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  2. Magnetic susceptibility - Wikipedia

    en.wikipedia.org/wiki/Magnetic_susceptibility

    For example, the CGS volume magnetic susceptibility of water at 20 °C is 7.19 × 10 −7, which is 9.04 × 10 −6 using the SI convention, both quantities being dimensionless. Whereas for most electromagnetic quantities, which system of quantities it belongs to can be disambiguated by incompatibility of their units, this is not true for the ...

  3. List of physical quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_physical_quantities

    Number of (periodic) occurrences per unit time hertz (Hz = s −1) T −1: scalar Half-life: t 1/2: Time for a quantity to decay to half its initial value s T: Heat: Q: Thermal energy: joule (J) L 2 M T −2: Heat capacity: C p: Energy per unit temperature change J/K L 2 M T −2 Θ −1: extensive Heat flux density: ϕ Q: Heat flow per unit ...

  4. Chi (unit) - Wikipedia

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

    The chi (Tongyong Pinyin chih) is a traditional Chinese unit of length. Although it is often translated as the " Chinese foot ", its length was originally derived from the distance measured by a human hand, from the tip of the thumb to the tip of the forefinger, and is similar to the ancient span .

  5. Curie–Weiss law - Wikipedia

    en.wikipedia.org/wiki/Curie–Weiss_law

    Here μ 0 is the permeability of free space; M the magnetization (magnetic moment per unit volume), B = μ 0 H is the magnetic field, and C the material-specific Curie constant: = (+), where k B is the Boltzmann constant, N the number of magnetic atoms (or molecules) per unit volume, g the Landé g-factor, μ B the Bohr magneton, J the angular ...

  6. 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

  7. List of electromagnetism equations - Wikipedia

    en.wikipedia.org/wiki/List_of_electromagnetism...

    Continuous charge distribution. The volume charge density ρ is the amount of charge per unit volume (cube), surface charge density σ is amount per unit surface area (circle) with outward unit normal n̂, d is the dipole moment between two point charges, the volume density of these is the polarization density P.

  8. Curie's law - Wikipedia

    en.wikipedia.org/wiki/Curie's_law

    The magnetization is the negative derivative of the free energy with respect to the applied field, and so the magnetization per unit volume is = ⁡, where n is the number density of magnetic moments. [1]: 117 The formula above is known as the Langevin paramagnetic equation.

  9. List of equations in nuclear and particle physics - Wikipedia

    en.wikipedia.org/wiki/List_of_equations_in...

    Absorbed dose, total ionizing dose (total energy of radiation transferred to unit mass) D can only be found experimentally ... With Modern Physics (6th ed.).