-8 V
StatVolt ( cgs unit) statV ≡ c·(1 μJ/Am) = 299.792 458 V


17 Electrical resistance


Name of unit Symbol Relation to SI units
Electrical resistance, R
ohm ( SI unit) Ω ≡ V/A = kg·m²/A²s³
Dynamic viscosity, η
SI unit Pa·s ≡ N·s/m² = kg/m·s
poise ( cgs unit) P ≡ 10-1 Pa·s


18 Kinematic viscosity


Name of unit Symbol Relation to SI units
Kinematic viscosity, ν
SI unit m²/s ≡ m²/s
stokes ( cgs unit) St ≡ 10-4 m²/s


19 Temperature


Name of unit Symbol Relation to SI units
Temperature, T
kelvin K SI base unit
degree Celsius °C T[°C] = T[K] − 273.15
degree Rankine °R; °Ra T[°Ra] = (9/5)×T[K]
degree Fahrenheit °F T[°F] = T[K] × 1.8 − 459.67

(T[°F] = (9/5)×T[°C] + 32)






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