Lub ntsiab tseem ceeb ntawm lub Hnub Ci System yog lub hnub, lub hnub qub G2 lub hnub qub uas muaj 99.86% ntawm lub cev paub qhov loj thiab dominates nws gravitationally. Lub hnub plaub lub cev loj tshaj plaws orbiting, cov ntiaj chaw loj, suav txog 99% ntawm cov khoom seem, nrog Jupiter thiab Saturn ua ke suav nrog ntau dua 90%
Ions yog tsim thaum atoms poob los yog nce electrons thiaj li ua tiav txoj cai octet thiab muaj tag nrho cov valence electron shells. Thaum lawv poob electrons, lawv ua tau zoo thiab muaj npe cations. Thaum lawv tau txais electrons, lawv raug nqi tsis zoo thiab muaj npe anions
Space Shuttle Challenger (Orbiter Vehicle Designation: OV-099) yog qhov thib ob orbiter ntawm NASA's Space Shuttle program tau muab tso rau hauv kev pabcuam, tom qab Columbia. Challenger tau tsim los ntawm Rockwell International's Space Transportation Systems Division, hauv Downey, California. Nws lub dav hlau maiden, STS-6, pib lub Plaub Hlis 4, 1983
Txoj kev algebraic yog hais txog ntau txoj hauv kev los daws cov kab zauv sib npaug, suav nrog kev kos duab, hloov pauv thiab tshem tawm
Cov qauv kinetic yooj yim tshaj plaws yog ua raws li cov kev xav tau tias: (1) cov pa roj yog tsim los ntawm ntau cov molecules zoo tib yam txav mus rau hauv cov lus qhia random, sib cais los ntawm qhov deb uas loj piv nrog lawv qhov loj; (2) cov molecules undergo zoo kawg nkaus elastic kev sib tsoo (tsis muaj zog poob) nrog rau ib leeg thiab nrog rau
Hom Ia supernovae yog qhov muaj txiaj ntsig zoo ntawm cov qauv ntawm lub ntiaj teb, vim lawv txhua tus muaj tib lub luminosity. Los ntawm kev ntsuas qhov ci ntsa iab ntawm cov khoom no, ib qho kuj ntsuas qhov nthuav dav ntawm lub ntiaj teb thiab qhov kev hloov pauv ntawm lub sijhawm
Nws kuj suav nrog lawv cov khoom siv lub cev yooj yim xws li solubility thiab cov ntsiab lus kub. Aldehydes thiab ketones yog cov sib txuas yooj yim uas muaj cov pab pawg carbonyl - carbon-oxygen ob daim ntawv cog lus
Zoo, nws yog tus lej nkaus xwb uas tuaj yeem muab faib los ntawm lwm tus lej yam tsis hloov tus lej ntawd. Yog li, yog vim li cas tus lej rau xoom lub zog yog ib qho vim tias ib tus lej rau xoom lub zog tsuas yog cov khoom lag luam tsis muaj tus lej txhua, uas yog tus lej sib npaug, 1
Mitosis yog cov txheej txheem ntawm kev faib tawm nuclear ntawm ib qho diploid (2N) lossis haploid (N) eukaryotic cell uas yog ob tug ntxhais nuclei raug tsim tawm uas yog genetic zoo tib yam rau niam txiv nucleus. Cell faib feem ntau ua raws li kev faib tawm nuclear
Cov npe nrov rau ketones yog tsim los ntawm kev naming ob pawg alkyl txuas nrog carbonyl ces ntxiv cov lus tom qab -ketone. Cov pawg alkyl txuas nrog yog teem rau hauv lub npe ntawm cov tsiaj ntawv. Ketones coj lawv lub npe los ntawm lawv niam txiv alkane chains. Qhov xaus -e raug tshem tawm thiab hloov nrog -one
Muaj qee yam uas muaj tshuaj lom los yog tshuaj lom. Cov uas koj xav kom tsis txhob muaj xws li Lodgepole Pine, Monterey Pine, Ponderosa Pine, Norfolk Pine (Australian Pine), Loblolly Pine, Common Juniper, thiab txawm tias tsis yog ntoo thuv, Yew. Nco ntsoov tias tag nrho cov ntoo thuv yog conifers, tab sis tsis yog txhua tus conifers yog ntoo thuv
