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1 joule [J] = 6.241506363094E+15 kiloelectronvolt [keV]

Initial value

Converted value

joule gigajoule megajoule kilojoule millijoule microjoule nanojoule picojoule attojoule megaelectronvolt kiloelectronvolt electronvolt millielectronvolt microelectronvolt nanoelectronvolt picoelectronvolt erg gigawatt-hour megawatt-hour kilowatt-hour kilowatt-second watt-hour watt-second newton meter Horsepower-hour horsepower (metric) -hour international kilocalorie thermochemical kilocalorie international calorie thermochemical calorie large (food) cal. brit. term. unit (IT) Brit. term. thermal unit mega BTU (IT) tonne-hour (refrigeration capacity) tonne oil equivalent barrel of oil equivalent (US) gigatonne megatonne TNT kilotonne TNT tonne TNT dyne-centimeter gram-force-meter gram-force-centimeter kilogram-force-centimeter kilogram -force-meter kilopond-meter pound-force-foot pound-force-inch ounce-force-inch ft-pound inch-pound inch-ounce pound-feet therm therm (UEC) therm (US) Hartree energy gigaton oil equivalent megaton equivalent oil equivalent of a kilobarrel of oil equivalent of a billion barrels of oil kilogram of trinitrotoluene Planck energy kilogram inverse meter hertz gigahertz terahertz kelvin atomic mass unit

Logarithmic units

More about energy

General information

Energy is a physical quantity of great importance in chemistry, physics, and biology. Without it, life on earth and movement are impossible. In physics, energy is a measure of the interaction of matter, as a result of which work is performed or there is a transition of one type of energy to another. In the SI system, energy is measured in joules. One joule is equal to the energy expended when moving a body one meter with a force of one newton.

Energy in physics

Kinetic and potential energy

Kinetic energy of a body of mass m moving at a speed v equal to the work done by the force to give the body speed v. Work is defined here as a measure of the action of a force that moves a body a distance s. In other words, it is the energy of a moving body. If the body is at rest, then the energy of such a body is called potential energy. This is the energy needed to keep the body in that state.

For example, when a tennis ball hits a racket in mid-flight, it stops for a moment. This is because the forces of repulsion and gravity cause the ball to freeze in the air. At this point, the ball has potential but no kinetic energy. When the ball bounces off the racket and flies away, on the contrary, it has kinetic energy. A moving body has both potential and kinetic energy, and one type of energy is converted into another. If, for example, a stone is tossed up, it will begin to slow down during the flight. As this deceleration progresses, kinetic energy is converted into potential energy. This transformation occurs until the supply of kinetic energy runs out. At this point, the stone will stop and potential energy reaches the maximum value. After that, it will begin to fall down with acceleration, and the energy conversion will occur in the reverse order. The kinetic energy will reach its maximum when the stone collides with the Earth.

The law of conservation of energy states that the total energy in a closed system is conserved. The energy of the stone in the previous example changes from one form to another, and therefore, despite the fact that the amount of potential and kinetic energy changes during the flight and fall, the total sum of these two energies remains constant.

Energy production

People have long learned to use energy to solve labor-intensive tasks with the help of technology. Potential and kinetic energy are used to do work, such as moving objects. For example, the energy of the flow of river water has long been used to produce flour in water mills. How more people uses technology, such as cars and computers, to Everyday life, the greater the need for energy. Today, most of the energy is generated from non-renewable sources. That is, energy is obtained from fuel extracted from the bowels of the Earth, and it is quickly used, but not renewed with the same speed. Such fuels are, for example, coal, oil and uranium, which are used in nuclear power plants. IN last years Governments of many countries, as well as many international organizations, such as the UN, consider it a priority to explore the possibilities of obtaining renewable energy from inexhaustible sources using new technologies. Many scientific studies are aimed at obtaining these types of energy at the lowest cost. Currently, sources such as the sun, wind and waves are used to obtain renewable energy.

