Columbia Encyclopedia

Search results

500 results found

Hertz, Gustav

(Encyclopedia)Hertz, Gustav go͝osˈtäf hĕrts [key], 1887–1975, German physicist. He is noted for his work on the atom, and he shared with James Franck the 1925 Nobel Prize in Physics for research (1914) on the...

Haas, Arthur Erich

(Encyclopedia)Haas, Arthur Erich häs [key], 1884–1941, American physicist and educator, b. Bohemia. He was professor of physics at Vienna, Leipzig, London, and, from 1936, the Univ. of Notre Dame, South Bend, In...

water, desalination of

(Encyclopedia)water, desalination of, process of removing soluble salts from water to render it suitable for drinking, irrigation, or industrial uses. The principal methods used for desalination include distillatio...

catalyst

(Encyclopedia)catalyst, substance that can cause a change in the rate of a chemical reaction without itself being consumed in the reaction; the changing of the reaction rate by use of a catalyst is called catalysis...

respiration

(Encyclopedia)CE5 Respiratory system respiration, process by which an organism exchanges gases with its environment. The term now refers to the overall process by which oxygen is abstracted from air and is tran...

Black Tom

(Encyclopedia)Black Tom, part of Jersey City, N.J., also called Black Tom Island. In July, 1916, German saboteurs demolished U.S. munitions stores there; in Jan., 1917, they destroyed the Kingsland, N.J., munitions...

Delors, Jacques

(Encyclopedia)Delors, Jacques (Jacques Lucien Jean Delors) zhäk lo͞osyăNˈ zhäN dəlôrˈ [key] 1925–, French economist and politician and European statesman, president (1985–95) of the European Commission....

nuclear physics

(Encyclopedia)nuclear physics, study of the components, structure, and behavior of the nucleus of the atom. It is especially concerned with the nature of matter and with nuclear energy. ...

Ritz, Walter

(Encyclopedia)Ritz, Walter, 1878–1909, Swiss physicist. He taught at the universities of Zürich and Göttingen. Ritz's combination principle, confirmed by later research, stated that the frequencies of spectral ...

Shakti

(Encyclopedia)Shakti shŭkˈtē [key] [Skt.,=power], in Hinduism, name given to the female consorts of male deities. The Shakti personifies the dynamic, manifesting energy that creates the universe, while the male ...