2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Plutonium yog cov tshuaj siv hluav taws xob muaj hluav taws xob nrog lub cim Pu thiab tus lej atomic 94. Nws yog cov hlau actinide ntawm silvery-grey tsos uas tarnishes thaum raug huab cua, thiab ua ib tug dull txheej thaum oxidized. Lub caij ib txwm muaj rau allotropes thiab plaub lub xeev oxidation.
Thaum twg thiab qhov twg tau pom plutonium?
History. Plutonium tau tsim thawj zaug hauv Kaum Ob Hlis 1940 ntawm Berkeley, California, los ntawm Glenn Seaborg, Arthur Wahl, Joseph Kennedy, thiab Edwin McMillan. Lawv tsim nws los ntawm bombarding uranium-238 nrog deuterium nuclei (alpha hais).
Thaum twg plutonium siv thawj zaug?
Plutonium yog thawj zaug tsim thiab cais tawm hauv 1940 thiab tau siv los ua "Fat Man" atomic foob pob uas tau poob rau Nagasaki thaum kawg ntawm Tsov Rog Ntiaj Teb Zaum II, tsuas yog tsib. xyoo tom qab nws tau tsim thawj zaug, hais tias Amanda Simson, tus pab xibfwb ntawm chemical engineering ntawm University of New Haven.
Vim li cas plutonium khaws cia zais cia?
Kev tshawb pom ntawm plutonium tau zais cia kom txog thaum 1946 vim yog Tsov Rog Ntiaj Teb Zaum II. Qhov twg plutonium tau txais nws lub npe? Nws tau muaj npe tom qab lub ntiaj teb dwarf Pluto (uas tau suav tias yog lub ntiaj teb tag nrho thaum lub sijhawm). Qhov no ua raws li kev lig kev cai pib thaum uranium tau muab npe tom qab lub ntiaj teb Uranus.
Plutonium thawj zaug ua li cas?
Plutonium yog thawj zaug tsim thiab cais tawm thaum xyoo 1940 thiab thaum ntxov 1941, los ntawm a deuteron bombardment ntawm uranium-238hauv 1.5-meter (60 in) cyclotron ntawm University of California, Berkeley.
Pom zoo:
Thaum pom zoo ntawm daim nqi tus neeg pom zoo debit?
A tus neeg uas pom zoo daim nqi no hu ua endorser thiab tus neeg uas daim nqi pom zoo yuav raug hu ua tus pom zoo. Logic: B yog tus neeg tshuav nuj nqi ntawm A. Yog li, A txo nws txoj kev lav phib xaub hloov nws B / R. Yog li, B account yuav debit vim txo tus nqi qiv nyiaj.
Qhov twg yog qhov pom ib txwm pom thaum percussing thaj tsam plab?
Lub plab plab uas muaj roj ntau ib txwm muaj a tympanitic tympanitic Meteorism. Tshwj xeeb. Gastroenterology. Tympanite yog ib yam mob uas muaj roj ntau ntau hauv plab hnyuv thiab ua rau mob plab. Lo lus yog los ntawm Greek τύμπανο, "nruas"
Thaum twg cov ntaub ntawv pom pom tau tsim?
In 1644, Michael Florent Van Langren, tus kws tshawb fawb Flemish, ntseeg tias tau muab thawj qhov pom kev sawv cev ntawm cov ntaub ntawv txheeb cais. Leej twg invented data visualization? Lub xyoo 1960 thiab 1970 tau pom qhov tshwm sim ntawm cov kws tshawb fawb xws li John W.
Thaum twg yog txij nkawm thaum xub pom ob niam txiv cam on?
Spinoff series, ua tiav los ntawm cov khub niam txiv, yuav nthuav tawm nws lub caij thib peb Lub Rau Hli 2 thaum 8 teev tsaus ntuj EST (5 p.m. PDT) ntawm Lub Neej. Koj tuaj yeem saib cov yeeb yam ntawm FuboTV, Philo thiab Sling. Yuav ua li cas thaum xub pom ob niam txiv Cam tau them?
Thaum twg Mendel qhov kev tshawb pom pom?
Mendel thawj zaug nthuav tawm nws cov txiaj ntsig hauv ob qhov kev qhuab qhia cais hauv 1865rau Natural Science Society hauv Brünn. Nws daim ntawv "Kev sim ntawm tsob nroj Hybrids" tau luam tawm nyob rau hauv lub zej zog cov phau ntawv journal, Verhandlungen des naturforschenden Vereines hauv Brünn, xyoo tom ntej.
