Nyob rau theem khoom, txawm li cas los xij, tsis muaj qhov zoo li kev daws teeb meem. Los ntawm kev txhais, pH muaj feem xyuam rau qhov concentration ntawm hydrogen ion solvated hauv cov kua. Qhov ntawd tuaj yeem yog cov tshuaj aqueous, nyob rau hauv pH feem ntau ntawm -2 txog 16
Xim: Ntshiab quartz yog nyob deb ntawm cov xim feem ntau ntawm Keokuk Geodes. Luster: Glassy rau vitreous li crystals, thaum cov ntaub ntawv cryptocrystalline feem ntau yog waxy rau npub tab sis tuaj yeem ua rau vitreous. Transparency: Crystals yog pob tshab rau translucent, cov ntaub ntawv cryptocrystalline tuaj yeem ua tau translucent lossis opaque
Random Variable yog ib txheej ntawm qhov ua tau los ntawm kev sim random. Txhawm rau xam qhov Variance: square txhua tus nqi thiab muab faib los ntawm nws qhov tshwm sim. sum lawv thiab peb tau Σx2p. tom qab ntawd rho tawm cov xwmfab ntawm Tus Nqi Xav Tau μ
Lineweaver-Burk Plot y = 1/V. x = 1/S. m = KM/Vmax b = 1/[S] x-intercept = -1/KM
Cia li xav txog 2x2 matrix uas zoo ib yam li nws qhov kev thim rov qab yam tsis muaj kab pheeb ces kaum nkag yog 1 lossis -1. Diagonal matrices yuav ua. Yog li, A thiab inverse ntawm A zoo ib yam, yog li lawv cov eigenvalues tib yam. Yog tias ib qho ntawm A's eigenvalues yog n, eigenvalues ntawm nws qhov kev hloov pauv yuav yog 1 / n
Chloroplast tig hnub ci, carbon dioxide, thiab dej rau hauv cov zaub mov (qabzib). Dab tsi organelle raug suav hais tias yog 'lub Hoobkas', vim tias nws siv cov khoom siv raw thiab hloov mus rau cov khoom lag luam ntawm tes uas tuaj yeem siv los ntawm lub xovtooj? Cell membrane tiv thaiv lub cell; tswj qhov nkag mus rau hauv thiab tawm ntawm tes, kev sib txuas lus
Granite yog ib lub pob zeb uas tshwm sim nyob rau hauv lub ntiaj teb nto los ntawm cov kua magma uas txias thiab ces solidifies. Cov pob zeb ntau yam uas ua rau nws muaj pes tsawg leeg yog semi-precious pob zeb, uas feem ntau siv rau cov hniav nyiaj hniav kub. Gemstone yog ib qho khoom siv zoo tshaj plaws uas zoo li tsis muaj lwm yam
Kev piav qhia. Variegated Japanese willow tau txais nws lub npe nrov, dappled willow, los ntawm mottled mix ntawm ntsuab, dawb thiab liab ntawm nws nplooj. Nrog lub hnub txaus, lub dappled willow tuaj yeem tua txog 20 feet siab, tab sis cov neeg ua teb tuaj yeem tuav nws ntawm ib nrab qhov siab nrog pruning
Txhua tus Cnidarians muaj tentacles nrog stinging hlwb nyob rau hauv lawv cov lus qhia uas yog siv los ntes thiab subdue prey. Qhov tseeb, lub npe phylum 'Cnidarian' txhais tau tias 'stinging creatures. "Cov kab mob stinging" yog hu ua cnidocytes thiab muaj cov qauv hu ua nematocyst. Lub nematocyst yog ib tug coiled xov zoo li stinger
Hluav taws xob tam sim no thiab cov pa hluav taws xob tam sim no yog hais txog kev txav cov khoom siv hluav taws xob. Tam sim no yog tus nqi ntws ntawm tus nqi; Nws yog tus nqi ntawm cov nqi ntws ib ob los ntawm tus neeg xyuas pib. Qhov sib npaug ntawm kev suav tam sim no yog: I = tam sim no (amps, A) Q = tus nqi ntws dhau los ntawm qhov taw tes hauv Circuit Court (coulombs, C)
