Which caused the us army to take over atomic research in the early 1940s?
a) the first atomic bomb test
b) a letter from albert einstein
c) japan’s research into atomic bombs
d) the us entry into world war ii

Your best answer would be "D"

The US entry into World War IIcaused the US Army to take over atomic research in early 1940s.

Further Explanations:

United States took over to the atomic research during the Second World War so s to foster the development of atomic science and technology. AEC or United Staes Atomic Energy Commission was a governmental agency of the United States established to control the development of technology and atomic science. The research was initiated not only form nuclear weapons for the nation's defense but also for the improvement of public welfare and its strengthening in private enterprises.

The project started somewhat during 1939 through the initiation of the Manhattan Project. Manhattan Project was a research project of the Second World War that gave the world its first nuclear weapon. It was a joint project of the United States, Britain, and Canada under the administration of Major General Leslie Groves, engineer of US Army corps. Robert Oppenheimer a Nuclear Physicist was appointed as the director of Los Alamos Laboratory, where the bomb was assembled.two types of nuclear bombs were made during the war namely complex implosion-type atomic weapons and a gun-type fission weapon.

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Answer Details

Grade – High School

Subject – Economy

Chapter – Manhattan Project

Keywords:

United States, Second World War, Atomic Energy Commission, United States, technology and atomic science, Manhattan Project, Leslie Groves, Robert Oppenheimer, Los Alamos Laboratory

answer; i believe the correct answer is (the willamete valley);