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  2. Elementary algebra - Wikipedia

    en.wikipedia.org/wiki/Elementary_algebra

    Unlike abstract algebra, elementary algebra is not concerned with algebraic structures outside the realm of real and complex numbers. It is typically taught to secondary school students and at introductory college level in the United States, [5] and builds on their understanding of arithmetic. The use of variables to denote quantities allows ...

  3. Assisted take-off - Wikipedia

    en.wikipedia.org/wiki/Assisted_take-off

    F/A-18 attached to steam catapult preparatory to launch. A well-known type of assisted takeoff is an aircraft catapult. In modern systems fitted on aircraft carriers, a piston, known as a shuttle, is propelled down a long cylinder under steam pressure. The aircraft is attached to the shuttle using a tow bar or launch bar mounted to the nose ...

  4. Catapult - Wikipedia

    en.wikipedia.org/wiki/Catapult

    Basic diagram of an onager, a type of catapult. A catapult is a ballistic device used to launch a projectile a great distance without the aid of gunpowder or other propellants – particularly various types of ancient and medieval siege engines. [1] A catapult uses the sudden release of stored potential energy to propel its payload.

  5. National Catapult Contest - Wikipedia

    en.wikipedia.org/wiki/National_catapult_contest

    The National Catapult Contest originated out of a simple directive from the Academic Development Committee of Indianapolis' Park School for Boys (now Park Tudor School) in December 1965, which "urged the faculty to review continuously the content and method of their instruction," and "further, not to forego unusual methods of stimulating the interest and involvement of students."

  6. Rocket sled launch - Wikipedia

    en.wikipedia.org/wiki/Rocket_sled_launch

    A rocket sled launch, also known as ground-based launch assist, catapult launch assist, and sky-ramp launch, is a proposed method for launching space vehicles. With this concept the launch vehicle is supported by an eastward pointing rail or maglev track that goes up the side of a mountain while an externally applied force is used to accelerate ...

  7. Crossbows and Catapults - Wikipedia

    en.wikipedia.org/wiki/Crossbows_and_Catapults

    Crossbows and Catapults, also known as Battlegrounds, is a game of physical skill first released in 1983.It has since been published by several different game publishers including Lakeside, Alga (), Base Toys, Tomy and currently Moose Toys (under the name Battlegrounds Crossbows and Catapults).

  8. Fighter catapult ship - Wikipedia

    en.wikipedia.org/wiki/Fighter_catapult_ship

    Former ocean boarding vessel, converted to a catapult ship in 1940, war service in the Atlantic [2] after being damaged repaired in 1943 and returned to merchant use. Maplin: 1940 Former ocean boarding vessel. Maplin saw war service in the Atlantic in 1940. She was a training ship from 1941 to 1944, in reserve from September 1944 and ...

  9. Type 076 landing helicopter dock - Wikipedia

    en.wikipedia.org/wiki/Type_076_landing...

    Electromagnetic catapult The Type 076 landing helicopter dock ( NATO reporting name : Yulan-class landing helicopter assault [ 7 ] ) is a class of drone-carrying amphibious assault ship for the Chinese People's Liberation Army Navy (PLAN). [ 8 ]