Qee cov tsiaj uas nyob hauv Temperate Deciduous Forests yog Black bears, raccoons, Grey Squirrels, White--Tailed Deer, Wild Boars, Rat Snakes, and Wild Turkey. Hma liab, disanguished los ntawm lawv reddish fur, yog ib tug endangered hom ntawm temperate deciduous forests
Tib neeg appendix (ib lub hnab me me nyob ze ntawm qhov sib tshuam ntawm txoj hnyuv me thiab loj) yog homologous rau cov qauv hu ua 'caecum', lub tsev loj, qhov muag tsis pom kev hauv cov nplooj thiab cov nyom tau zom hauv ntau lwm yam tsiaj. Cov ntawv ntxiv feem ntau hu ua 'vestigial' qauv
Thaum 'oval' txhais tau tias yog 'muaj daim ntawv dav dav, cov duab, lossis cov qauv ntawm lub qe,' 'oblong' txhais tau tias 'elongated, feem ntau yog los ntawm daim ntawv square lossis ncig.' Lub oval tuaj yeem raug cais raws li lub voj voog oblong lossis elongated. Oblong cov khoom tuaj yeem ua lub voj voog elongated, xws li ovals, tab sis tuaj yeem ua tau elongated squares
Ib qho chaw nto moo tshaj plaws yog hu ua Mid-Atlantic Ridge thiab nws khiav mus rau sab qaum teb mus rau sab qab teb raws nruab nrab ntawm Dej Hiav Txwv Atlantic. Yog li tshiab dej hiav txwv crust yog tsim nyob rau hauv 'middle' oceans nyob rau hauv Mid Ocean Ridges, thiab nws tau puas lawm qhov twg dej hiav txwv crust ntsib lwm tectonic ciam teb thiab subducts
Cov ntu sib txuas yog cov kab kab uas sib npaug ntawm qhov ntev. Congruent txhais tias sib npaug. Cov kab sib txuas feem ntau yog qhia los ntawm kev kos tib tus nqi ntawm cov kab me me nyob rau hauv nruab nrab ntawm cov ntu, nyob rau ntawm ntu. Peb qhia ib kab los ntawm kos ib kab hla nws ob qhov kawg
Rau tus neeg nruab nrab, txawm tias qhov nruab nrab rockhound, feldspar zoo nkauj npaum li qub txawm nws ntog nyob rau qhov twg. Tsis tas li ntawd, xav txog tias cov pob zeb ntawm ntug hiav txwv dej, dej hiav txwv crust, yuav luag tsis muaj quartz txhua, tab sis muaj ntau ntawm feldspar. Yog li nyob rau hauv lub ntiaj teb crust, feldspar yog cov ntxhia tshaj plaws
Ob lub tswv yim tseem ceeb uas tsav evolution yog kev xaiv ntuj thiab genetic drift. Kev xaiv ntuj yog cov txheej txheem los ntawm cov khoom qub txeeg qub teg ua rau lub cev muaj feem muaj sia nyob thiab yug me nyuam. Keeb kwm tau hais los ntawm Charles Darwin, kev xaiv ntuj yog tus txheej txheem uas ua rau muaj kev hloov pauv ntawm lub cev
Nroj tsuag thiab photosynthetic algae thiab cov kab mob siv lub zog los ntawm tshav ntuj los ua ke cov pa roj carbon dioxide (C02) los ntawm huab cua nrog dej (H2O) los tsim cov carbohydrates. Cov carbohydrates no khaws lub zog. Oxygen (O2) yog ib qho khoom siv uas tso tawm rau hauv qhov chaw. Cov txheej txheem no hu ua photosynthesis
Nws cuam tshuam nrog nano fibers ntawm qib atomic thiab molecular thiaj li yuav tweak lawv cov khoom. Cov thev naus laus zis tshiab no tuaj yeem ua rau cov khaub ncaws zoo kawg xws li cov khaub ncaws tiv thaiv dej thiab tsis muaj av, cov thom khwm tsis muaj ntxhiab, thiab cov khaub ncaws ntse uas tuaj yeem tswj hwm huab cua rau koj
