General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

Tacan

Science; General science

A member of the rho-theta family of air navigation systems which define an aircraft's position by its distance and bearing to a single beacon. Such systems inherently answer the navigator's ...

A metal-forming process whereby molten metal is poured into a cavity or mould and, when cooled, solidifies and takes on the characteristic shape of the mold. Casting offers several advantages over ...

Gadolinium

Science; General science

A metallic chemical element, Gd, atomic number 64 and atomic weight 157.25, belonging to the rare-earth group. The naturally occurring element is composed of eight isotopes. It is named in honour of ...

Magnesium

Science; General science

A metallic chemical element, Mg, in group 2 of the periodic system, atomic number 12, atomic weight 24.312. Magnesium is silvery white and extremely light in weight. The specific gravity is 1.74, and ...

Neodymium

Science; General science

A metallic chemical element, Nd, atomic number 60, atomic weight 144.24. Neodymium belongs to the rare-earth group of elements. The naturally occurring element includes six isotopes. The oxide, Nd 2 ...

Alloy

Science; General science

A metal product containing two or more elements as a solid solution, as an intermetallic compound, or as a mixture of metallic phases. This article will describe alloys on the basis of their ...

Manganese

Science; General science

A metallic element, Mn, atomic number 25, and atomic weight 54.9380 g/mole. Manganese is one of the transition elements of the first long period of the periodic table, falling between chromium and ...