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3 days ago · Canonical commutation rule for position q and momentum p variables of a particle, 1927. pq − qp = h / (2 πi ). Uncertainty principle of Heisenberg, 1927. The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is a limit to the precision with which ...
1 day ago · The history of Africa begins with the emergence of hominids, archaic humans and — around 300,000–250,000 years ago — anatomically modern humans ( Homo sapiens ), in East Africa, and continues unbroken into the present as a patchwork of diverse and politically developing nation states. [1]
1 day ago · e. The Chinese Communist Revolution was a social and political revolution that culminated in the establishment of the People's Republic of China (PRC) in 1949. For the preceding century, China had faced escalating social, economic, and political problems as a result of Western imperialism, Japanese imperialism, and the decline of the Qing dynasty.
3 days ago · The Second Chechen War ( Russian: Втора́я чече́нская война́, [e] Chechen: ШолгIа оьрсийн-нохчийн тӀом, lit. 'Second Russian-Chechen War' [27]) took place in Chechnya and the border regions of the North Caucasus between the Russian Federation and the breakaway Chechen Republic of Ichkeria, from ...
3 days ago · Joseph Vissarionovich Stalin [f] (born Dzhugashvili; [g] 18 December [ O.S. 6 December] 1878 – 5 March 1953) was a Soviet politician and revolutionary who was the longest-serving leader of the Soviet Union from 1924 until his death in 1953. He held power as General Secretary of the Communist Party from 1922 to 1952, and Chairman of the ...
2 days ago · Anti-fascism is a political movement in opposition to fascist ideologies, groups and individuals. Beginning in European countries in the 1920s, it was at its most significant shortly before and during World War II, where the Axis powers were opposed by many countries forming the Allies of World War II and dozens of resistance movements worldwide.
3 days ago · Inter-war period The Australian Flying Corps remained part of the Australian Army until 1919, when it was disbanded along with the First Australian Imperial Force (AIF). Although the Central Flying School continued to operate at Point Cook, military flying virtually ceased until 1920, when the interim Australian Air Corps (AAC), with a wing ...
