An electronvolt (symbol: eV) is the amount of kinetic energy gained by a single unbound electron when it passes through an electrostatic potential difference of one volt, in vacuum. The one-word spelling is the modern recommendation; the use of the earlier electron volt still exists. This is a very small amount of energy: Kinetic energy is energy that a body has as a result of its speed. ... Properties The electron is a fundamental subatomic particle which carries a negative electric charge. ... It has been suggested that this article or section be merged with static electricity. ... The volt (symbol: V) is the SI derived unit of electric potential difference. ... For other uses, see vacuum cleaner and Vacuum (musical group). ...

1 eV = 1.602 176 53 (14) × 10⁻¹⁹ J. (Source: CODATA 2002 recommended values)

It is a non-SI unit of energy, accepted for use with SI. To help compare different orders of magnitude we list here energies between 10−19 joules and 10−18 joules (0. ... The joule (symbol: J) is the SI unit of energy, or work. ... CODATA (Committee on Data for Science and Technology) was established in 1966 as an interdisciplinary committee of the International Council of Science (ICSU), formerly the International Council of Scientific Unions. ... The International System of Units (abbreviated SI from the French language name Système International dUnités) is the most widely used system of units. ... The International System of Units (abbreviated SI from the French language name Système International dUnités) is the most widely used system of units. ...

Using electronvolts to measure mass

Einstein reasoned that energy is equivalent to (rest) mass, as famously expressed in the formula E=mc² (1 kg = 90 petajoules). It is thus common in particle physics, where mass and energy are often interchanged, to use eV/c² or even simply eV as a unit of mass. (The latter is often paired with natural units where c=1, but this is not strictly necessary.) The eV is also commonly used in Quantum Mechanics as atomic binding energies, for example, are of the order of eV's. Albert Einstein photographed by Oren J. Turner in 1947. ... Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. ... E=mc² is a physical equation, first given by Albert Einstein in his 1905 paper Ist die Trägheit eines Körpers von seinem Energieinhalt abhängig? (Does the Inertia of a Body Depend Upon Its Energy Content?, published in Annalen der Physik on September 27), one of the articles... Particles erupt from the collision point of two relativistic (100GeV) gold ions in the STAR detector of the Relativistic Heavy Ion Collider. ... In physics, Planck units are physical units of measurement originally proposed by Max Planck. ... Cherenkov effect in a swimming pool nuclear reactor. ... Fig. ...

For example, an electron and a positron, each with a mass of 0.511 MeV, can annihilate to yield 1.022 MeV of energy. The proton, a typical baryon, has a mass of 0.938 GeV, making GeV (often pronounced jev) a very convenient unit of mass for particle physics. The first detection of the positron in 1932 by Carl D. Anderson The positron is the antiparticle or the antimatter counterpart of the electron. ... Properties In physics, the proton (Greek proton = first) is a subatomic particle with an electric charge of one positive fundamental unit (1. ... In particle physics, the baryons are a family of subatomic particles including the proton and the neutron (collectively called nucleons), as well as a number of unstable, heavier particles (called hyperons). ... Particles erupt from the collision point of two relativistic (100GeV) gold ions in the STAR detector of the Relativistic Heavy Ion Collider. ...

1 eV/c² = 1.783 × 10⁻³⁶ kg

1 keV/c² = 1.783 × 10⁻³³ kg

1 MeV/c² = 1.783 × 10⁻³⁰ kg

1 GeV/c² = 1.783 × 10⁻²⁷ kg

(Redirected from 1 E-30 kg) Categories: Orders of magnitude (mass) ... To help compare different orders of magnitude we list here masses between 0. ...

Electronvolts and kinetic energy

For comparison:

• 3.2 × 10⁻¹¹ joule or 200 MeV - total energy released in nuclear fission of one U-235 atom (on average, it depends on the precise break up)
• 3.5 × 10⁻¹¹ joule or 210 MeV - total energy released in fission of one Pu-239 atom (on average, it depends on the precise break up)
• The typical atmospheric molecule has an energy of about 0.03 eV. This corresponds to room temperature.

To convert a particle's kinetic energy in electronvolts into its temperature in kelvins, multiply by 11,605 (see Boltzmann constant). Sketch of induced nuclear fission, a neutron (n) strikes a uranium nucleus which splits into similar products (F. P.), and releases more neutrons to continue the process, and energy in the form of gamma and other radiation. ... To help compare different orders of magnitude we list here energies between 10−21 joule and 10−20 joule (0. ... Room temperature, in laboratory reports, is taken to be roughly 21–23 degrees Celsius (70 degrees Fahrenheit), or 294–296 kelvins. ... Kinetic energy is energy that a body has as a result of its speed. ... The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ... The Boltzmann constant (k or kB) is the physical constant relating temperature to energy. ...

See also

• Orders of magnitude (energy)

To help compare different orders of magnitude, the following list describes various energy levels between 10−31 joules and 1070 joules. ...

External links

• BIPM's definition of the electronvolt
• Conversion Calculator for Units of ENERGY
• http://physics.nist.gov/cuu/Constants physical constants reference; CODATA data