#energy  (physics) the capacity of a physical system to do work; the units of energy are joules or ergs; "energy can take a wide variety of forms"
  supertype:  #physical_phenomenon  a natural phenomenon involving the physics of matter and energy
  subtype:  #activation_energy  the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur
  subtype:  #alternative_energy__alternativeenergy  energy derived from sources that do not use up natural resources or harm the environment
     subtype:  #solar_energy__solarenergy__solar_power__solarpower  energy from the sun that is converted into thermal or electrical energy; "the amount of energy falling on the earth is given by the solar constant, but very little use has been made of solar energy"
     subtype:  #wind_generation__wind_power  power derived from the wind (as by windmills)
  subtype:  #atomic_energy__nuclear_energy__nuclearenergy  the energy released by a nuclear reaction
     subtype:  #atomic_power__nuclear_power__nuclearpower  nuclear energy regarded as a source of electricity for the power grid (for civilian use)
  subtype:  #binding_energy__bindingenergy__separation_energy  the energy required to separate particles from a molecule or atom or nucleus; equals the mass defect
  subtype:  #chemical_energy__chemicalenergy  that part of the energy in a substance that can be released by a chemical reaction
  subtype:  #electrical_energy__electricity  energy made available by the flow of electric charge through a conductor; "they built a car that runs on electricity"
     subtype:  #alternating_current__alternatingcurrent__AC  an electric current that reverses direction sinusoidally; "In the US most household current is AC at 60 cycles per second"
     subtype:  #direct_current__DC  an electric current that flows in one direction steadily
     subtype:  #signal.electrical_energy  an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
  subtype:  #energy_level__energy_state  a definite stable energy that a physical system can have; used especially of the state of electrons in atoms or molecules; "according to quantum theory only certain energy levels are possible"
  subtype:  #rest_energy  the energy equivalent to the mass of a particle at rest in an inertial frame of reference; equal to the rest mass times the square of the speed of light
  subtype:  #work.energy  (physics) a manifestation of energy; the transfer of energy from one physical system to another expressed as the product of a force and the distance through which it moves a body in the direction of that force; "work equals force times distance"
  subtype:  #heat_energy__heat  a form of energy that is transferred by a difference in temperature
     subtype:  #heat_of_dissociation  the heat required for a fluid substance to break up into simpler constituents
     subtype:  #heat_of_formation  the heat evolved or absorbed during the formation of one mole of a substance from its component elements
     subtype:  #heat_of_solution  the heat evolved or absorbed when one mole of a substance is dissolved in a large volume of a solvent
     subtype:  #latent_heat__heat_of_transformation  heat absorbed or radiated during a change of phase at a constant temperature and pressure
        subtype:  #heat_of_condensation  heat liberated by a unit mass of gas at its boiling point as it condenses into a liquid; "the heat of condensation is equal to the heat of vaporization"
        subtype:  #heat_of_fusion  heat absorbed by a unit mass of a solid at its melting point in order to convert the solid into a liquid at the same temperature; "the heat of fusion is equal to the heat of solidification"
        subtype:  #heat_of_solidification  heat liberated by a unit mass of liquid at its freezing point when it solidifies
        subtype:  #heat_of_sublimation  heat absorbed by a unit mass of material when it changes from a solid to a gaseous state
        subtype:  #heat_of_vaporization__heat_of_vaporisation  heat absorbed by a unit mass of a material at its boiling point in order to convert the material into a gas at the same temperature
     subtype:  #specific_heat  the heat required to raise the temperature of one gram of a substance one degree centigrade
  subtype:  #mechanical_energy  energy in a mechanical form
     subtype:  #kinetic_energy__kineticenergy__K.E.  the mechanical energy that a body has by virtue of its motion
     subtype:  #potential_energy__potentialenergy__P.E.  the mechanical energy that a body has by virtue of its position; stored energy
        subtype:  #elastic_energy__elasticenergy__elastic_potential_energy__elasticpotentialenergy  potential energy that is stored when a body is deformed (as in a coiled spring)
  subtype:  #radiant_energy__radiantenergy  energy that is transmitted in the form of (electromagnetic) radiation; energy that exists in the absence of matter
     subtype:  #luminous_energy  the energy associated with visible light

1 statement is about an indirect instance of #energy (#work.energy): pm#graph1_on_work.energy
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