a former United States executive agency that was responsible for developing atomic bombs during World War II
code name for the secret United States project set up in 1942 to develop atomic bombs for use in World War II
The Manhattan Project was a research and development project that produced the first atomic bombs during World War II. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the US Army Corps of Engineers. The Army component of the project was designated the Manhattan District; "Manhattan" gradually superseded the official codename, "Development of Substitute Materials", for the entire project. Along the way, the project absorbed its earlier British counterpart, Tube Alloys. The Manhattan Project began modestly in 1939, but grew to employ more than 130,000 people and cost nearly US$2 billion. Over 90% of the cost was for building factories and producing the fissionable materials, with less than 10% for development and production of the weapons. Research and production took place at more than 30 sites across the United States, the United Kingdom and Canada. Two types of atomic bomb were developed during the war. A relatively simple gun-type fission weapon was made using uranium-235, an isotope that makes up only 0.7 percent of natural uranium. Since it is chemically identical to the most common isotope, uranium-238, and has almost the same mass, it proved difficult to separate. Three methods were employed for uranium enrichment: electromagnetic, gaseous and thermal. Most of this work was performed at Oak Ridge, Tennessee. In parallel with the work on uranium was an effort to produce plutonium. Reactors were constructed at Oak Ridge and Hanford, Washington, in which uranium was irradiated and transmuted into plutonium. The plutonium was then chemically separated from the uranium. The gun-type design proved impractical to use with plutonium so a more complex implosion-type weapon was developed in a concerted design and construction effort at the project's principal research and design laboratory in Los Alamos, New Mexico.
The numerical value of manhattan project in Chaldean Numerology is: 6
The numerical value of manhattan project in Pythagorean Numerology is: 8
Examples of manhattan project in a Sentence
Bipartisan, congressional approval for protecting and preserving Harriet Tubman's heroic life and work, Columbian mammoths and Ice Age fossils at Tule Springs, and the complexity of the Manhattan Project continue to make our National Park System our country's best idea.
Our national parks are a reflection of our nation, both past and present, and these seven new national park sites will further tell America's stories, bipartisan, congressional approval for protecting and preserving Harriet Tubman's heroic life and work, Columbian mammoths and Ice Age fossils at Tule Springs, and the complexity of the Manhattan Project continue to make our National Park System our country's best idea.
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"manhattan project." Definitions.net. STANDS4 LLC, 2019. Web. 23 Jan. 2019. <https://www.definitions.net/definition/manhattan+project>.