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gas laws

(Encyclopedia)gas laws, physical laws describing the behavior of a gas under various conditions of pressure, volume, and temperature. Experimental results indicate that all real gases behave in approximately the sa...

Kepler's laws

(Encyclopedia)CE5 Schematic representation of Kepler's second law: The areas ABF and A′B′F′ are equal and are swept out in equal intervals of time by a planet orbiting around the sun (at F). Kepler's laws...

Chatham, William Pitt, 1st earl of

(Encyclopedia)Chatham, William Pitt, 1st earl of chătˈəm [key], 1708–78, British statesman, known as the Great Commoner. Proud, dramatic, and patriotic, Chatham excelled as a war minister and orator. He was th...

Austrian Succession, War of the

(Encyclopedia)Austrian Succession, War of the, 1740–48, general European war. In 1744 Frederick II, fearing the rising power of Austria, started the Second Silesian War by invading Bohemia; he was soon expell...

transfinite number

(Encyclopedia)transfinite number, cardinal or ordinal number designating the magnitude (power) or order of an infinite set; the theory of transfinite numbers was introduced by Georg Cantor in 1874. The cardinal num...

Anne, queen of England, Scotland, and Ireland

(Encyclopedia)Anne, 1665–1714, queen of England, Scotland, and Ireland (1702–7), later queen of Great Britain and Ireland (1707–14), daughter of James II and Anne Hyde; successor to William III. Queen Anne ...

orbit

(Encyclopedia)CE5 Important points in a planet's orbit as seen from the earth orbit, in astronomy, path in space described by a body revolving about a second body where the motion of the orbiting bodies is domi...

Marx, Karl

(Encyclopedia)Marx, Karl, 1818–83, German social philosopher, the chief theorist of modern socialism and communism. In 1847 Marx joined the Communist League and with Engels wrote for it the famous Communist M...

Icelandic literature

(Encyclopedia)Icelandic literature, the literature of Iceland. For the earliest literature of Iceland, see Old Norse literature. The 20th cent. saw the rise of a more introspective writing, influenced by Nietzsch...

mathematics

(Encyclopedia)mathematics, deductive study of numbers, geometry, and various abstract constructs, or structures; the latter often “abstract” the features common to several models derived from the empirical, or ...