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  1. Sep 6, 2017 · An atomic bomb, codenamed "Little Boy," was dropped over Hiroshima Japan on August 6, 1945. The bomb, which detonated with an energy of around 15 kilotons of TNT, was the first nuclear weapon ...

    • Missy Sullivan
    • 1 min
  2. Apr 18, 2024 · nuclear weapon, device designed to release energy in an explosive manner as a result of nuclear fission, nuclear fusion, or a combination of the two processes. Fission weapons are commonly referred to as atomic bombs. Fusion weapons are also referred to as thermonuclear bombs or, more commonly, hydrogen bombs; they are usually defined as ...

  3. Nuclear materials were processed in reactors located in Oak Ridge, Tennessee and Hanford, Washington. At its peak, the Manhattan Project employed 130,000 Americans at thirty-seven facilities across the country. On July 16, 1945 the first nuclear bomb was detonated in the early morning darkness at a military test-facility at Alamogordo, New Mexico.

  4. Contents. History of nuclear weapons. A nuclear fireball lights up the night in the United States' nuclear test Upshot-Knothole Badger on April 18, 1953. Building on major scientific breakthroughs made during the 1930s, the United Kingdom began the world's first nuclear weapons research project, codenamed Tube Alloys, in 1941, during World War II.

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  6. Apr 17, 2024 · Manhattan Project, U.S. government research project (1942–45) that produced the first atomic bombs. The project’s name was derived from its initial location at Columbia University, where much of the early research was done. The first bomb was exploded in a test at Alamogordo air base in southern New Mexico on July 16, 1945.

    • The Editors of Encyclopaedia Britannica
  7. At 5:29 a.m. (MST) on July 16, 1945, the world’s first atomic bomb detonated in the New Mexican desert, releasing a level of destructive power unknown in the existence of humanity. Emitting as much energy as 21,000 tons of TNT and creating a fireball that measured roughly 2,000 feet in diameter, the first successful test of an atomic bomb, known as the Trinity Test, forever changed the ...

  8. e. Nuclear weapons tests are experiments carried out to determine the performance, yield, and effects of nuclear weapons. Testing nuclear weapons offers practical information about how the weapons function, how detonations are affected by different conditions, and how personnel, structures, and equipment are affected when subjected to nuclear ...

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