Columbia Encyclopedia
Search results
500 results found
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...European Commission
(Encyclopedia)European Commission (EC), institution of the European Union (EU) invested with executive powers; it also is the main EU institution that initiates legislation. Located in Brussels, Belgium, it was fou...thermonuclear energy
(Encyclopedia)thermonuclear energy: see nuclear energy. ...gram-atomic weight
(Encyclopedia)gram-atomic weight, amount of an atomic substance whose weight, in grams, is numerically equal to the atomic weight of that substance. For example, 1 gram-atomic weight of atomic oxygen, O (atomic wei...Dawes Commission
(Encyclopedia)Dawes Commission, commission to the Five Civilized Tribes, created by the U.S. Congress in 1893 under the Dawes Act with H. L. Dawes as chairman. Its aim was the reorganization of the Indian Territory...energy, sources of
(Encyclopedia)energy, sources of, origins of the power used for transportation, for heat and light in dwelling and working areas, and for the manufacture of goods of all kinds, among other applications. The develop...Federal Trade Commission
(Encyclopedia)Federal Trade Commission (FTC), independent agency of the U.S. government established in 1915 and charged with keeping American business competition free and fair. The FTC has no jurisdiction over ban...Gibbs free energy
(Encyclopedia)Gibbs free energy: see free energy. ...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 of the U.S. A...Browse by Subject
- Earth and the Environment +-
- History +-
- Literature and the Arts +-
- Medicine +-
- People +-
- Philosophy and Religion +-
- Places +-
- Africa
- Asia
- Australia and Oceania
- Britain, Ireland, France, and the Low Countries
- Commonwealth of Independent States and the Baltic Nations
- Germany, Scandinavia, and Central Europe
- Latin America and the Caribbean
- Oceans, Continents, and Polar Regions
- Spain, Portugal, Italy, Greece, and the Balkans
- United States, Canada, and Greenland
- Plants and Animals +-
- Science and Technology +-
- Social Sciences and the Law +-
- Sports and Everyday Life +-
