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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...

Henry IV, king of France

(Encyclopedia)Henry IV, 1553–1610, king of France (1589–1610) and, as Henry III, of Navarre (1572–1610), son of Antoine de Bourbon and Jeanne d'Albret; first of the Bourbon kings of France. Henry's marri...

airship

(Encyclopedia)airship, an aircraft that consists of a cigar-shaped gas bag, or envelope, filled with a lighter-than-air gas to provide lift, a propulsion system, a steering mechanism, and a gondola accommodating pa...

democracy

(Encyclopedia)democracy [Gr.,=rule of the people], term originating in ancient Greece to designate a government where the people share in directing the activities of the state, as distinct from governments controll...

Prince Edward Island

(Encyclopedia)CE5 Prince Edward Island, province (2001 pop. 135,294), 2,184 sq mi (5,657 sq km), E Canada, off N.B. and N.S. The Mi'kmaq lived on the island before Europeans arrived. Jacques Cartier wrote ent...

progressive education

(Encyclopedia)progressive education, movement in American education. Confined to a period between the late 19th and mid-20th cent., the term “progressive education” is generally used to refer only to those educ...

Francis I, king of France

(Encyclopedia)Francis I, 1494–1547, king of France (1515–47), known as Francis of Angoulême before he succeeded his cousin and father-in-law, King Louis XII. The king also had some notable political achievem...

Huguenots

(Encyclopedia)Huguenots hyo͞oˈgənŏts [key], French Protestants, followers of John Calvin. The term is derived from the German Eidgenossen, meaning sworn companions or confederates. In the reign of King Louis ...

jet propulsion

(Encyclopedia)CE5 Types of jet engines: In the propeller-driven turbine a stream of high-velocity gases provides the power to drive the turbine and turn the propeller. In the jet-driven turbine the stream of gas...

balloon

(Encyclopedia)balloon, lighter-than-air craft without a propulsion system, lifted by inflation of one or more containers with a gas lighter than air or with heated air. During flight, altitude may be gained by disc...