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January: Niels Bohr and John A. Wheeler apply the liquid drop model developed by Bohr and Fritz Kalckar to explain the mechanism of nuclear fission. Bohr hypothesises that uranium-235 is largely responsible. [33] 3 September: Great Britain and France declare war on Nazi Germany in response to its invasion of Poland, beginning World War II in ...
1914 – H.G. Wells writes The World Set Free, a science fiction novel postulating a world war in 1956 pitting the United Kingdom and France against Germany and Austria-Hungary. Inspired by the research of Rutherford, Sir William Ramsay , and Frederick Soddy , the novel predicts the development of atomic weapons, and features a "carolinum ...
The "war on terror" that began with the September 11 attacks has been claimed by some to be World War III [106] or sometimes World War IV [100] [107] (assuming the Cold War was World War III). Others have disparaged such claims as "distorting American history". While there is general agreement amongst historians regarding the definitions and ...
It is a 100 cm (39 in) accelerator capable of achieving 3.2 MeV proton energies. [12] [13] On April 3, Yoshio Nishina, Tameichi Yasaki, and Sukeo Watanabe complete the first cyclotron in Japan and in Asia, at the Riken laboratory in Tokyo. It is a 26-inch accelerator capable of achieving 2.9 MeV deuteron energies. [14] [15] 1938
Threads is a 1984 British apocalyptic war drama television film jointly produced by the BBC, Nine Network and Western-World Television Inc. Written by Barry Hines and directed and produced by Mick Jackson, it is a dramatic account of nuclear war and its effects in Britain, specifically on the city of Sheffield in Northern England.
Mar. 16—The Manhattan Project in New Mexico was front and center in 1945. In nanoseconds, the bombing of Hiroshima and Nagasaki in Japan at the end of World War II changed the nature of warfare ...
The exercise simulated a Soviet conventional attack on European NATO forces 3 days before the start of the exercise (D-3), transitioning to a large scale chemical war (D-1) and on day 1 (D+1) of the exercise, NATO forces sought political guidance on the use of nuclear weapons to stem the Soviet advance which was approved by political leaders.
The Bohr model of the hydrogen atom. A negatively charged electron, confined to an atomic orbital, orbits a small, positively charged nucleus; a quantum jump between orbits is accompanied by an emitted or absorbed amount of electromagnetic radiation. The evolution of atomic models in the 20th century: Thomson, Rutherford, Bohr, Heisenberg ...