Energy

A plasma lamp, using electrical energy to create plasma light, heat, movement and a faint sound
In a typical lightning strike, 500 megajoules of electric potential energy is converted into the same amount of energy in other forms, mostly light energy, sound energy and thermal energy.
Thermal energy is energy of microscopic constituents of matter, which may include both kinetic and potential energy.
Thomas Young, the first person to use the term "energy" in the modern sense.
Joule's apparatus for measuring the mechanical equivalent of heat. A descending weight attached to a string causes a paddle immersed in water to rotate.
Basic overview of energy and human life.
A turbo generator transforms the energy of pressurized steam into electrical energy

Quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light.

- Energy
A plasma lamp, using electrical energy to create plasma light, heat, movement and a faint sound

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Energy transformation using Energy Systems Language

Energy transformation

Process of changing energy from one form to another.

Process of changing energy from one form to another.

Energy transformation using Energy Systems Language
Lamatalaventosa Wind Farm

In physics, energy is a quantity that provides the capacity to perform work (e.g. Lifting an object) or provides heat.

Visible light such as sunlight carries radiant energy, which is used in solar power generation.

Radiant energy

Visible light such as sunlight carries radiant energy, which is used in solar power generation.
Cherenkov radiation glowing in the core of a TRIGA reactor.

In physics, and in particular as measured by radiometry, radiant energy is the energy of electromagnetic and gravitational radiation.

Mass near the M87* black hole are converted into very energetic astrophysical jet, stretching five thousand light years

Mass–energy equivalence

Mass near the M87* black hole are converted into very energetic astrophysical jet, stretching five thousand light years
In the revised English edition of Isaac Newton's Opticks, published in 1717, Newton speculated on the equivalence of mass and light.
Photo of Albert Einstein in 1921
The equation in Albert Einstein's own handwriting from 1912

In physics, mass–energy equivalence is the relationship between mass and energy in a system's rest frame, where the two values differ only by a constant and the units of measurement.

Thermal radiation in visible light can be seen on this hot metalwork.

Thermal energy

Used loosely in various contexts in physics and engineering.

Used loosely in various contexts in physics and engineering.

Thermal radiation in visible light can be seen on this hot metalwork.

In thermodynamics, heat is energy transferred to or from a thermodynamic system by mechanisms other than thermodynamic work or transfer of matter.

Open System Model (basics)

Energy development

Open System Model (basics)
The Moss Landing Power Plant in California is a fossil-fuel power station that burns natural gas in a turbine to produce electricity
A (horizontal) drilling rig for natural gas in Texas
Fukushima Daiichi nuclear disaster
Low global public support for nuclear fission in the aftermath of Fukushima (Ipsos-survey, 2011)
The 22,500 MW Three Gorges Dam in China – the world's largest hydroelectric power station
Steam rising from the Nesjavellir Geothermal Power Station in Iceland
A spiral-type integrated compact fluorescent lamp, which has been popular among North American consumers since its introduction in the mid-1990s
An elevated section of the Alaska Pipeline
Electrical grid – pylons and cables distribute power
The Ffestiniog Power Station in Wales, United Kingdom. Pumped-storage hydroelectricity (PSH) is used for grid energy storage.
Energy generators past and present at Doel, Belgium: 17th-century windmill Scheldemolen and 20th-century Doel Nuclear Power Station
Energy consumption from 1989 to 1999
High-voltage lines for the long distance transportation of electrical energy
A grate for a wood fire
A steam turbine.
Solar (photovoltaic) panels at a military base in the US.
Wind turbines on Inner Mongolian grassland
Building of Pelton water turbines in Germany.

Energy development is the field of activities focused on obtaining sources of energy from natural resources.

The cars of a roller coaster reach their maximum kinetic energy when at the bottom of the path. When they start rising, the kinetic energy begins to be converted to gravitational potential energy. The sum of kinetic and potential energy in the system remains constant, ignoring losses to friction.

Kinetic energy

The first to publish the relation for kinetic energy . In relativistic mechanics, this is a good approximation only when v is much less than the speed of light.

The first to publish the relation for kinetic energy . In relativistic mechanics, this is a good approximation only when v is much less than the speed of light.

The cars of a roller coaster reach their maximum kinetic energy when at the bottom of the path. When they start rising, the kinetic energy begins to be converted to gravitational potential energy. The sum of kinetic and potential energy in the system remains constant, ignoring losses to friction.

Energy occurs in many forms, including chemical energy, thermal energy, electromagnetic radiation, gravitational energy, electric energy, elastic energy, nuclear energy, and rest energy.