Rau qhov cubes me dua qhov no, thaj chaw saum npoo yog ntau dua piv rau qhov ntim ntau dua li nws nyob hauv qhov loj dua (qhov ntim ntau dua piv rau thaj chaw saum npoo). qhia meej meej tias raws li qhov loj ntawm ib yam khoom nce (tsis hloov pauv), qhov piv txwv no txo qis
Muaj ob pawg tseem ceeb ntawm kev sib tham hauv archaeology: indirect los yog txheeb ze sib tam thiab kiag li kev sib tam. Cov txheeb ze sib tam suav nrog cov txheej txheem uas tso siab rau kev txheeb xyuas cov ntaub ntawv sib piv lossis cov ntsiab lus (piv txwv li, geological, regional, kab lis kev cai) nyob rau hauv uas cov khoom uas ib tug xav mus rau hnub tim yog pom
Ua ke, av microorganisms ua lub luag haujlwm tseem ceeb hauv kev decomposing organic teeb meem, cycling as-ham thiab fertilising av. Av microbes yog qhov tseem ceeb hauv txoj haujlwm no. Av microbes kuj tseem ceeb heev rau kev txhim kho cov qauv av zoo
C8H18 Nyob rau hauv no, dab tsi yog qhov empirical formula ntawm octane c8h18? Cov empirical formula ntawm octane $$C_{8}H_{18}$$ yog: A. B. C. Ib yam li ntawd, tus qauv empirical ntawm c2h6o2 yog dab tsi? Molecular thiab Empirical Formulas Lus nug Teb Sau cov mis emirical rau cov compound hauv qab no:
Cypress ntoo tsis yog nyob rau tebchaws Canada, tab sis muaj qee yam uas yuav loj hlob zoo hauv qee thaj tsam. Tshwj xeeb, Lawson, Hinoki thiab Sawara cypresses tau qhia rau Canada thiab muaj peev xwm loj hlob zoo nyob rau ntawd
Technically, cawv yog lub npe ntawm cov khoom siv hauv chav kawm uas muaj ib lossis ob peb pawg hydroxyl.Anazeotrope [] yog sib xyaw ntawm ob lossis ntau dua cov kua dej uas tsis tuaj yeem hloov pauv los ntawm kev distillation yooj yim. Lwm cov khoom lag luam, xws li isopropanol thiab acetone
Brownian Motion Piv Txwv Feem ntau cov piv txwv ntawm Brownian motion yog thauj cov txheej txheem uas cuam tshuam los ntawm cov dej ntws loj, tseem muaj cov pedesis. Piv txwv li: Kev txav ntawm paj paj noob qoob rau ntawm cov dej tseem. Kev txav ntawm plua plav motes hauv chav tsev (txawm hais tias feem ntau cuam tshuam los ntawm huab cua tam sim no)
Lub Ntiaj Teb Science Reference Tables (ESRT) yog cov cuab yeej tseem ceeb rau cov tub ntxhais kawm tshawb fawb hauv ntiaj teb. Nws muaj cov kev ntsuas tseem ceeb, qhov sib npaug, daim duab qhia chaw, thiab cov lus qhia. Phau ntawv no feem ntau siv rau hauv chav kawm, kev xeem, thiab kev ua haujlwm hauv chav kuaj. ESRT kuj tseem siv rau hauv Ntiaj Teb Kev Tshawb Fawb Regents Exam
'proton flow' tsuas yog hu ua 'proton flow'. Nws tsis tau txais ib lub npe tshwj xeeb. Lawv yog 'nucleons' (los yog cov khoom ntawm atomic nucleus, zoo li neutrons) thiab peb tsis hais txog 'hluav taws xob tam sim no' thaum lawv yog nuclear hais
Kev sib tw tshwm sim ntawm ob yam kab mob los yog hom kab mob uas ob leeg siv zog rau tib yam kev txwv nyob hauv ib puag ncig. Piv txwv ntawm cov peev txheej tsawg yog lub teeb, zaub mov, lossis chaw nyob. Kev sib raug zoo symbiotic yog kev sib raug zoo ntawm tsawg kawg ob hom uas
