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Hace 6 horas · Harry S. Truman (May 8, 1884 – December 26, 1972) was the 33rd president of the United States, serving from 1945 to 1953.A member of the Democratic Party, he previously served as a United States senator from Missouri from 1935 to 1945 and briefly as the 34th vice president in 1945 under Franklin D. Roosevelt.Assuming the presidency after Roosevelt's death, Truman implemented the Marshall ...
Hace 6 horas · Richard Phillips Feynman (/ ˈ f aɪ n m ə n /; May 11, 1918 – February 15, 1988) was an American theoretical physicist, known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, as well as his work in particle physics for which he proposed the parton model.
Hace 1 día · The word internetted was used as early as 1849, meaning interconnected or interwoven. The word Internet was used in 1945 by the United States War Department in a radio operator's manual, and in 1974 as the shorthand form of Internetwork. Today, the term Internet most commonly refers to the global system of interconnected computer networks, though it may also refer to any group of smaller networks.
Hace 6 horas · Geography and demographics. By the mid-19th century the United States had become a nation of two distinct regions. The free states in New England, the Northeast, and the Midwest had a rapidly growing economy based on family farms, industry, mining, commerce, and transportation, with a large and rapidly growing urban population. Their growth was fed by a high birth rate and large numbers of ...