Energy for household and industrial use is usually converted into electricity using batteries and generators. The first power plants in history generated electricity by burning coal, or using the energy of water in rivers. Later, they learned to use oil, gas, sun and wind to generate energy. Some large enterprises maintain their power plants on the premises of the enterprise, but most of the energy is not produced where it will be used, but in power plants. Therefore, the main task of power engineers is to convert the produced energy into a form that makes it easy to deliver energy to the consumer. This is especially important when expensive or dangerous energy production technologies are used that require constant supervision by specialists, such as hydro and nuclear power. That is why electricity was chosen for domestic and industrial use, as it is easy to transmit with low losses over long distances through power lines.

Electricity is converted from mechanical, thermal and other types of energy. To do this, water, steam, heated gas or air set in motion turbines that rotate generators, where mechanical energy is converted into electrical energy. Steam is produced by heating water with heat generated by nuclear reactions or by burning fossil fuels. Fossil fuels are extracted from the bowels of the Earth. These are gas, oil, coal and other combustible materials formed underground. Since their number is limited, they are classified as non-renewable fuels. Renewable energy sources are solar, wind, biomass, ocean energy, and geothermal energy.

In remote areas where there are no power lines, or where power is cut off regularly due to economic or political problems, portable generators and solar panels are used. Fossil-fueled generators are especially common in both households and in organizations where electricity is absolutely necessary, such as hospitals. Typically, generators operate on piston engines, in which the energy of the fuel is converted into mechanical energy. Also popular are uninterruptible power devices with powerful batteries that charge when electricity is supplied and give energy during power outages.

Do you find it difficult to translate units of measurement from one language to another? Colleagues are ready to help you. Post a question to TCTerms and within a few minutes you will receive an answer.

> Electronvolt

Find out how to make a transfer electron-volt in joules. Read the definition of electronvolt, potential difference, particle accelerator, mass, inertia, wavelength.

Electron-volt- a unit of energy used in the physics of elementary charges and electricity.

Learning task

• Convert electronvolt and units of energy.

Key Points

• An electron volt is the amount of energy gained or lost by an electron charge moving along a one-volt electrical potential difference (1.602 × 10 -19 J).
• The electronvolt has gained popularity in science due to experiments. Typically, scientists dealing with electrostatic particle accelerators used the ratio of energy, charge and potential difference: E = qV.
• The electron volt can be used in various calculations.

Terms

• A particle accelerator is a device that accelerates charged particles to incredibly high speeds in order to induce high-energy reactions and obtain high energy.
• Potential difference is the difference in potential energy between two points in an electric field.
• An electron volt is a unit of measurement for the energy of subatomic particles (1.6022 × 10 -19 J).

Overview

The electron volt (eV) is the unit of energy used in physics for elemental charges and electricity. We are talking about the amount of energy that the charge of an electron gains or loses, moving along a one-volt electrical potential difference. You need to know how to convert electron volts to joules. Value - 1.602 × 10 -19 J.

The electron volt is not included in the list of official units, but has become useful due to its use in numerous experiments. Particle accelerator researchers used the ratio of energy, charge, and potential difference:

All calculations were quantized to an elementary charge at a specific voltage, which is why the electron volt began to be used as a unit of measurement.

Inertia

Electronvolt and momentum are measurements of energy. Using the potential difference with the electron, we get the energy, which manifests itself in the movement of the electron. It has mass, speed and momentum. If we divide the electron volt by a constant with units of speed, we get momentum.

Weight

Mass is equivalent to energy, so the electron volt affects the mass. The formula E = mc 2 can be rearranged to solve the mass:

Wavelength

Energy, frequency and wavelength are related by the relation:

(h is Planck's constant, c is the speed of light).

As a result, a photon with a wavelength of 532 nm (green light) would have an energy of about 2.33 eV. Similarly, 1 eV would correspond to an infrared photon whose wavelength is 1240 nm.

