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  2. Joule - Wikipedia

    en.wikipedia.org/wiki/Joule

    The definition of the joule as J = kgm 2 ⋅s −2 has remained unchanged since 1946, but the joule as a derived unit has inherited changes in the definitions of the second (in 1960 and 1967), the metre (in 1983) and the kilogram . [14]

  3. List of SI electromagnetism units - Wikipedia

    en.wikipedia.org/wiki/List_of_SI...

    A⋅sm −2: ε permittivity: farad per metre: F/m kg −1 ⋅m −3 ⋅A 2 ⋅s 4: χ e electric susceptibility (dimensionless) 1 1 p electric dipole moment: coulomb metre: C⋅m A⋅sm G; Y; B conductance; admittance; susceptance: siemens: S = Ω −1: kg −1 ⋅m −2 ⋅s 3 ⋅A 2: κ, γ, σ conductivity: siemens per metre: S/m kg ...

  4. Joule-second - Wikipedia

    en.wikipedia.org/wiki/Joule-second

    The joule-second also appears in quantum mechanics within the definition of the Planck constant. [2] Angular momentum is the product of an object's moment of inertia, in units of kgm 2 and its angular velocity in units of rad⋅s −1. This product of moment of inertia and angular velocity yields kgm 2 ⋅s −1 or the joule-second. The ...

  5. Units of energy - Wikipedia

    en.wikipedia.org/wiki/Units_of_energy

    The British imperial units and U.S. customary units for both energy and work include the foot-pound force (1.3558 J), the British thermal unit (BTU) which has various values in the region of 1055 J, the horsepower-hour (2.6845 MJ), and the gasoline gallon equivalent (about 120 MJ). Log-base-10 of the ratios between various measures of energy

  6. SI derived unit - Wikipedia

    en.wikipedia.org/wiki/SI_derived_unit

    The SI has special names for 22 of these coherent derived units (for example, hertz, the SI unit of measurement of frequency), but the rest merely reflect their derivation: for example, the square metre (m 2), the SI derived unit of area; and the kilogram per cubic metre (kg/m 3 or kgm −3), the SI derived unit of density.

  7. List of common physics notations - Wikipedia

    en.wikipedia.org/wiki/List_of_common_physics...

    kilogram meter squared (kgm 2) intensity: watt per square meter (W/m 2) imaginary unit: unitless electric current: ampere (A) ^ Cartesian x-axis basis unit vector unitless current density: ampere per square meter (A/m 2) impulse: kilogram meter per second (kgm/s)

  8. Specific energy - Wikipedia

    en.wikipedia.org/wiki/Specific_energy

    Kinetic energy per unit mass: ⁠ 1 / 2 ⁠ v 2, where v is the speed (giving J/kg when v is in m/s). See also kinetic energy per unit mass of projectiles. Potential energy with respect to gravity, close to Earth, per unit mass: gh, where g is the acceleration due to gravity (standardized as ≈9.8 m/s 2) and h is the height above the reference ...

  9. Orders of magnitude (energy) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(energy)

    Kinetic energy of 7.26 kg [91] standard men's shot thrown at 14.7 m/s [citation needed] by the world record holder Randy Barnes [92] 8.01×10 2 J Amount of work needed to lift a man with an average weight (81.7 kg) one meter above Earth (or any planet with Earth gravity) 10 3: kilo-(kJ) 1.1×10 3 J