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World War II [b] or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two major alliances: the Allies and the Axis powers. The vast majority of the world's countries, including all the great powers, fought as part of these military alliances. Many participating countries invested all available economic ...
The Ukrainian People's Army ( Ukrainian: Армія Української Народної Республіки ), also known as the Ukrainian National Army ( UNA) or by the derogatory term Petliurivtsi ( Ukrainian: Петлюрівці ), was the army of the Ukrainian People's Republic (1917–1921). They were often quickly reorganized units ...
The moment of inertia, otherwise known as the mass moment of inertia, angular/rotational mass, second moment of mass, or most accurately, rotational inertia, of a rigid body is a quantity that determines the torque needed for a desired angular acceleration about a rotational axis, akin to how mass determines the force needed for a desired acceleration.
Gray badge used for government accounts. X verification, formerly known as Twitter verification, is a system intended to communicate the authenticity of a Twitter account. [1] Since November 2022, Twitter users whose accounts are at least 90 days old and have a verified phone number receive verification upon subscribing to X Premium or Verified ...
The United States Navy ( USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the world's most powerful navy and the largest by tonnage, at 4.5 million tons in 2021 [9] and in 2009 an estimated battle fleet tonnage that exceeded the next 13 navies combined. [10]
For the Australian radio program, see Radio National. In philosophy, Occam's razor (also spelled Ockham's razor or Ocham's razor; Latin: novacula Occami) is the problem-solving principle that recommends searching for explanations constructed with the smallest possible set of elements. It is also known as the principle of parsimony or the law of ...
Dune (2021 film) Dune (titled onscreen as Dune: Part One) is a 2021 American epic science fiction film directed and co-produced by Denis Villeneuve, who co-wrote the screenplay with Jon Spaihts, and Eric Roth. It is the first of a two-part adaptation of the 1965 novel of the same name by Frank Herbert.
YouTube is an American online video sharing platform owned by Google. Accessible worldwide, [note 1] YouTube launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim, three former employees of PayPal. Headquartered in San Bruno, California, United States, it is the second most visited website in the world, after Google Search.