Resultado de búsqueda
Hace 2 días · First practical means of collecting energy from the Sun and turning it into a current of electricity. 1955: The hovercraft is patented by Christopher Cockerell. 1955: The intermodal container is developed by Malcom McLean. 1957: The laser and optical amplifier are invented and named by Gordon Gould and Charles Townes.
Hace 3 días · QWERTY ( / ˈkwɜːrti / KWUR-tee) is a keyboard layout for Latin-script alphabets. The name comes from the order of the first six keys on the top letter row of the keyboard: Q W E R T Y. The QWERTY design is based on a layout included in the Sholes and Glidden typewriter sold via E. Remington and Sons from 1874.
Hace 4 días · U.S. President Harry Truman signing into law the Luce–Celler Act in 1946 [74] In 1945, the War Brides Act allowed foreign-born wives of U.S. citizens who had served in the U.S. Armed Forces to immigrate to the United States. In 1946, the War Brides Act was extended to include the fiancés of American soldiers.
Hace 3 días · Program of centennial festivities of Mexican independence in September 1910, asserting the historical continuity of Miguel Hidalgo, Benito Juárez "Law," and Porfirio Díaz, "Peace," from 1810 to 1910. The written history of Mexico spans more than three millennia. First populated more than 13,000 years ago, [1] central and southern Mexico ...
Hace 3 días · The rapid expansion of education past age 14 set the U.S. apart from Europe for much of the 20th century. [82] From 1910 to 1940, high schools grew in number and size, reaching out to a broader clientele. In 1910, for example, 9% of Americans had a high school diploma; in 1935, the rate was 40%. [190]
Hace 23 horas · The 1970s (pronounced "nineteen-seventies"; commonly shortened to the " Seventies " or the " '70s ") was a decade that began on January 1, 1970, and ended on December 31, 1979.
Hace 2 días · Nadir of Americanrace relations. The Jim Crow laws were state and local laws introduced in the Southern United States in the late 19th and early 20th centuries that enforced racial segregation, "Jim Crow" being a pejorative term for an African American. [1] Such laws remained in force until 1965. [2]
