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  2. Electronvolt - Wikipedia

    en.wikipedia.org/wiki/Electronvolt

    It is common in particle physics, where units of mass and energy are often interchanged, to express mass in units of eV/c 2, where c is the speed of light in vacuum (from E = mc 2). It is common to informally express mass in terms of eV as a unit of mass, effectively using a system of natural units with c set to 1. [3] The kilogram equivalent ...

  3. Atomic units - Wikipedia

    en.wikipedia.org/wiki/Atomic_units

    A set of base units in the atomic system as in one proposal are the electron rest mass, the magnitude of the electronic charge, the Planck constant, and the permittivity. [6] [9] In the atomic units system, each of these takes the value 1; the corresponding values in the International System of Units [10]: 132 are given in the table.

  4. Units of energy - Wikipedia

    en.wikipedia.org/wiki/Units_of_energy

    A unit of electrical energy, particularly for utility bills, is the kilowatt-hour (kWh); [3] one kilowatt-hour is equivalent to 3.6 megajoules. Electricity usage is often given in units of kilowatt-hours per year or other periods. [4] This is a measurement of average power consumption, meaning the average rate at which energy is transferred ...

  5. Plasma parameters - Wikipedia

    en.wikipedia.org/wiki/Plasma_parameters

    The SI unit of temperature is the kelvin (K), but using the above relation the electron temperature is often expressed in terms of the energy unit electronvolt (eV). Each kelvin (1 K) corresponds to 8.617 333 262 ... × 10 −5 eV ; this factor is the ratio of the Boltzmann constant to the elementary charge . [ 6 ]

  6. Hartree - Wikipedia

    en.wikipedia.org/wiki/Hartree

    The hartree (symbol: E h), also known as the Hartree energy, is the unit of energy in the atomic units system, named after the British physicist Douglas Hartree.Its CODATA recommended value is E h = 4.359 744 722 2060 (48) × 10 −18 J ‍ [1] = 27.211 386 245 981 (30) eV.

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

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

    SI units Dimension Number of atoms N = Number of atoms remaining at time t. N 0 = Initial number of atoms at time t = 0 N D = Number of atoms decayed at time t = + dimensionless dimensionless Decay rate, activity of a radioisotope: A = Bq = Hz = s −1 [T] −1: Decay constant: λ

  8. Non-SI units mentioned in the SI - Wikipedia

    en.wikipedia.org/wiki/Non-SI_units_mentioned_in...

    Some common examples of such units are the customary units of time, namely the minute (conversion factor of 60 s/min, since 1 min = 60 s), the hour (3600 s), and the day (86 400 s); the degree (for measuring plane angles, 1° = π ⁄ 180 rad); and the electronvolt (a unit of energy, 1 eV = 1.602 176 634 × 10 −19 J). [2]

  9. System of units of measurement - Wikipedia

    en.wikipedia.org/wiki/System_of_units_of_measurement

    A unit of measurement that applies to money is called a unit of account in economics and unit of measure in accounting. [5] This is normally a currency issued by a country or a fraction thereof; for instance, the US dollar and US cent ( 1 ⁄ 100 of a dollar), or the euro and euro cent.

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