Catalytic converter substrates Catalytic converters yog siv los txo cov nqi ntawm nitrogen oxides, carbon monoxide, thiab unreacted hydrocarbons nyob rau hauv tsheb emissions. Nyob rau hauv ntau tshaj peb-txoj kev converters ib tus neeg catalysts ua kom txo tau ntawm txhua hom ib txhij
Nitrogen 2 yog qhov yooj yim tshaj plaws vim tias tsis muaj resonance los khi lawv cov electrons thiab 3 R-pab pawg yog electron pub dawb (inductive effect). Nitrogen 3 yog qhov yooj yim tshaj plaws vim hais tias ib leeg khub ntawm N yog nyob rau hauv resonance nrog C = O
Galena yog qhov tseem ceeb tshaj plaws ntawm cov hlau lead. Nyiaj feem ntau yog ua los ntawm cov khoom. Cov hmoov txhuas feem ntau yog siv los ua cov roj teeb, txawm li cas los xij, cov nyiaj tseem ceeb kuj tau siv los ua cov ntawv txhuas, yeeb nkab thiab txhaj tshuaj. Nws kuj yog siv los ua cov alloys uas tsis tshua muaj melting point
Nyob rau hauv geometry, ib tug octahedron (plural: octahedra) yog ib tug polyhedron nrog yim lub ntsej muag, kaum ob ntug, thiab rau vertices. Lo lus feem ntau yog siv los xa mus rau qhov tsis tu ncua octahedron, Platonic cov khoom tsim los ntawm yim daim duab peb sab sib npaug, plaub qhov sib ntsib ntawm txhua qhov vertex
Qhov ntom ntawm iav sib txawv nrog txhua hom thiab thaj tsam ntawm 2000 txog 8000 kg / m3 (rau kev sib piv, los ntawm qhov ntom ntom dua aluminium rau ntau ntom dua hlau) ntawm cov qauv txheej txheem. Flint iav tuaj yeem ua tau ntau dua li cov iav iav vim tias flint iav muaj cov hlau lead, uas yog cov khoom ntom ntom
Electronegativity yog hais txog lub peev xwm ntawm ib lub atom los nyiam cov khoom siv hluav taws xob sib koom ua ke hauv covalent daim ntawv cog lus. Qhov siab dua tus nqi ntawm electronegativity, qhov ntau zog uas lub ntsiab attracts sib koom electrons. Yog li, fluorine yog cov khoom siv electronegative tshaj plaws, thaum francium yog ib qho ntawm cov electronegative tsawg tshaj plaws
Liquefaction yog ib qho tshwm sim nyob rau hauv uas lub zog thiab nruj ntawm cov av yog txo los ntawm av qeeg co los yog lwm yam ceev loading. Ua ntej muaj av qeeg, cov dej siab kuj qis
Deforestation ntawm ntoo ua rau dej nyab thiab drought heev, vim hais tias cov av loosens li khi vim txiav ntoo. Nyob rau hauv no txoj kev, nquag dej nyab thiab drought tshwm sim los ntawm Deforestation. Cov ntoo pab tuav cov av ua ke
Thaum Lub Yim Hli 21, 2017, muaj tag nrho cov hnub ci dab noj hnub pom nyob hauv txoj siv sia hla thoob plaws Tebchaws Meskas. Qhov no yog thawj tag nrho hnub ci dab noj hnub pom los ntawm txhua qhov chaw ntawm lub tebchaws United States av loj txij li tag nrho hnub ci dab noj hnub nyob rau lub Peb Hlis 1979
Yuav ua li cas lub sij hawm luv luv yog sawv cev los ntawm qhov tsis sib haum xeeb ntawm lub hauv paus ntawm pob zeb txheej G? Los ntawm 75 mus rau 150 lab xyoo 9
