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81History of submarines — The history of submarines covers the historical chronology and facts related to submarines , manned autonomous boats that operate underwater. It includes the history of submersibles , which were designed primarily to operate on the surface, and… …
82List of elementary physics formulae — A list of elementary physics formulae commonly appearing in high school and college introductory physics courses. The list consists primarily of formulas concerning mechanics, showing relations between matter, energy, motion, and force in… …
83Elementary physics formulae — A list of elementary physics formulae commonly appearing in high school and college introductory physics courses. The list consists primarily of formulas concerning mechanics, showing relations between matter, energy, motion, and force in… …
84Point bar — A point bar is a depositional feature of streams. Point bars are found in abundance in mature or meandering streams. They are crescent shaped and located on the inside of a stream bend. Point bars are composed of sediment that is well sorted and… …
85Moons of Haumea — Keck image of Haumea and its moons. Hiʻiaka is above Haumea (center), and Namaka is directly below. The outer Solar System dwarf planet Haumea has two known moons, Hiʻiaka and Namaka, named after Hawaiian goddesses. These small moons were… …
86Inertial navigation system — An Inertial Navigation System (INS) is a navigation aid that uses a computer and motion sensors to continuously track the position, orientation, and velocity (direction and speed of movement) of a vehicle without the need for external references …
87Dye laser — Close up of a table top dye laser based on Rhodamine 6G, emitting at 580 nm (yellow orange). The emitted laser beam is visible as faint yellow lines. The orange dye solution enters the laser from the left, and is pumped by a 514 nm (blue green)… …
88cyclotron — /suy kleuh tron , sik leuh /, n. Physics. an accelerator in which particles are propelled in spiral paths by the use of a constant magnetic field. [1930 35; CYCLO + TRON] * * * Particle accelerator that accelerates charged atomic or subatomic… …
89electromagnet — /i lek troh mag nit/, n. a device consisting of an iron or steel core that is magnetized by electric current in a coil that surrounds it. [1815 25; ELECTRO + MAGNET] * * * Device consisting of a core of magnetic material such as iron, surrounded… …
90moon — mooner, n. moonless, adj. /moohn/, n. 1. the earth s natural satellite, orbiting the earth at a mean distance of 238,857 miles (384,393 km) and having a diameter of 2160 miles (3476 km). 2. this body during a particular lunar month, or during a… …
