Qhov siab tshaj plaws pub rau WHO tus nqi pub dawb chlorine seem hauv cov dej haus yog 5 mg / L. Qhov tsawg kawg nkaus pom zoo rau WHO tus nqi rau cov tshuaj dawb chlorine seem hauv cov dej haus yog 0.2 mg / L. CDC pom zoo kom tsis pub tshaj 2.0 mg / L vim muaj kev txhawj xeeb txog kev saj, thiab cov tshuaj chlorine uas seem nyob hauv lub sijhawm hauv cov dej khaws cia
Cov ntoo siab tshaj plaws hauv ntiaj teb yog cov ntoo liab (Sequoia sempervirens), uas ntauwd saum av hauv California. Cov ntoo no tuaj yeem ncav cuag qhov siab ntawm 300 ko taw (91 meters). Ntawm cov ntoo liab, ib tsob ntoo hu ua Hyperion dwarfs lawv tag nrho. tsob ntoo tau pom xyoo 2006, thiab yog 379.7 ko taw (115.7 m) siab
Ntawd yog, benzene yuav tsum pub dawb electrons los ntawm sab hauv lub nplhaib. Yog li, benzene ua tsawg reactive hauv EAS thaum deactivating pab pawg muaj nyob rau ntawm nws. Cov pab pawg deactivating feem ntau yog cov pab pawg rho tawm hluav taws xob zoo (EWGs). Cov no yog, los ntawm sab laug mus rau sab xis: phenol, toluene, benzene, fluorobenzene, thiab nitrobenzene
Tropical rainforests muaj plaub txheej: Emergent Layer. Cov ntoo loj heev thrust saum lub densecanopy txheej thiab muaj cov nceb zoo li cov ntoo loj. Txheej Txheej. Qhov dav, tsis xwm yeem cov ntoo ntawm cov ntoo no ua kom nruj, tsis tu ncua canopy 60 mus rau 90 ko taw saum toj no. Dab neeg. Hav zoov pem teb. Av thiab Nutrient Recycling
Ntoo diav rawg yog ib tug bifurcation nyob rau hauv lub cev ntawm ib tsob ntoo muab nce mus rau ob roughly tib txoj kab uas hla. Cov diav rawg no yog ib qho tshwj xeeb ntawm tsob ntoo crowns. Ntoo grain orientation nyob rau sab saum toj ntawm ib tug ntoo diav rawg yog xws li hais tias cov ntoo grain qauv feem ntau interlocks los muab kev pab txhua yam txaus
Lub amplitude ntawm ib nthwv dej muaj feem xyuam rau tus nqi ntawm lub zog nws nqa. Lub siab amplitude nthwv dej nqa ntau lub zog; ib tug tsawg amplitude nthwv dej nqa ib tug me me lub zog. Qhov nruab nrab ntawm lub zog dhau los ntawm ib cheeb tsam ntawm ib chav tsev ntawm lub sij hawm nyob rau hauv ib qho kev qhia tshwj xeeb yog hu ua qhov kev siv ntawm nthwv dej
Thaum koj muab qhov tsis zoo los ntawm qhov tsis zoo koj tau txais qhov zoo, vim tias ob lub cim tsis zoo raug muab tso tseg
Kev sib txuas Coefficient. Hauv qhov kev qhia no, thaum peb hais lus yooj yim ntawm kev sib txheeb coefficient, peb tab tom xa mus rau Pearson cov khoom lag luam-lub sijhawm sib raug zoo. Feem ntau, qhov sib txheeb coefficient ntawm ib qho piv txwv yog qhia los ntawm r, thiab qhov sib txheeb coefficient ntawm cov pej xeem yog denoted los ntawm ρ los yog R
Nov yog peb phau ntawv qhia yooj yim rau kev txheeb xyuas cov ntoo British. Hom txiv qaub - Tilia x europaea. English Oak - Quercus robur. Lub dav hlau London - Platanus x hispanica. Common beech - Fagus sylvatica. Scots ntoo thuv - Pinus sylvestris. Crack willow - Salix fragilis. English elm – Ulmus minor var. lus vulgaris. Teb maple - Acer campestre