Proteins yog cov loj, complex molecules uas ua si ntau lub luag haujlwm tseem ceeb hauv lub cev. Lawv ua haujlwm feem ntau hauv cov hlwb thiab xav tau rau cov qauv, kev ua haujlwm, thiab kev tswj hwm ntawm lub cev cov ntaub so ntswg thiab cov kabmob. Lawv kuj pab tsim cov molecules tshiab los ntawm kev nyeem cov ntaub ntawv caj ces khaws cia hauv DNA
Thaum koj pom cov nplooj xim av nyob rau sab hauv ntawm Emerald cedars, feem ntau tsis yog ib qho teeb meem: nws yog ib txwm pom cov nplooj xim av nyob rau hauv cheeb tsam no thaum lub caij nplooj zeeg los yog caij nplooj ntoos hlav, vim hais tias cov nplooj tsuas yog laus thiab cov Emerald cedars yog shedding nws. Koj cov Emerald cedars tuaj yeem ua rau cov kab mob fungal
Sim xav seb puas yog ob qho piv txwv yog proportional? Yog tias lawv nyob hauv daim ntawv feem, muab lawv sib npaug rau ib leeg los kuaj seb lawv puas yog proportional. Hla multiply thiab simplify. Yog tias koj tau txais cov lus tseeb, ces qhov sib piv yog proportional
Optical tej thaj chaw deb sensing pab kiag li lawm ua hauj lwm nyob rau hauv lub pom, nyob ze infrared, nruab nrab infrared thiab luv yoj infrared ib feem ntawm lub electromagnetic spectrum. Cov khoom siv no muaj kev nkag siab rau lub wavelengths xws li 300nm txog 3000nm
Muaj 14 hom ntoo ntoo ntoo nyob hauv Ohio. Ib tug ntawm lawv yog cov ntoo qhib dawb ntawm kuv thaum yau, Quercus alba. Dawb ntoo qhib kuj yog lub npe muab rau ib tug subgenera ntawm ntoo qhib. Cov ntoo qhib no, uas suav nrog Bur Oak, Swamp White Oak, thiab Chinkapin Oak, muaj cov lus qhia sib npaug rau lawv cov nplooj thiab cov tawv tawv tawv dua
Thawj txoj cai ntawm thermodynamics, tseem hu ua Txoj Cai Kev txuag hluav taws xob, hais tias lub zog tsis tuaj yeem tsim lossis rhuav tshem; lub zog tsuas yog kis tau lossis hloov ntawm ib daim ntawv mus rau lwm qhov. Hauv lwm lo lus, lub zog tsis tuaj yeem tsim lossis rhuav tshem
GIS yog dab tsi? Ua ke ntau yam ntawm cov qauv ntawm cov qauv ntawm daim duab qhia tau piav qhia
Hauv eukaryotes, lub voj voog Krebs siv cov molecule ntawm acetyl CoA los tsim 1 ATP, 3 NADH, 1 FADH2, 2 CO2, thiab 3 H +. Ob lub molecules ntawm acetyl CoA yog tsim nyob rau hauv glycolysis yog li tag nrho cov molecules tsim nyob rau hauv lub citric acid voj voog yog ob npaug (2 ATP, 6 NADH, 2 FADH2, 4 CO2, thiab 6 H +)
Mass cuam tshuam / tsis cuam tshuam rau tus nqi ntawm lub zog. Ib qho khoom siv taug kev nrawm dua thiab nrawm dua muaj lub zog kinetic uas nce / txo qis / nyob twj ywm tib yam. Ib qho khoom siv taug kev nrawm dua thiab nrawm dua muaj lub zog muaj peev xwm nce / txo qis / tseem nyob qub
Cov kua chlorine muaj pH ntau dua li nws daim ntawv hmoov. Nws yog siv feem ntau los ntawm cov tswv pas dej ua lag luam lossis cov pas dej ua ke nrog ntau yam kev ua, thiab nws yog pheej yig dua cov hmoov, yog li thaum nws yuav tsum tau muab ntxiv rau hauv ntau rau cov pas dej loj, nws ua rau muaj kev lag luam ntau dua
ib 760mph Tsuas yog li ntawd, lub suab nrawm npaum li cas? Huab cua taug kev ntawm ceev ntawm suab thiab muaj tus nqi ntawm 340 meters ib ob. Cov ceev ntawm suab nyob rau hauv huab cua ntawm hiav txwv theem tsiv li 1 mais txhua 5 vib nas this.