Relationship between wavelength and energy, expressed in electronvolts

Temperature

In plasma physics, the electron voltage can be used as a unit of temperature. To convert to Kelvin, divide the 1eV value by the Boltzmann constant: 1.3806505 (24) × 10 -23 J/K.

Length and Distance Converter Mass Converter Bulk Food and Food Volume Converter Area Converter Volume and Recipe Units Converter Temperature Converter Pressure, Stress, Young's Modulus Converter Energy and Work Converter Power Converter Force Converter Time Converter Linear Velocity Converter Flat Angle Converter thermal efficiency and fuel efficiency Converter of numbers in different number systems Converter of units of measurement of quantity of information Currency rates Dimensions of women's clothing and shoes Dimensions of men's clothing and shoes Angular velocity and rotational frequency converter Acceleration converter Angular acceleration converter Density converter Specific volume converter Moment of inertia converter Moment of force converter Torque converter Specific calorific value converter (by mass) Energy density and fuel specific calorific value converter (by volume) Temperature difference converter Coefficient converter Thermal Expansion Coefficient Thermal Resistance Converter Thermal Conductivity Converter Specific Heat Capacity Converter Energy Exposure and Radiant Power Converter Heat Flux Density Converter Heat Transfer Coefficient Converter Volume Flow Converter Mass Flow Converter Molar Flow Converter Mass Flux Density Converter Molar Concentration Converter Mass Concentration in Solution Converter Dynamic ( Kinematic Viscosity Converter Surface Tension Converter Vapor Permeability Converter Water Vapor Flux Density Converter Sound Level Converter Microphone Sensitivity Converter Sound Pressure Level (SPL) Converter Sound Pressure Level Converter with Selectable Reference Pressure Brightness Converter Luminous Intensity Converter Illuminance Converter Computer Graphics Resolution Converter Frequency and wavelength converter Power in diopters and focal length Distance Power in Diopters and Lens Magnification (×) Electric Charge Converter Linear Charge Density Converter Surface Charge Density Converter Volumetric Charge Density Converter Electric Current Converter Linear Current Density Converter Surface Current Density Converter Electric Field Strength Converter Electrostatic Potential and Voltage Converter Electrical Resistance Converter Converter Electrical Resistance Electrical Conductivity Converter Electrical Conductivity Converter Capacitance Inductance Converter US Wire Gauge Converter Levels in dBm (dBm or dBm), dBV (dBV), watts, etc. units Magnetomotive force converter Magnetic field strength converter Magnetic flux converter Magnetic induction converter Radiation. Ionizing Radiation Absorbed Dose Rate Converter Radioactivity. Radioactive Decay Converter Radiation. Exposure Dose Converter Radiation. Absorbed Dose Converter Decimal Prefix Converter Data Transfer Typography and Image Processing Unit Converter Timber Volume Unit Converter Calculation of Molar Mass Periodic Table of Chemical Elements by D. I. Mendeleev

1 attojoule [aJ] = 0.006241506363094 kiloelectronvolt [keV]

Initial value

Converted value

joule gigajoule megajoule kilojoule millijoule microjoule nanojoule picojoule attojoule megaelectronvolt kiloelectronvolt electronvolt millielectronvolt microelectronvolt nanoelectronvolt picoelectronvolt erg gigawatt-hour megawatt-hour kilowatt-hour kilowatt-second watt-hour watt-second newton-meter horsepower-hour horsepower (metric.) -hour international kilocalorie thermochemical kilocalorie international calorie thermochemical calorie large (food) cal. brit. term. unit (IT) Brit. term. thermal unit mega BTU (IT) tonne-hour (refrigeration capacity) tonne oil equivalent barrel of oil equivalent (US) gigatonne megatonne TNT kilotonne TNT tonne TNT dyne-centimeter gram-force-meter gram-force-centimeter kilogram-force-centimeter kilogram -force-meter kilopond-meter pound-force-foot pound-force-inch ounce-force-inch ft-pound inch-pound inch-ounce pound-feet therm therm (UEC) therm (US) Hartree energy gigaton oil equivalent megaton equivalent oil equivalent of a kilobarrel of oil equivalent of a billion barrels of oil kilogram of trinitrotoluene Planck energy kilogram inverse meter hertz gigahertz terahertz kelvin atomic mass unit

More about energy

General information

Energy is a physical quantity of great importance in chemistry, physics, and biology. Without it, life on earth and movement are impossible. In physics, energy is a measure of the interaction of matter, as a result of which work is performed or there is a transition of one type of energy to another. In the SI system, energy is measured in joules. One joule is equal to the energy expended when moving a body one meter with a force of one newton.

