mud weight balance
41America's Next Top Model, Cycle 4 — Promotional photograph of the cast of Cycle 4 of America s Next Top Model Format Reality TV Created by Tyra Banks …
42tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
43Dinosaur — For other uses, see Dinosaur (disambiguation). Dinosaurs Temporal range: Late Triassic–Late Cretaceous, 231.4–65.5 Ma …
44History of the tank — This article is about the history of the tank.The prehistory of the tank [ thumb|right|Recreation of an armoured vehicle designed by Leonardo da Vinci at the Château d Amboise] The problem of advancing to attack while under fire is as old as… …
45Sediment Profile Imagery — (SPI) is an underwater technique for photographing the interface between the seabed and the overlying water. The technique is used to measure or estimate biological, chemical, and physical processes occurring in the first few centimetres of… …
46bird — birdless, adj. /berrd/, n. 1. any warm blooded vertebrate of the class Aves, having a body covered with feathers, forelimbs modified into wings, scaly legs, a beak, and no teeth, and bearing young in a hard shelled egg. 2. a fowl or game bird. 3 …
47Bird — /berrd/, n. Larry, born 1956, U.S. basketball player. * * * I Any of the warm blooded, beaked vertebrates of the class Aves, including more than 9,600 living species. A covering of feathers distinguishes birds from all other animals. Birds have a …
48Mountain bike — This article is about mountain bikes themselves. For the associated activity, see Mountain biking. A full suspension mountain bike A mountain bike or mountain bicycle (abbreviated MTB or ATB (all terrain bicycle)) is a bicycle created for off… …
49quicksand — quicksandy, adj. /kwik sand /, n. a bed of soft or loose sand saturated with water and having considerable depth, yielding under weight and therefore tending to suck down any object resting on its surface. [1275 1325; ME qwykkesand. See QUICK,… …
50Islamic arts — Visual, literary, and performing arts of the populations that adopted Islam from the 7th century. Islamic visual arts are decorative, colourful, and, in religious art, nonrepresentational; the characteristic Islamic decoration is the arabesque.… …
