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  2. List of physical quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_physical_quantities

    Energy per unit temperature change J/K L 2 M T −2 Θ −1: extensive Heat flux density: ϕ Q: Heat flow per unit time per unit surface area W/m 2: M T −3: Illuminance: E v: Wavelength-weighted luminous flux per unit surface area lux (lx = cd⋅sr/m 2) L −2 J: Impedance: Z: Resistance to an alternating current of a given frequency ...

  3. SI base unit - Wikipedia

    en.wikipedia.org/wiki/SI_base_unit

    "The kelvin, symbol K, is the SI unit of thermodynamic temperature. It is defined by taking the fixed numerical value of the Boltzmann constant k to be 1.380 649 × 10 −23 when expressed in the unit J K −1, which is equal to kg m 2 s −2 K −1, where the kilogram, metre and second are defined in terms of h, c and ∆ν Cs." [1]

  4. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    The fourth unit could be chosen to be electric current, voltage, or electrical resistance. [35] Electric current with named unit 'ampere' was chosen as the base unit, and the other electrical quantities derived from it according to the laws of physics. When combined with the MKS the new system, known as MKSA, was approved in 1946. [4]

  5. Watt - Wikipedia

    en.wikipedia.org/wiki/Watt

    The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m 2 ⋅s −3. [1] [2] [3] It is used to quantify the rate of energy transfer.

  6. Work (physics) - Wikipedia

    en.wikipedia.org/wiki/Work_(physics)

    As the unit name suggests, it is the product of pounds for the unit of force and feet for the unit of displacement. One joule is approximately equal to 0.7376 ft-lbs. [ 13 ] [ 14 ] Non-SI units of work include the newton-metre, erg , the foot-pound, the foot-poundal , the kilowatt hour , the litre-atmosphere , and the horsepower-hour .

  7. List of common physics notations - Wikipedia

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

    Cartesian y-axis basis unit vector unitless kinetic energy: joule (J) wave vector: radian per meter (m −1) Boltzmann constant: joule per kelvin (J/K) wavenumber: radian per meter (m −1) stiffness: newton per meter (N⋅m −1) ^ Cartesian z-axis basis unit vector

  8. Tesla (unit) - Wikipedia

    en.wikipedia.org/wiki/Tesla_(unit)

    The tesla (symbol: T) is the unit of magnetic flux density (also called magnetic B-field strength) in the International System of Units (SI).. One tesla is equal to one weber per square metre.

  9. Physical quantity - Wikipedia

    en.wikipedia.org/wiki/Physical_quantity

    A physical quantity can be expressed as a value, which is the algebraic multiplication of a numerical value and a unit of measurement. For example, the physical quantity mass , symbol m , can be quantified as m = n kg, where n is the numerical value and kg is the unit symbol (for kilogram ).

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