Yog tias peb xav nrhiav ib yam dab tsi uas txuas txhua yam dab tsi yuav yog? Tib yam uas nyob txhua qhov chaw uas txuas txhua yam yog SPACE. Qhov chaw nyob nruab nrab ntawm galaxies, hnub qub, ntiaj chaw, hlwb, atoms. Txawm tias cov qauv atomic yog tsim tawm ntawm 99.99999% qhov chaw
Auxins yog thawj cov tshuaj hormones nrhiav pom. Charles Darwin yog thawj cov kws tshawb fawb los ua dab tsi hauv kev tshawb fawb txog kev cog qoob loo. Nyob rau hauv nws phau ntawv 'Lub Hwj Chim ntawm Kev Sib Tw hauv Cov Nroj Tsuag' nthuav tawm xyoo 1880, nws thawj zaug piav qhia txog cov teebmeem ntawm lub teeb ntawm kev txav ntawm cov nyom canary (Phalaris canariensis) coleoptiles
Feem ntau, yog tias ib tus niam txiv tsis yog tus neeg nqa khoom, qhov tshwm sim uas tus menyuam yuav muaj tus kabmob yog: ½ lub sij hawm (qhov tshwm sim rau lwm tus niam txiv yog tus nqa khoom). Qhov ntawd yog, peb muab qhov tshwm sim ntawm kev kis tus kab mob allele, & frac12, lub sij hawm qhov tshwm sim uas niam txiv ua, qhov tseeb, nqa tus kab mob allele
Lub Linnaean system ntawm kev faib tawm muaj cov hierarchy ntawm pawg, hu ua taxa (singular, taxon). Taxa ntau ntawm lub nceeg vaj mus rau hom (saib daim duab hauv qab). Lub nceeg vaj yog pawg loj tshaj plaws thiab muaj kev sib koom ua ke. Nws muaj cov kab mob uas sib koom tsuas yog ob peb yam sib xws
Dab tsi ua rau lub ntiaj teb kev loj hlob ntawm cov pej xeem hauv 150 xyoo dhau los? Kev nce qib hauv tshuaj, kev huv huv thiab khoom noj khoom haus thiab kev tsim khoom noj ntau ntxiv tau ua rau muaj txiaj ntsig ntawm kev loj hlob
Ib qho piv txwv ntawm cov nonelectrolyte yog cov piam thaj, lossis C6H12O6. Glucose (qab zib) tau yooj yim yaj hauv dej, tab sis vim tias nws tsis cuam tshuam rau hauv ions hauv kev daws, nws suav tias yog ib qho tsis muaj electrolyte; Yog li ntawd, cov kev daws teeb meem uas muaj cov piam thaj tsis ua hluav taws xob. "Tsis muaj kev cia siab." "nonelectrolyte."
Hauv New Zealand's Bay of Plenty thaum Lub Kaum Ob Hlis 9, 2019, White Island volcano, hu ua Whakaari hauv haiv neeg Maori, tau tawg tawg. Ntawm 47 tus neeg ntawm cov kob thaum lub sijhawm ntawd, 18 tus neeg raug tua thiab ntau tus neeg raug mob hnyav. Volcanologist Bill McGuire coj peb los ntawm qhov tshwm sim
Yog li, tus qauv theoretical tuaj yeem txhais tau tias yog ib qho kev xav uas tsim los piav txog qhov xwm txheej lossis qhov tshwm sim thiab ntxiv mus, kom muaj peev xwm kwv yees nws. Kev tsim qauv theoretical yog ua raws li tus lej lossis cov txheej txheem theories. Cov kev xav no yog siv los piav qhia qee qhov xwm txheej, tshwm sim, hom cwj pwm
Qhov tshwm sim ntawm ob lub pronuclei yog thawj lub cim ntawm kev ua tiav fertilization raws li tau pom thaum lub sij hawm nyob rau hauv vitro fertilisation, thiab feem ntau pom 18 teev tom qab insemination los yog ICSI. Lub zygote yog ces hu ua ob-pronuclear zygote (2PN)