(Encyclopedia) helicopter, type of aircraft in which lift is obtained by means of one or more power-driven horizontal propellers called rotors. When the rotor of a helicopter turns it produces…
(Encyclopedia) Abu Dhabi Abu Dhabi äˈb&oomacr; ᵺäˈbē, zä–, dä– [key], Arab. Abu Zabi, sheikhdom, c.26,000 sq mi (67,300 sq km), part of the federation of seven…
(Encyclopedia) snorkel, tube through which a submarine or diver can draw air while underwater. When in use, the top of the snorkel tube extends above the water surface into the air. The first…
(Encyclopedia) British Library, national library of Great Britain, located in London; one of the world's great libraries. Long a part of the British Museum, the library collection originated in 1753…
(Encyclopedia) perspective, in art, any method employed to represent three-dimensional space on a flat surface or in relief sculpture. Although many periods in art showed some progressive diminution…
(Encyclopedia) PeruginoPeruginopār&oomacr;jēˈnō [key], c.1445–1523?, Umbrian painter, b. near Perugia. His real name was Pietro di Cristoforo Vannucci. Perugino is, after Raphael, the greatest…
(Encyclopedia) Catherine of Siena, SaintCatherine of Siena, Saintsēĕnˈə [key], 1347–80, Italian mystic and diplomat, a member of the third order of the Dominicans, Doctor of the Church. The daughter…
Carole KingArchive PhotosRecord of the Year“It's Too Late,” Carole KingAlbum of the YearTapestry, Carole King (Ode)Song of the Year“You've Got a Friend,” Carole King, songwriterBest New Artist of…
Maintaining a Balance
Algebra
Solving Basic Equations Maintaining a Balance Equations with Multiple Steps Absolute Value Equations Equations with Multiple Variables
In case you haven't seen…
(Encyclopedia) MilanMilanmĭlănˈ, –änˈ [key], Ital. Milano, Lat. Mediolanum, city (1991 pop. 1,369,231), capital of Lombardy and of Milan prov., N Italy, at the heart of the Po basin. Because of its…
