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General physics
SI Units and Physical Constants
14 terms · by ineedtostudy · updated 4 hours ago
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Terms in this set
Metre (m)
SI base unit of length.
Kilogram (kg)
SI base unit of mass — the only base unit whose name carries a prefix.
Second (s)
SI base unit of time.
Ampere (A)
SI base unit of electric current.
Kelvin (K)
SI base unit of thermodynamic temperature. No degree sign.
Mole (mol)
SI base unit of amount of substance.
Candela (cd)
SI base unit of luminous intensity.
Newton (N)
Derived unit of force: 1 N = 1 kg·m/s².
Joule (J)
Derived unit of energy: 1 J = 1 N·m.
Watt (W)
Derived unit of power: 1 W = 1 J/s.
Speed of light in vacuum (c)
299,792,458 m/s — exact, because the metre is defined from it.
Avogadro constant
6.02214076 × 10^23 per mole — exact since the 2019 SI redefinition.
Elementary charge (e)
1.602176634 × 10^−19 C — exact since 2019.
Standard gravity (g)
9.80665 m/s² by definition; about 9.81 for calculations.