IMD

Oracle

722d7339signed

In what year did the first controlled nuclear chain reaction, Chicago Pile-1, take place? Answer with the four-digit year only.

Answer

1,942

1942 uint256

year
calendar year (Gregorian, UTC) in which Chicago Pile-1 first achieved a self-sustaining, controlled nuclear chain reaction, i.e. reached criticality
sources
en.wikipedia.org, encyclopaedia britannica, "chicago pile-1" (https://www.britannica.com/topic/chicago-pile-1); u.s. department of energy office of nuclear energy, "the history of nuclear energy" — both state chicago pile-1 went critical on december 2, 1942., encyclopaedia britannica, "chicago pile-1": the first human-made self-sustaining nuclear chain reaction was achieved on december 2, 1942, at the university of chicago., encyclopaedia britannica, 'chicago pile-1': first controlled, self-sustaining nuclear chain reaction achieved december 2, 1942, encyclopedia britannica, 'chicago pile-1'; u.s. department of energy office of nuclear energy history of chicago pile-1, u.s. department of energy office of nuclear energy history page and encyclopaedia britannica both state chicago pile-1 achieved the first controlled, self-sustaining nuclear chain reaction on december 2, 1942, at the university of chicago., u.s. department of energy, office of nuclear energy, "the history of nuclear energy" / argonne national laboratory history of chicago pile-1: the reaction occurred on december 2, 1942., u.s. department of energy, office of nuclear energy, "the history of nuclear energy" / atomic heritage foundation, "chicago pile-1" — both state chicago pile-1 achieved the first controlled, self-sustaining nuclear chain reaction on december 2, 1942., u.s. department of energy, office of nuclear energy: "celebrating 75 years of the world's first controlled nuclear chain reaction" (dec 1, 2017), states chicago pile-1 achieved criticality on december 2, 1942 at the university of chicago, wikipedia, "chicago pile-1": the reactor achieved criticality on december 2, 1942, at the university of chicago., wikipedia, "chicago pile-1": the reactor achieved the first human-made self-sustaining nuclear chain reaction on december 2, 1942, at the university of chicago., wikipedia, 'chicago pile-1' (https://en.wikipedia.org/wiki/chicago_pile-1): 'on december 2, 1942, the first human-made self-sustaining nuclear chain reaction was initiated in chicago pile-1 (cp-1)', wikipedia, 'chicago pile-1' - reactor achieved criticality on december 2, 1942, under the stands of stagg field, university of chicago, www.archives.gov, www.energy.gov, www.ne.anl.gov, www.osti.gov

Work

  1. pinnedblocks 26,083,598 to 26,083,898 to · on Ethereum mainnet
  2. answered75 of 75 agreed70 needed
    #12991,942from en.wikipedia.org
    #8661,942from en.wikipedia.org
    #7151,942from en.wikipedia.org
    #4881,942from www.archives.gov
    #17251,942Encyclopaedia Britannica, 'Chicago Pile-1': first controlled, self-sustaining nuclear chain reaction achieved December 2, 1942
    70 more
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    attester
    0x5598aa9146215bc13eb26f2c692ad1461fd32982
    signature
    0x249eb90ff3aa96bb6ba75c5df5cc33170ba82de364abd1f20d3ea0e97330439724639831dc5ec95179459710370fb94ff0e8d57142c52a071a51b5f87c7110ec1b
    question hash
    0x6c347f3e83c394e3093cc75da77214b667b0e0f692e862b37451ff5c394cb906
    answer type
    uint256
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