Energy in physics

Kinetic and potential energy

Kinetic energy of a body of mass m moving at a speed v equal to the work done by the force to give the body speed v. Work is defined here as a measure of the action of a force that moves a body a distance s. In other words, it is the energy of a moving body. If the body is at rest, then the energy of such a body is called potential energy. This is the energy needed to keep the body in that state.

For example, when a tennis ball hits a racket in mid-flight, it stops for a moment. This is because the forces of repulsion and gravity cause the ball to freeze in the air. At this point, the ball has potential but no kinetic energy. When the ball bounces off the racket and flies away, on the contrary, it has kinetic energy. A moving body has both potential and kinetic energy, and one type of energy is converted into another. If, for example, a stone is tossed up, it will begin to slow down during the flight. As this deceleration progresses, kinetic energy is converted into potential energy. This transformation occurs until the supply of kinetic energy runs out. At this moment, the stone will stop and the potential energy will reach its maximum value. After that, it will begin to fall down with acceleration, and the energy conversion will occur in the reverse order. The kinetic energy will reach its maximum when the stone collides with the Earth.

The law of conservation of energy states that the total energy in a closed system is conserved. The energy of the stone in the previous example changes from one form to another, and therefore, despite the fact that the amount of potential and kinetic energy changes during the flight and fall, the total sum of these two energies remains constant.

Energy production

People have long learned to use energy to solve labor-intensive tasks with the help of technology. Potential and kinetic energy are used to do work, such as moving objects. For example, the energy of the flow of river water has long been used to produce flour in water mills. The more people use technology, such as cars and computers, in their daily lives, the greater the need for energy. Today, most of the energy is generated from non-renewable sources. That is, energy is obtained from fuel extracted from the bowels of the Earth, and it is quickly used, but not renewed with the same speed. Such fuels are, for example, coal, oil and uranium, which are used in nuclear power plants. In recent years, the governments of many countries, as well as many international organizations, such as the UN, consider it a priority to study the possibilities of obtaining renewable energy from inexhaustible sources using new technologies. Many scientific studies are aimed at obtaining these types of energy at the lowest cost. Currently, sources such as the sun, wind and waves are used to obtain renewable energy.

Energy for household and industrial use is usually converted into electricity using batteries and generators. The first power plants in history generated electricity by burning coal, or using the energy of water in rivers. Later, they learned to use oil, gas, sun and wind to generate energy. Some large enterprises maintain their power plants on the premises of the enterprise, but most of the energy is not produced where it will be used, but in power plants. Therefore, the main task of power engineers is to convert the produced energy into a form that makes it easy to deliver energy to the consumer. This is especially important when expensive or dangerous energy production technologies are used that require constant supervision by specialists, such as hydro and nuclear power. That is why electricity was chosen for domestic and industrial use, as it is easy to transmit with low losses over long distances through power lines.

Electricity is converted from mechanical, thermal and other types of energy. To do this, water, steam, heated gas or air set in motion turbines that rotate generators, where mechanical energy is converted into electrical energy. Steam is produced by heating water with heat generated by nuclear reactions or by burning fossil fuels. Fossil fuels are extracted from the bowels of the Earth. These are gas, oil, coal and other combustible materials formed underground. Since their number is limited, they are classified as non-renewable fuels. Renewable energy sources are solar, wind, biomass, ocean energy, and geothermal energy.

