bottom-hole rotation device
11Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
12gasoline engine — Most widely used form of internal combustion engine, found in most automobiles and many other vehicles. Gasoline engines vary significantly in size, weight per unit of power generated, and arrangement of components. The principal type is the… …
13Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
14fluid mechanics — an applied science dealing with the basic principles of gaseous and liquid matter. Cf. fluid dynamics. [1940 45] * * * Study of the effects of forces and energy on liquids and gases. One branch of the field, hydrostatics, deals with fluids at… …
15Perpetual motion — For other uses, see Perpetual motion (disambiguation). Robert Fludd s 1618 water screw perpetual motion machine from a 1660 wood engraving. This device is widely credited as the first recorded attempt to describe such a device in order to produce …
16Antarctica — /ant ahrk ti keuh, ahr ti /, n. the continent surrounding the South Pole: almost entirely covered by an ice sheet. ab. 5,000,000 sq. mi. (12,950,000 sq. km). Also called Antarctic Continent. * * * Antarctica Introduction Antarctica Background:… …
17undersea exploration — Introduction the investigation and description of the ocean waters and the seafloor and of the Earth beneath. Primary objectives and accomplishments Included in the scope of undersea exploration are the physical and chemical… …
18Pinball — covered case called a pinball machine. The primary objective of the game is to score as many points as possible. Secondary objectives are to maximize the time spent playing (by earning extra balls and keeping the ball in play as long as possible) …
19Planet killer — In science fiction, a planet killer (or some variation on that meaning) is a object capable of destroying an entire planet or render it uninhabitable. [ [http://www.stardestroyer.net/Empire/Essays/Planet Killers.html stardestroyer.net: Planet… …
20Glossary of cricket terms — Cricket is a team sport played between two teams of eleven. It is known for its rich terminology.[1][2][3] Some terms are often thought to be arcane and humorous by those not familiar with the game.[4] This is a general glossary of the… …