Cov ntoo coniferous hav zoov ntsuab uas tsis yog ntoo Mosses Mosses muaj ntau nyob hauv hav zoov; muaj ntau txog 25,000 hom. Lawv loj hlob nyob rau hauv av, tsob ntoo trunks, decaying cav, thiab pob zeb
Kev txwv qhov tseem ceeb kuj tuaj yeem faib ua pawg ntxiv. Cov yam ntxwv ntawm lub cev lossis cov kab mob abiotic muaj xws li kub, dej muaj, oxygen, salinity, lub teeb, zaub mov thiab cov as-ham; biological yam tseem ceeb los yog biotic yam, koom nrog kev sib cuam tshuam ntawm cov kab mob xws li predation, kev sib tw, parasitism thiab herbivory
Meridians. Cov kab kev xav uas khiav sab qaum teb thiab sab qab teb ntawm ib daim ntawv qhia los ntawm ncej mus rau ncej. Meridians qhia txog qib ntawm longitude, los yog deb npaum li cas ib qho chaw nyob deb ntawm qhov tseem ceeb meridian. Tus thawj meridian khiav hla Greenwich, England
Lub sij hawm ntawm lub zog los yog lub zog Lub sij hawm ntawm lub zog. Qhov ntev ntawm lub sijhawm yog [M L2 T-2] uas yog tib yam li lub zog, txawm li cas los xij tsis muaj kev sib raug zoo ntawm ob. Qhov ntsuas SI ntawm ib pliag yog Newton meter (Nm)
Lub hnub lub zog yog dab tsi thiab piav qhia txog cov txheej txheem? Nuclear fusion - nuclei ntawm me me atoms koom ua ib lub nucleus loj. Qhov tshwm sim ntawm qhov fusion nuclear no yog tso tawm lub zog. Lub fusion ntawm hydrogen rau hauv helium nyob rau hauv lub hnub ua rau ib tug loj npaum li cas ntawm lub zog thiab yog lub hnub lub zog qhov chaw
Lub nucleus ntawm lub atom yog ib cheeb tsam me me nyob rau hauv nruab nrab ntawm ib lub atom uas muaj protons thiab neutrons. Yuav luag tag nrho cov loj ntawm ib lub atom nyob rau hauv lub nucleus, nrog ib tug tsawg heev pab los ntawm cov electron plhaub
Grounding mats yog txhais tau tias coj kev sib txuas rau lub ntiaj teb sab hauv tsev. Cov mats feem ntau txuas ntawm ib lub xaim mus rau hauv av chaw nres nkoj ntawm lub qhov hluav taws xob. Cov lev tuaj yeem muab tso rau hauv pem teb, ntawm lub rooj, lossis saum txaj kom tus neeg siv tuaj yeem tso lawv txhais taw, txhais tes, lossis lub cev rau ntawm daim lev thiab coj lub ntiaj teb lub zog
Tus naj npawb ntawm cov protons pom nyob rau hauv lub nucleus sib npaug ntawm cov electrons uas nyob ib puag ncig nws, muab lub atom rau nruab nrab (neutrons muaj pes tsawg tus nqi). Feem ntau ntawm ib qho atom loj yog nyob rau hauv nws cov nucleus; qhov loj ntawm ib tug electron tsuas yog 1/1836 qhov loj ntawm lub lightest nucleus, uas yog hydrogen
Tag nrho cov nyob rau hauv tag nrho cov, sunspots tshwm tsaus nti vim hais tias cov yog darker tshaj qhov chaw nyob ib ncig ntawm. Lawv tsaus dua vim lawv txias dua, thiab lawv txias dua vim muaj cov hlau nplaum sib nqus hauv lawv
Tsiaj cell faib los ntawm ib tug cleavage furrow. Cov nroj tsuag faib los ntawm ib lub phaj ntawm tes uas nws thiaj li dhau los ua phab ntsa ntawm tes. Cytoplasm thiab cell membranes yog tsim nyog rau cytokinesis hauv cov nroj tsuag thiab tsiaj txhu