Video: LEEJ TWG ceeb toom FDR cov neeg German tau tsim riam phom atomic thiab US xav tau ua ib yam?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Xya caum tsib xyoos dhau los, Hungarian- Neeg Asmeskas physicist Leo Szilard sau ib tsab ntawv rau Tebchaws Meskas Thawj Tswj Hwm Franklin Roosevelt qhia kev txhawj xeeb ntawd German cov kws tshawb fawb yuav sai sai no qhib cov secrets rau txhim kho thawj atomic foob pob.
Hais txog qhov no, LEEJ TWG ceeb toom Thawj Tswj Hwm Roosevelt txog cov neeg German ua haujlwm ntawm lub foob pob tshiab?
Lub yim hli ntuj 1939, Einstein tau sau ntawv rau US Thawj Tswj Hwm Franklin Roosevelt ceeb toom nws tias Nazis tau ua haujlwm ntawm riam phom tshiab thiab muaj zog: lub foob pob atomic. Phooj ywg physicist Leo Szilard yaum Einstein xa tsab ntawv thiab pab nws sau nws.
Einstein ceeb toom FDR txog dab tsi xyoo 1939? Roosevelt thaum Lub Yim Hli 2, 1939 . Sau los ntawm Szilárd hauv kev sab laj nrog phooj ywg Hungarian physicists Edward Teller thiab Eugene Wigner, tsab ntawv ceeb toom tias lub teb chaws Yelemees yuav tsim cov foob pob atomic thiab hais tias Tebchaws Meskas yuav tsum pib nws txoj haujlwm nuclear.
Raws li txoj cai, lub npe ntawm txoj haujlwm zais cia sab saum toj tau tso cai los ntawm Thawj Tswj Hwm Franklin Roosevelt los tsim lub foob pob atomic ua ntej cov neeg German?
Nws tau hais kom Tebchaws Meskas ua cov kauj ruam kom tau txais cov khoom khaws cia ntawm uranium ore thiab nrawm rau kev tshawb fawb ntawm Enrico Fermi thiab lwm tus rau hauv kev cuam tshuam cov saw hlau. Lawv tau kos npe los ntawm Albert Einstein thiab xa mus rau Thawj Tswj Hwm Franklin D . Roosevelt.
Leej twg qhia FD Roosevelt txog qhov muaj peev xwm ntawm riam phom fission?
Einstein tau sau rau qhia rau Roosevelt qhov kev tshawb fawb tsis ntev los no ntawm fission Cov kev sib txuas lus siv uranium ua rau nws muaj peev xwm ua tau ntau lub zog tuaj yeem tsim los ntawm cov tshuaj tiv thaiv kab mob thiab tias, los ntawm kev siv lub zog no, kev tsim kho ntawm "cov foob pob muaj zog heev" tau xav tau.
Pom zoo:
Thaum twg yog txoj kev xav ntawm cov neeg tiam neeg tau npaj tseg?
1668 Yog li ntawd, leej twg tau npaj txoj kev xav ntawm lub neej tiam neeg? Aristotle Ib sab saum toj no, txoj kev xav dab tsi tau hloov txoj kev xav ntawm lub neej tiam? Abiogenesis , txoj kev xav hais tias lub neej hloov zuj zus los ntawm nonliving chemical systems, hloov spontaneous tiam raws li tus thawj txoj kev xav rau lub keeb kwm ntawm lub neej .
Leej twg tsim cov pej xeem ecology txoj kev xav?
Hauv kev tshuaj xyuas cov pej xeem ntawm cov koom haum qhov teeb meem ntawm kev teeb tsa pej xeem ciam teb yuav tsum tau xav txog. Ib txoj hauv kev siv dav tshaj plaws raws li kev ua haujlwm ntawm Hannan thiab Freeman (1977)
Leej twg yog cov pioneers ntawm atomic txoj kev xav?
Lub atomic txoj kev xav thaum ub tau tawm tswv yim nyob rau hauv lub xyoo pua 5 BC los ntawm Greek philosophers Leucippus thiab Democritus thiab tau revived nyob rau hauv lub xyoo pua 1 BC los ntawm Roman philosopher thiab kws sau paj lug Lucretius
Leej twg tau pab txhawb hauv atomic txoj kev xav?
James Chadwick Pom cov neutrons hauv atoms. Koom nrog Rutherford hauv kev ua tiav qhov kev hloov pauv ntawm lwm lub teeb ci los ntawm kev foob pob nrog alpha hais thiab hauv kev tshawb fawb txog cov khoom thiab cov qauv ntawm atomic nuclei. Nws muaj ob tug ntxhais thiab nws nyiam ua vaj thiab nuv ntses
Leej twg yog leej niam leej txiv pab txhawb cytoplasmic qub txeeg qub teg?
Nyob rau hauv cov ntaub ntawv ntawm cytoplasmic qub txeeg qub tes, cov teebmeem ntawm niam txiv. Qhov no feem ntau yog vim muaj kev koom tes ntau dua ntawm cytoplasm rau zygote los ntawm niam txiv poj niam dua li txiv neej niam txiv. Feem ntau ovum txhawb ntau cytoplasm rau zygote dua cov phev