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World Primary Energy Production by Source, 1970–2007
Year Coal Natural Gas1 Crude Oil2 Natural Gas Plant Liquids Nuclear Electric Power3 Hydroelectric Power3 Geothermal3 and Other4 1970 62.96 37.09 97.09 3.61 0.90 12.15 1.59 1975 66.20 45.67 113.08 4.…McMahon, Brien
(Encyclopedia) McMahon, Brien (James O'Brien McMahon), 1903–52, American statesman, b. Norwalk, Conn. After practicing law, he became a judge in Norwalk, and from 1933 to 1936 he served in the office…power, in physics
(Encyclopedia) power, in physics, time rate of doing work or of producing or expending energy. The unit of power based on the English units of measurement is the horsepower, devised for describing…Gibbs free energy
(Encyclopedia) Gibbs free energy: see free energy.prime mover
(Encyclopedia) prime mover: see energy, sources of.Lenz's law
(Encyclopedia) Lenz's law, physical law, discovered by the German scientist H. F. E. Lenz in 1834, that states that the electromotive force (emf) induced in a conductor moving perpendicular to a…photoelectric effect
(Encyclopedia) photoelectric effect, emission of electrons by substances, especially metals, when light falls on their surfaces. The effect was discovered by H. R. Hertz in 1887. The failure of the…International Atomic Energy Agency
(Encyclopedia) International Atomic Energy Agency: see Atomic Energy Agency, International.phosphorylation
(Encyclopedia) phosphorylation, chemical process in which a phosphate group is added to an organic molecule. In living cells phosphorylation is associated with respiration, which takes place in the…hydrophone
(Encyclopedia) hydrophonehydrophonehīˈdrəfōnˌ [key], device that receives underwater sound waves and converts them to electrical energy; the voltage generated can then be read on a meter or played…Trending
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