In remote areas where there are no power lines, or where power is cut off regularly due to economic or political problems, portable generators and solar panels are used. Fossil-fueled generators are especially common in both households and in organizations where electricity is absolutely necessary, such as hospitals. Typically, generators operate on piston engines, in which the energy of the fuel is converted into mechanical energy. Also popular are uninterruptible power devices with powerful batteries that charge when electricity is supplied and give energy during power outages.

Do you find it difficult to translate units of measurement from one language to another? Colleagues are ready to help you. Post a question to TCTerms and within a few minutes you will receive an answer.

Basic information

One electron volt is equal to the energy required to transfer an elementary charge in an electrostatic field between points with a potential difference of 1. Since the work during charge transfer q is equal to qU(where U- potential difference), and the elementary charge of particles, for example, an electron is −1.602 176 565(35) 10 −19 C, then:

In chemistry, the molar equivalent of an electron volt is often used. If one mole of electrons is transferred between points with a potential difference of 1 V, it gains (or loses) energy Q= 96485.3365(21) J, equal to the product of 1 eV by the Avogadro number. This value is numerically equal to Faraday's constant. Similarly, if during a chemical reaction in one mole of a substance, an energy of 96.5 kJ is released (or absorbed), then, accordingly, each molecule loses (or gains) about 1 eV.

The decay width Γ of elementary particles and other quantum-mechanical states, such as nuclear energy levels, is also measured in electronvolts. The decay width is the uncertainty of the energy of the state, related to the lifetime of the state τ by the uncertainty relation: Γ = ħ /τ ). A particle with a decay width of 1 eV has a lifetime of 6.582 119 28(15) 10 −16 s. Similarly, a quantum mechanical state with a lifetime of 1 s has a width 6.582 119 28(15) 10 −16 eV.

Multiples and submultiples

Derived units are commonly used in nuclear and high energy physics: kiloelectronvolts (keV, keV, 10 3 eV), megaelectronvolts (MeV, MeV, 10 6 eV), gigaelectronvolts (GeV, GeV, 10 9 eV) and tera electron volts (TeV, TeV , 10 12 eV). In cosmic ray physics, in addition, peta-electronvolts (PeV, PeV, 10 15 eV) and exa-electron volts (EeV, EeV, 10 18 eV) are used. In the band theory of solids, semiconductor physics and neutrino physics - millielectronvolts (meV, meV, 10 −3 eV).

Some values ​​of energies and masses in electronvolts

Notes

Links

• Online converter of electronvolt units to other number systems

Wikimedia Foundation. 2010 .

Atomic mass unit
Atomic mass unit

Atomic mass unit (a.e.m. or u) is a unit of mass equal to 1/12 of the mass of an atom of the carbon isotope 12 C, and is used in atomic and nuclear physics to express the masses of molecules, atoms, nuclei, protons and neutrons. 1 amu ( u) ≈ 1.66054 . 10 -27 kg. In nuclear physics and in elementary particle physics instead of mass m use in accordance with the Einstein relation E \u003d mc 2 its energy equivalent mc 2, and 1 electronvolt (eV) and its derivatives are used as a unit of energy: 1 kiloelectronvolt (keV) \u003d 10 3 eV, 1 megaelectronvolt (MeV) \u003d 10 6 eV , 1 gigaelectronvolt (GeV) = 10 9 eV, 1 tera electron volt (TeV) = 10 12 eV, etc. 1 eV is the energy acquired by a singly charged particle (for example, an electron or a proton) when passing a potential difference of 1 volt in an electric field. As is known, 1 eV = 1.6. 10 -12 erg = 1.6. 10 -19 J. In energy units
1 amu ( u)931.494 MeV. Proton (m p) and neutron (m n) masses in atomic mass units and in energy units are as follows: m p ≈ 1.0073 u≈ 938.272 MeV/ since 2, mn ≈ 1.0087 u≈ 939.565 MeV/s2. With an accuracy of ~1%, the proton and neutron masses are equal to one atomic mass unit (1 u).