Elements thiab compounds yog ob qho tib si piv txwv ntawm cov khoom ntshiab. Ib yam khoom uas tuaj yeem tawg mus rau hauv cov tshuaj lom neeg yooj yim dua (vim tias nws muaj ntau dua ib qho) yog ib qho khoom sib xyaw. Piv txwv li, dej yog acompound tsim los ntawm cov ntsiab lus hydrogen thiaboxygen
Euclid qhov kev koom tes tseem ceeb yog sib sau ua ke, sau ua ke, teeb tsa, thiab rov ua cov tswv yim lej ntawm nws cov thawj coj ua ib qho zoo ib yam, tom qab ntawd los ua lub npe hu ua Euclidean geometry. Hauv Euclid txoj kev, kev txiav tawm yog tsim los ntawm thaj chaw lossis axioms
Redshift thiab blueshift piav qhia txog yuav ua li cas lub teeb hloov mus rau luv luv lossis ntev wavelengths raws li cov khoom hauv qhov chaw (xws li hnub qub lossis galaxies) txav los ze dua lossis deb ntawm peb. Thaum ib yam khoom txav deb ntawm peb, lub teeb hloov mus rau qhov kawg ntawm lub spectrum, vim nws lub wavelengths ntev dua
Thawj qhov koj pom thaum koj saib ib tug neeg tuaj yeem yog lawv cov plaub hau, khaub ncaws, qhov ntswg, lossis daim duab. Cov no yog tag nrho cov piv txwv ntawm lub cev yam ntxwv. Qee cov lus tshaj tawm uas koj tuaj yeem siv los piav txog kev tsim tus neeg tuaj yeem suav nrog cov hauv qab no: Plump. Stocky. Poob hnyav. Rog. Pudgy. Nruab nrab tsim. Ua kis las. Slender
Mitochondria, Cell Phab ntsa, Cell membrane, Chloroplast, Cytoplasm, Vacuole. Lub cell phab ntsa, chloroplasts thiab vacuole muaj nyob rau hauv cov nroj tsuag cell es tsis yog tsiaj hlwb
Ib kab yog hais tias yuav tsum tau perpendicular mus rau lwm txoj kab yog tias ob kab sib tshuam ntawm lub kaum sab xis. Qhia meej, thawj kab yog nyob rau ntawm kab thib ob yog (1) ob kab sib ntsib; thiab (2) ntawm qhov taw tes ntawm kev sib tshuam lub kaum sab xis ntawm ib sab ntawm thawj kab yog txiav los ntawm kab thib ob rau hauv ob lub kaum sab xis
Qhov Zoo Tshaj Cov Menyuam Sib Nqus Cov Khoom Ua Si ntawm 2020 Magna-Tiles Clear Colors Set. Expandable Magnet Teeb. PicassoTiles Magnet Tsev Vuas. Magformers Challenger Sib Nqus Tsev Blocks. Melissa & Doug nuv ntses Game. Playmags 100 Daim Super Teeb. LeapFrog Magnetic Letter Set. 4M Magnetic Vuas Art. Melissa & Doug Sib Nqus Dinosaurs
Txawm hais tias asteroids orbit lub hnub zoo li cov ntiaj chaw, lawv muaj tsawg dua cov ntiaj chaw. Muaj ntau lub asteroids hauv peb lub hnub ci. Lawv feem ntau nyob hauv txoj siv asteroid loj - thaj tsam ntawm lub orbits ntawm Mars thiab Jupiter. Qee lub hnub qub mus rau pem hauv ntej thiab tom qab Jupiter
Qhov ' txheeb ze nplua nuj' ntawm ib qho isotope txhais tau tias feem pua ntawm cov isotope uas tshwm sim hauv qhov xwm txheej. Cov ntsiab lus feem ntau yog tsim los ntawm kev sib xyaw ntawm isotopes. Cov lej ntawm cov feem pua ntawm cov isotopes tshwj xeeb yuav tsum ntxiv txog 100%. Tus txheeb ze atomic mass yog qhov hnyav nruab nrab ntawm cov isotopic masses
Txoj Cai Thib Ob ntawm Thermodynamics hais tias lub xeev ntawm entropy ntawm tag nrho lub ntiaj teb, raws li ib qho kev sib cais, yuav ib txwm nce ntxiv nyob rau lub sijhawm. Txoj cai thib ob kuj hais tias qhov kev hloov pauv hauv entropy hauv ntiaj teb tsis tuaj yeem ua qhov tsis zoo
