fire-advance mechanism
51Lightning — This article is about the atmospheric electrical phenomenon. For other uses, see Lightning (disambiguation). See also: Lightning strike Lightning striking Atlanta, United States Lightning is an atmospheric electrostatic discharge (spar …
52plant — plantable, adj. plantless, adj. plantlike, adj. /plant, plahnt/, n. 1. any member of the kingdom Plantae, comprising multicellular organisms that typically produce their own food from inorganic matter by the process of photosynthesis and that… …
53Collapse of the World Trade Center — Coordinates: 40°42′41.12″N 74°00′44.00″W / …
54M1895 Colt-Browning machine gun — Colt Browning M1895/14 Machine Gun in 7mm Mauser caliber, possibly used in the Mexican Revolution. Type Machine gun …
55Battle of Fort Eben-Emael — Infobox Military Conflict conflict=Battle for Fort Eben Emael partof=World War II caption= date=10 May, 1940 – 11 May, 1940 place=Fort Eben Emael, near the city of Maastricht in the Netherlands result=Decisive German victory… …
56African military systems (1800-1900) — refers to the evolution of military systems on the African continent after 1800, with emphasis on the role of indigenous states and peoples within the African continent. Only major military systems or innovations and their development after 1800… …
57Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
58Trench warfare — is a form of warfare where both combatants have fortified positions and fighting lines are static. Trench warfare arose when a revolution in firepower was not matched by similar advances in mobility. The result was a slow and grueling form of… …
59Emergency management — Accident preparedness redirects here. For Safety related articles, see Safety. Disaster preparedness redirects here. For other articles related to disaster preparedness, see Category:Disaster preparedness. Emergency management is the generic name …
60Teller–Ulam design — The basics of the Teller–Ulam design. Radiation from a primary fission bomb compresses a secondary section containing both fission and fusion fuel. The compressed secondary is heated from within by a second fission explosion. The Teller–Ulam… …
