How many squares on a chessboard?
How many squares on a chessboard?Correct answers: 98
The first user who solved this task is Sanja Šabović.
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George B. KistiakowskyDied 7 Dec 1982 at age 82 (born 18 Nov 1900).George Bogdan Kistiakowsky was a Russian chemist who worked on developing the first atomic bomb but later advocated banning nuclear weapons. He immigrated to the U.S. in 1926, and taught chemistry at Princeton University then Harvard (1930-71). He served as special assistant to President Eisenhower for science and technology (1959-61). As head of the explosives division of the Los Alamos Laboratory during WW II (1944-46), he oversaw 600 people developing explosives for the first atom bomb. The conventional explosives are used for its detonation to uniformly compress the plutonium sphere and achieve critical mass. In 1977, he became chairman of the Council for a Livable World, which opposes nuclear war. |