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81Mexican–American War — Mexican–American War …
82Tether propulsion — systems are proposals to use long, very strong cables (known as tethers) to change the velocity of spacecraft. The tethers may be used to initiate launch, complete launch, or alter the orbit of a spacecraft. Spaceflight using this form of… …
83Death Star — For other uses, see Death Star (disambiguation). The Death Star in A New Hope The Death Star is a fictional moon sized space station and superweapon appearing in the Star Wars movies and expanded universe. It is capable of destroying a planet… …
84Kinetic theory — [ temperature of an ideal monatomic gas is a measure related to the average kinetic energy of its atoms as they move. In this animation, the size of helium atoms relative to their spacing is shown to scale under 1950 atmospheres of pressure.… …
85Cataract — For other uses, see Cataract (disambiguation). Cataract Classification and external resources Magnified view of cataract in human eye, seen on examination with a slit lamp using diffuse illumination …
86Drag equation — In fluid dynamics, the drag equation is a practical formula used to calculate the force of drag experienced by an object due to movement through a fully enclosing fluid. The equation is attributed to Lord Rayleigh, who originally used L2 in place …
87Southern United States — The Southern United States mdash;commonly referred to as the American South, Dixie, or simply the South mdash;constitutes a large distinctive region in the southeastern and south central United States. Because of the region s unique cultural and… …
88Kitesurfing — Kitesurfing, kiteboarding, uses wind power to pull a rider through the water on a small surfboard or a kiteboard (which is like a wakeboard). Generally kiteboarding refers to a style of riding known as free style or wakestyle where as kitesurfing …
89Sheikh Mujibur Rahman — শেখ মুজিবুর রহমান President of Bangladesh …
90Bubblegum Crisis Tokyo 2040 — Official DVD collection of Bubblegum Crisis Tokyo 2040 バブルガムクライシス TOKYO 2040 (Baburugamu Kuraishisu TOKYO 2040) …