Elliptical Orbit Qhov nruab nrab, qhov kev ncua deb yog li ntawm 382,900 mais (238,000 mais) ntawm lub hli nruab nrab mus rau qhov nruab nrab ntawm lub ntiaj teb. Lub ntsiab lus ntawm lub hli lub voj voog ze tshaj plaws rau lub ntiaj teb yog hu ua perigee thiab qhov taw qhia deb tshaj plaws yog apogee
Nws yog qhov tshwj xeeb uas nws muaj cov khoom ntawm cov hlau thiab cov hlau tsis yog hlau: nws hloov tau yooj yim tab sis tsis elastic, muaj thermal conductivity thiab hluav taws xob siab, thiab yog cov refractory thiab chemically inert. Graphite muaj qhov tsis tshua muaj adsorption ntawm X-rays thiab neutrons ua rau nws yog ib qho khoom siv tshwj xeeb hauv kev siv nuclear
Ernest Rutherford, uas tau ua ntau yam kev sim kawm txog cov khoom ntawm cov xov tooj cua decay, hu ua cov alpha, beta, thiab gamma particles, thiab cais lawv los ntawm lawv lub peev xwm nkag mus rau qhov teeb meem
Chemical bond. Lub zog txaus nyiam uas tuav ua ke cov atoms, ions, los yog pawg ntawm atoms hauv ib lub molecule los yog compound. covalent bond. Ib daim ntawv cog lus tshuaj uas koom nrog sib koom ib khub ntawm electrons ntawm atoms hauv ib lub molecule. Koj nyuam qhuav kawm 31 nqe lus
Founded hauv 1934, Osmose yog tus thawj coj hauv khw muag khoom ntawm kev tshuaj xyuas tseem ceeb, kev saib xyuas thiab kho dua tshiab rau kev siv hluav taws xob thiab kev sib txuas lus hauv North America
Kev siv Volume hauv Lub Neej Txhua Hnub Hauv Qab. Ib txoj hauv kev tseem ceeb ntim tau siv txhua hnub yog thaum xam cov dej haus. Fueling Up. Thaum koj sau koj lub tsheb, qhov ntim ntawm cov roj av koj cov roj tank tuav txiav txim siab koj yuav khoom. Ua noj thiab ci. Ntxuav tsev. Kev txuag dej. Cov pas dej da dej kub
Cov cheeb tsam kub kub txhais tau hais tias thaj av uas ib txwm muaj qhov kub ntawm 65 ° F lossis siab dua. feem ntau qhov chaw ntawm cov no yog ze rau lub ntiaj teb txoj kab nruab nrab. Nyob rau hauv temperate cheeb tsam, muaj variation nyob rau hauv qhov kub thiab txias, tiam sis tsis heev txias los yog kub. Feem ntau qhov chaw ntawm cov no yog nruab nrab ntawm txoj kab nruab nrab thiab ncej
Qhov ntiv tes yog ib txwm yog qhov tsawg tshaj plaws ntawm qhov ntsuas qhov ntev ntawm qhov ntsuas hauv imperial, nrog kev ntsuas me dua li ib nti tau teev tseg siv cov feem 1/2, 1/4,1/8, 1/16, 1/32 thiab 1/64 ntawm ib qho. nti
2 yog cov ntaub ntawv muaj nyob rau hauv ib qho membrane proteins, xws li, transmembrane α-helix protein, transmembrane α-helical protein thiab transmembrane β-daim ntawv protein. Integral monotopic proteins yog ib hom integral membrane proteins uas txuas rau ib sab ntawm daim nyias nyias thiab tsis span tag nrho txoj kev hla
Ib chromosome ntawm txhua homologous khub los ntawm leej niam (hu ua niam txiv chromosome) thiab ib tug los ntawm leej txiv (paternal chromsosome). Homologous chromosomes zoo sib xws tab sis tsis zoo ib yam. Txhua tus nqa tib cov noob hauv tib qho kev txiav txim, tab sis cov alleles rau txhua qhov zoo yuav tsis zoo ib yam
