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Vor 2 Tagen · Physicist Lise Meitner (left) at Bryn Mawr College in 1959. In 1938, after having fled to Sweden from Nazi Germany, she recognized and proved the physics of nuclear fission in response to puzzling experimental results from colleagues in Berlin. Despite her fundamental contributions, she was excluded from the 1944 Nobel Prize in Chemistry for ...
Vor einem Tag · The discovery of nuclear fission by Otto Hahn in December 1938 (and its theoretical explanation by Lise Meitner) generated intense interest among physicists. Bohr brought the news to the United States where he opened the Fifth Washington Conference on Theoretical Physics with Fermi on 26 January 1939. [83]
Vor 2 Tagen · Werner Karl Heisenberg ( pronounced [ˈvɛʁnɐ kaʁl ˈhaɪzn̩bɛʁk] ⓘ; 5 December 1901 – 1 February 1976) [2] was a German theoretical physicist, one of the main pioneers of the theory of quantum mechanics, and a principal scientist in the Nazi nuclear weapons program during World War II.
Vor einem Tag · In the summer of 1939, six months after the discovery of uranium fission, in December 1938 by chemists Otto Hahn and Fritz Strassmann and physicists Lise Meitner and Otto Robert Frisch, American newspapers and magazines openly discussed the prospect of atomic energy. However, no official U.S. atomic energy project existed.
Vor 3 Tagen · A month later, the almost totally unexpected discovery of nuclear fission by Hahn, Meitner, and Otto Frisch put an end to the possibility that Fermi had discovered element 93 because most of the unknown half-lives that had been observed by Fermi's team were rapidly identified as those of fission products.
- silvery metallic
- [237]
- 93
- a = 666.3b = 472.3c = 488.7
Vor einem Tag · Artificial intelligence needs ongoing and meaningful democratic oversight. Understanding the history of how the early nuclear weapons complex, novel biotechnology, and polygraph testing were managed can inform AI governance today. Scientific and technological innovations are made by people, and so they can be governed by people.
Vor 3 Tagen · What’s the Difference Between Fission & Fusion? Nuclear Reactions. A nuclear reaction is a process in which atoms collide with other atoms and lose some of their original mass. Because of the principle of energy conservation the lost mass must reappear as generated energy, according to Einstein's equation E = mc². The two types of ...
