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activation energy
(Encyclopedia)CE5 Energy profile of an exothermic reaction: Although the total energy of the products is less than that of the reactants, the activation energy must be added to weaken or break existing bonds bef...kinetic energy
(Encyclopedia)kinetic energy: see energy.geothermal energy
(Encyclopedia)geothermal energy: see energy, sources of. ...free energy
(Encyclopedia)free energy or Gibbs free energy, quantity derived from the relationships between heat and work studied in thermodynamics and used as a measure of the relative stability of a physical or chemical syst...dark energy
(Encyclopedia)dark energy, repulsive force that opposes the self-attraction of matter (see gravitation) and causes the expansion of the universe to accelerate. The search for dark energy was triggered by the discov...atomic energy
(Encyclopedia)atomic energy: see nuclear energy. ...thermonuclear energy
(Encyclopedia)thermonuclear energy: see nuclear energy. ...local solar time
(Encyclopedia)local solar time: see solar time. ...mean solar time
(Encyclopedia)mean solar time: see solar time. ...apparent solar time
(Encyclopedia)apparent solar time: see solar time. ...Browse by Subject
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