Volume yog hais txog qhov chaw ntawm qhov khoom siv. Hauv lwm lo lus, ntim yog qhov ntsuas qhov loj ntawm ib qho khoom, ib yam li qhov siab thiab qhov dav yog txoj hauv kev los piav txog qhov loj. Yog hais tias cov khoom yog hollow (hauv lwm lo lus, khoob), ntim yog cov dej uas nws tuav tau
Marine biologist kawm txog cov kab mob hauv hiav txwv. Lawv tiv thaiv, saib xyuas, kawm, lossis tswj cov kab mob hauv hiav txwv lossis tsiaj txhu, nroj tsuag, thiab microbes. Piv txwv li, lawv tuaj yeem pom muaj kev tswj xyuas cov tsiaj qus los tiv thaiv cov kab mob marine. Lawv kuj tseem yuav kawm txog cov ntses dej hiav txwv lossis sim tshuaj bioactive
Qhov ceev yog qhov ntsuas ntawm qhov hnyav ntawm ib chav tsev ntawm qhov ntim. Qhov nruab nrab ntom ntom ntawm ib yam khoom sib npaug ntawm nws qhov loj tag nrho muab faib los ntawm nws qhov ntim tag nrho. Ib yam khoom uas ua los ntawm cov khoom sib piv (xws li hlau) yuav muaj qhov ntim tsawg dua li cov khoom sib npaug uas ua los ntawm qee yam khoom ntom ntom (xws li dej)
Mechanical weathering yog kev tawg ntawm pob zeb rau hauv me me yam tsis hloov cov khoom muaj pes tsawg leeg hauv pob zeb. Qhov no tuaj yeem muab faib ua plaub yam yooj yim - abrasion, siab tso tawm, thermal expansion thiab contraction, thiab siv lead ua loj hlob
Population III (Pop III) hnub qub yog tsim los ntawm cov pa roj ntsha tseem ceeb - hydrogen, helium thiab tsawg heev ntawm lithium thiab beryllium. Cov hnub qub Pop III tom qab ntawd yuav tsim cov hlau pom hauv Pop II hnub qub thiab pib maj mam nce hauv metallicity hla cov hnub qub tom ntej
Physical and Chemical Properties Txawm li cas los xij, qhov tseeb tias ib yam khoom muaj qee yam khoom ntawm lub cev tsis tuaj yeem siv los kwv yees txog kev phom sij ntawm lub cev. Piv txwv li, tag nrho cov tshuaj volatile tsis tas yuav tawg. Qee cov khib nyiab kuj tuaj yeem tawg tau (piv txwv li, TNT lossis hmoov nplej hmoov av)
35km ua Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog qhov kwv yees thickness ntawm lub stratosphere? Cov stratosphere yog thaj tsam uas txuas ntawm 16 km mus rau 50 km. Yog li, cov thickness ntawm lub stratosphere yog 34km. Tsis tas li ntawd, lub stratosphere yog dab tsi?
Topoisomerases yog cov enzymes uas koom nrog hauv kev dhau los lossis kev cuam tshuam ntawm DNA. Qhov teeb meem winding ntawm DNA tshwm sim vim qhov cuam tshuam ntawm nws cov qauv ob-helical. Thaum DNA replication thiab transcription, DNA yuav dhau mus ua ntej ntawm ib tug replication diav rawg
Ml yog magnetic quantum tooj, thiab hais txog tus naj npawb ntawm orbitals ib subshell. ml = 2l + 1. ms yog spin quantum tooj, thiab hais txog spin ntawm electron
Xam cov gravitational attraction nruab nrab ntawm ob lub qhov muag yuav tsum tau noj cov khoom ntawm ob pawg thiab dividingbythe square ntawm qhov kev ncua deb ntawm lawv, ces multiplyingthatvalue los ntawm G. Qhov equationisF = Gm1m2/r2
Amoebas yog qhov yooj yim hauv daim ntawv uas muaj cytoplasm ncig los ntawm lub cell membrane. Sab nrauv ntawm cytoplasm (ectoplasm) yog qhov tseeb thiab zoo li gel, thaum sab hauv ntawm cytoplasm (endoplasm) yog granular thiab muaj cov organelles, xws li cov nuclei, mitochondria, thiab vacuoles