Video: Dab tsi ntawm fusion tshwm sim hauv Nova?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib qho qub qub nova , ntawm qhov tod tes, tshwm sim thaum tus ntsias dawb - cov seem ntawm lub hnub zoo li lub hnub qub - absorbs cov khoom siv ntau dhau los ntawm tus khub binary. Qhov no qiv hydrogen undergoes kev fusion , uas ua rau nws ci ntsa iab ntau, tso tawm mus txog 100, 000 lub zog ntau dua rau hauv qhov chaw.
Ib yam li ntawd, yuav ua li cas thaum Nova theem dhau lawm?
Nws tshwm sim thaum lub hnub qub loj tau tso nws cov khoom ntawm fusion thiab tsis tuaj yeem txhawb nqa nws tus kheej lub ntiajteb txawj nqus. Nws tawg thiab ua rau tawg loj heev. Dab tsi tom qab ntawd yog lub hnub qub qub - lub hnub qub neutron, lub qhov dub, lossis lub ntsej muag dawb. Peb lub hnub feem ntau yuav dhau los ua neeg dawb huv thaum kawg ntawm nws lub neej.
Ib tug kuj yuav nug, dab tsi cov ntsiab lus tsim nyob rau hauv supernova? Cov ntsiab lus tsim nyob rau hauv cov theem no yog los ntawm oxygen dhau mus hlau . Thaum lub sijhawm supernova, lub hnub qub tso tawm ntau lub zog nrog rau cov neutrons, uas tso cai rau cov ntsiab lus hnyav dua. hlau , zoo li uranium thiab kub , yuav tsum tau ua. Nyob rau hauv lub supernova tawg, tag nrho cov ntsiab lus no raug ntiab tawm mus rau hauv qhov chaw.
Ib yam li ntawd, qhov sib txawv ntawm Novas yog dab tsi?
Main sub- chav kawm ntawm novae yog classical novae, recurrent novae (RNe), thiab dwarf novae. Lawv tag nrho suav tias yog lub hnub qub cataclysmic sib txawv. Classical nova kev tawg yog feem ntau typ nov.
Nova xim yog dab tsi?
Nova Dawb yog lub teeb, nruab nrab, dej khov ntshav nrog lub mulberry undertone. Nws yog xim zoo meej xim rau trim.
Pom zoo:
Qhov twg tshwm sim thawj lub teeb nyob ntawm qhov tshwm sim lossis lub teeb ywj pheej?
Lub Teeb-Dependent thiab Lub Teeb-Independent Reactions. Cov tshuaj tiv thaiv lub teeb, lossis cov tshuaj tiv thaiv lub teeb-dependent, yog thawj zaug. Peb hu lawv ob leeg thiab ob lub npe. Nyob rau hauv lub teeb-dependent tshwm sim ntawm photosynthesis, lub zog ntawm lub teeb propels lub electrons los ntawm ib tug photosystem mus rau lub high-zog lub xeev
Dab tsi tshwm sim ntawm Theodor Engelmann qhov kev sim nto moo qhia rau nws uas wavelength S yog tus tsav tsheb zoo tshaj plaws ntawm photosynthesis?
Cov kab mob sib sau ua ke ntau tshaj plaws nyob ze ntawm ib feem ntawm cov alga uas tau nthuav tawm cov xim liab thiab xiav wavelengths. Engelmann qhov kev sim ua kom pom tias lub teeb liab thiab xiav yog lub zog zoo tshaj plaws rau photosynthesis
Ob qhov tseem ceeb ntawm lub voj voog ntawm tes yog dab tsi thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Muaj ob theem tseem ceeb hauv lub voj voog ntawm tes. Thawj theem yog interphase thaum lub cell loj hlob thiab replicates nws DNA. Qhov thib ob yog theem mitotic (M-Phase) thaum lub sijhawm cell faib thiab hloov ib daim qauv ntawm nws cov DNA mus rau ob lub hlwb zoo tib yam
Cov kauj ruam ntawm mitosis yog dab tsi thiab dab tsi tshwm sim hauv txhua qhov?
Mitosis muaj tsib theem sib txawv: interphase, prophase, metaphase, anaphase thiab telophase. Cov txheej txheem ntawm cell faib tsuas yog ua tiav tom qab cytokinesis, uas tshwm sim thaum lub sij hawm anaphase thiab telophase. Txhua theem ntawm mitosis yog tsim nyog rau cell replication thiab faib
Dab tsi yog 2 qhov tseem ceeb ntawm lub voj voog ntawm tes thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Cov xwm txheej no tuaj yeem muab faib ua ob qhov tseem ceeb: interphase (hauv nruab nrab ntawm kev sib faib theem ua pawg G1 theem, S theem, G2 theem), thaum lub xov tooj ntawm tes tsim thiab ua nrog nws cov haujlwm metabolic; mitotic theem (M mitosis), thaum lub sij hawm lub cell yog replicating nws tus kheej