Rainforest ecosystems are rich in biodiversity. This is the Gambia River in Senegal's Niokolo-Koba National Park.

Ecosystem

An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact.

An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact.

Rainforest ecosystems are rich in biodiversity. This is the Gambia River in Senegal's Niokolo-Koba National Park.
Flora of Baja California Desert, Cataviña region, Mexico
Global oceanic and terrestrial phototroph abundance, from September 1997 to August 2000. As an estimate of autotroph biomass, it is only a rough indicator of primary production potential and not an actual estimate of it.
Sequence of a decomposing pig carcass over time
Biological nitrogen cycling
Loch Lomond in Scotland forms a relatively isolated ecosystem. The fish community of this lake has remained stable over a long period until a number of introductions in the 1970s restructured its food web.
Spiny forest at Ifaty, Madagascar, featuring various Adansonia (baobab) species, Alluaudia procera (Madagascar ocotillo) and other vegetation
A hydrothermal vent is an ecosystem on the ocean floor. (The scale bar is 1 m.)
The High Peaks Wilderness Area in the 6000000 acre Adirondack Park is an example of a diverse ecosystem.
The Forest Landscape Integrity Index measures global anthropogenic modification on remaining forests annually. 0 = Most modification; 10= Least.

By feeding on plants and on one another, animals play an important role in the movement of matter and energy through the system.

Various examples of physical phenomena

Physics

Various examples of physical phenomena
Ancient Egyptian astronomy is evident in monuments like the ceiling of Senemut's tomb from the Eighteenth Dynasty of Egypt.
Ibn al-Haytham (c. 965–c. 1040), Book of Optics Book I, [6.85], [6.86]. Book II, [3.80] describes his camera obscura experiments.
The basic way a pinhole camera works
Galileo Galilei showed a modern appreciation for the proper relationship between mathematics, theoretical physics, and experimental physics.
Sir Isaac Newton (1643–1727), whose laws of motion and universal gravitation were major milestones in classical physics
Max Planck (1858–1947), the originator of the theory of quantum mechanics
Albert Einstein (1879–1955), whose work on the photoelectric effect and the theory of relativity led to a revolution in 20th century physics
The basic domains of physics
Solvay Conference of 1927, with prominent physicists such as Albert Einstein, Werner Heisenberg, Max Planck, Hendrik Lorentz, Niels Bohr, Marie Curie, Erwin Schrödinger and Paul Dirac
This parabola-shaped lava flow illustrates the application of mathematics in physics—in this case, Galileo's law of falling bodies.
Mathematics and ontology are used in physics. Physics is used in chemistry and cosmology.
The distinction between mathematics and physics is clear-cut, but not always obvious, especially in mathematical physics.
Classical physics implemented in an acoustic engineering model of sound reflecting from an acoustic diffuser
Archimedes' screw, a simple machine for lifting
Experiment using a laser
The astronaut and Earth are both in free fall.
Lightning is an electric current.
Physics involves modeling the natural world with theory, usually quantitative. Here, the path of a particle is modeled with the mathematics of calculus to explain its behavior: the purview of the branch of physics known as mechanics.
A simulated event in the CMS detector of the Large Hadron Collider, featuring a possible appearance of the Higgs boson.
Velocity-distribution data of a gas of rubidium atoms, confirming the discovery of a new phase of matter, the Bose–Einstein condensate
The deepest visible-light image of the universe, the Hubble Ultra-Deep Field
Feynman diagram signed by R. P. Feynman.
A typical phenomenon described by physics: a magnet levitating above a superconductor demonstrates the Meissner effect.

Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force.

Steam and liquid water are two different forms of the same chemical (pure) substance: water.

Chemical energy

Energy of chemical substances that is released when they undergo a chemical reaction and transform into other substances.

Energy of chemical substances that is released when they undergo a chemical reaction and transform into other substances.

Steam and liquid water are two different forms of the same chemical (pure) substance: water.

Breaking and making chemical bonds involves energy, which may be either absorbed by or evolved from a chemical system.

Possible 4-momenta of particles. One has zero invariant mass, the other is massive

Invariant mass

Portion of the total mass of an object or system of objects that is independent of the overall motion of the system.

Portion of the total mass of an object or system of objects that is independent of the overall motion of the system.

Possible 4-momenta of particles. One has zero invariant mass, the other is massive

More precisely, it is a characteristic of the system's total energy and momentum that is the same in all frames of reference related by Lorentz transformations.