Video: Yam khoom twg yuav raug tsim los ntawm Net?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yog li thaum lub net yog folded, nws tsim lub pyramid.
Xav txog qhov no, lub Net Shown yuav tsim dab tsi?
A net yog dab tsi 3D (peb-dimensional) zoo li yuav zoo li yog tias nws tau qhib tawm tiaj tus. Piv txwv li, ntawm no yog lub voos xwmfab: Yog tias lub voos xwmfab no tau ua los ntawm daim ntawv lossis daim npav, qhov no yog qhov nws yuav zoo li qhib tawm tiaj tus: Qhov no yog hu ua net o kub.
Tsis tas li ntawd, dab tsi 3d duab no ua? Daim vis dis aus no qhia txog kev tsim cov net rau ib daim duab plaub pyramid thiab daim duab peb sab prism los ntawm 3-d duab. Lub net ntawm ib qho khoom yog ib daim duab 2-dimensional uas tuaj yeem muab tais rau hauv cov khoom ntawd. Daim vis dis aus no yuav qhia cov nets ntawm lub voos xwmfab, lub tog raj kheej thiab lub khob hliav qab.
Yog li ntawd, dab tsi yog ib tug net ntawm ib tug ruaj khov daim duab?
Ib tug geometry net yog 2-dimensional puab uas tuaj yeem folded los ua 3-dimensional puab los yog a khov kho . Los yog a net yog ib tug qauv ua thaum nto ntawm ib tug peb-dimensional daim duab yog nteg tawm tiaj uas qhia txhua lub ntsej muag ntawm tus daim duab . A khov kho tej zaum yuav txawv nets.
Dab tsi yog cov khoom sib txawv?
Lawv yog: Rectangular prism - a daim duab uas muaj rau sab, hu ua ntsej muag, uas yog cov duab plaub. Kub - a daim duab uas muaj rau lub ntsej muag uas yog tag nrho cov squares ntawm tib qhov loj. Cone - ib daim duab uas muaj lub ntsej muag ncig ntawm ib kawg, hu ua lub hauv paus, thiab ib qho taw tes ntawm lwm qhov kawg qhov twg ob sab sib ntsib.
Pom zoo:
Yam khoom twg feem ntau txiav txim siab seb lub hnub qub loj lossis lub hnub qub supergiant yuav tsim?
Pawg (1) feem ntau txiav txim siab seb lub hnub qub loj lossis lub hnub qub supergiant yuav tsim. Cov hnub qub tsim nyob rau hauv cov cheeb tsam ntawm qhov ntom ntom hauv thaj tsam interstellar. Cov cheeb tsam no yog hu ua molecular huab thiab muaj feem ntau ntawm hydrogen. Helium, nrog rau lwm cov ntsiab lus, kuj pom nyob rau hauv cheeb tsam no
Yuav siv txoj hauv kev twg los txiav txim qhov purity ntawm txhua yam ntawm koj cov khoom uas tau rov qab los?
Cov txheej txheem tshuaj yooj yim tshaj plaws suav nrog gravimetry thiab titration. Kuj tseem muaj ntau txoj kev teeb pom kev zoo los yog spectroscopic, xws li UV-VIS spectroscopy, nuclear magnetic resonance thiab infrared spectroscopy. Cov txheej txheem chromatographic, xws li roj chromatography thiab kua chromatography, kuj tseem siv tau
Yuav ua li cas hom ntawm cov khoom raug txheeb xyuas los ntawm nws lub cev thiab tshuaj lom neeg lub zog?
Intensive zog, xws li ceev thiab xim, tsis nyob ntawm seb tus nqi ntawm cov khoom tam sim no. Lub cev lub cev tuaj yeem ntsuas yam tsis tau hloov cov khoom siv tshuaj lom neeg. Cov khoom siv tshuaj muaj peev xwm ntsuas tau los ntawm kev hloov cov tshuaj lom neeg tus kheej
Qhov kev sib npaug twg yog qhov tsim nyog los suav cov cua sov uas tsim los ntawm HCl NaOH cov tshuaj tiv thaiv?
Xam cov naj npawb ntawm moles ntawm lub hauv paus koj ntxiv los txiav txim siab molar tshav kub ntawm qhov nruab nrab, qhia siv qhov sib npaug Δ H = Q ÷ n, qhov twg 'n' yog tus naj npawb ntawm moles. Piv txwv li, xav tias koj ntxiv 25 mL ntawm 1.0 M NaOH rau koj HCl los ua kom muaj cua sov ntawm nruab nrab ntawm 447.78 Joules
Yuav ua li cas cov khoom siv caj ces hauv txhua lub xov tooj tshiab tsim los ntawm kev faib tawm ntawm tes sib piv nrog cov khoom siv caj ces hauv lub xov tooj qub?
Mitosis tshwm sim nyob rau hauv ob lub nuclei uas zoo tib yam rau thawj nucleus. Yog li, ob lub hlwb tshiab tsim tom qab kev faib tawm ntawm tes muaj tib yam khoom siv caj ces. Thaum lub sij hawm mitosis, chromosomes condense los ntawm chromatin. Thaum saib nrog lub microscope, chromosomes pom nyob rau hauv lub nucleus