Ammonium nitrate, yog xim tsis muaj xim rhombic lossis monoclinic siv lead ua nyob rau hauv chav tsev kub. Nws tuaj yeem decomposed rau hauv dej thiab nitrous oxide ntawm 210 ° C. Nws yog soluble hauv dej, methanol thiab ethanol
Xws li kev sib cuam tshuam khub yog lwm qhov piv txwv ntawm Newton's Third Law. Baseball yuam tus puav nyob rau hauv ib qho kev taw qhia thiab tus puav yuam lub pob nyob rau hauv qhov opposite direction. Ob lub zog tsim ib qho kev sib cuam tshuam ntawm cov khoom sib txawv thiab sib npaug ntawm lub zog thiab qhov sib txawv ntawm kev coj
Qhov zaus ntawm lub suab tsis yog ntsuas hauv hertz (Hz), lossis tus naj npawb ntawm cov nthwv dej uas dhau qhov taw tes ruaj khov hauv ib thib ob. Tib neeg ib txwm tuaj yeem hnov suab nrog qhov zaus ntawm 20 Hz thiab 20,000 Hz. Lub suab nrog zaus qis dua 20 hertz yog hu ua infrasound
Stylistic seriation CATEGORY: txheej txheem. DEFINITION: Lub koom haum ntawm artifacts los yog lwm yam ntaub ntawv los ntawm ib theem zuj zus raws li cov kev hloov nyob rau hauv lub sij hawm nyob rau hauv lawv cov cwj pwm stylistic, ib tug txheeb ze txoj kev txiav txim siab hnub nyoog. Tso cov txiaj ntsig ntxiv. Ford, James Alfred (1911-1968) CATEGORY: neeg
Nws siv lub hauv paus ntsiab lus ntawm kev sib nrig sib inductance kom paub qhov AC ncaj qha los ntawm tam sim no, cais cov AC tam sim no, thiab tso tawm ib txwm qhib lossis ib txwm kaw cov teeb liab hloov mus ncaj qha tswj ntau yam khoom siv automation, xws li flash, buzzer, relay, single-chip los yog lwm yam khoom siv fais fab
Accuracy_score (y_true, y_pred, normalize=True, sample_weight=None)[source] Cov qhab nia kev faib tawm qhov tseeb. Hauv kev faib tawm ntau lub npe, qhov ua haujlwm no suav qhov tseeb qhov tseeb: cov txheej txheem ntawm cov ntawv twv kwv yees rau ib tus qauv yuav tsum ua raws nraim li cov kab ntawv sib txuas hauv y_true
Piv txwv ntawm electromagnetic tsis muaj xws li xov tooj cua tsis, microwaves, infrared, pom lub teeb, ultraviolet, x-rays, thiab gamma rays. Xov tooj cua tsis muaj lub zog qis tshaj plaws thiab zaus thiab qhov ntev tshaj plaws wavelength
Cov tshuab hnyav tau cais cov fluorene thiab 9-fluorenone raws li lawv qhov sib txawv ntawm cov qauv thiab polarity. Nyob rau hauv txoj cai, cov tshuaj compound uas ntws los ntawm kem ntawm ib tug ceev ceev yog ntau tsis-polar; Yog li ntawd, nyob rau hauv cov ntaub ntawv no fluorene yog ntau tsis-polar tshaj 9-fluorenone
Temperate grasslands yog characterized li muaj nyom raws li cov zaub tseem ceeb. Ntoo thiab tsob ntoo loj tsis tuaj. Qhov kub thiab txias sib txawv ntawm lub caij ntuj sov mus rau lub caij ntuj no, thiab cov dej nag tsawg dua hauv cov nyom nyom dua li savannas. Temperate grasslands muaj kub lub caij ntuj sov thiab lub caij ntuj no txias
Rau binary ionic compounds (ionic compounds uas tsuas muaj ob hom ntawm cov ntsiab lus), cov tebchaw muaj npe los ntawm kev sau lub npe ntawm cov cation ua ntej tom qab lub npe ntawm cov anion
Choanoflagellates yuav luag zoo tib yam hauv cov duab thiab ua haujlwm nrog choanocytes, lossis dab tshos hlwb, ntawm daim txhuam cev; Cov hlwb no tsim ib qho tam sim no uas rub cov dej thiab cov khoom noj los ntawm lub cev ntawm daim txhuam cev, thiab lawv lim tawm cov khoom noj nrog lawv cov microvilli
Alkane kub hnyiab nrog cov nplaim xiav los yog huv si vim tsis tiav combustion ntawm saturated hydrocarbon hauv huab cua
Lub valence electrons tam sim no nyob rau hauv graphite tuaj yeem txav tau yooj yim thiab yog li, lawv tuaj yeem ua hluav taws xob. Aselectrodes kuj tso cai rau cov hluav taws xob tam sim no hla lawv (uas yog tsim los ntawm cov neeg xyuas pib zoo) hauv cov hluav taws xob, yog li ntawd, graphite yog siv los ua cov electrodes inelectric hlwb
Slate khoom hnyav 2.691 gram ib cubic centimeter los yog 2 691 kilogram ib cubic meter, piv txwv li qhov ceev ntawm slate khoom yog sib npaug rau 2 691 kg / m³
Cov txee hauv chav kuaj yuav tsum muaj daim di ncauj tsa ntawm ntug sab nrauv kom tsis txhob ntim cov khoom poob. Tsis txhob cia lub thawv dai ntawm ntug ntawm lub txee! Cov kua dej los yog cov tshuaj corrosive yuav tsum tsis txhob muab khaws cia rau ntawm cov txee saum qhov muag. Cov thawv iav yuav tsum tsis txhob kov ib leeg ntawm lub txee
Nyob ntawm thaj tsam li 70 mais sab qaum teb ntawm Sacramento ntawm qhov sib txuas ntawm peb rab diav rawg ntawm Feather River, Oroville Dam yog lub pas dej hauv av (suav nrog cov tub ntxhais tsis muaj zog uas nyob ib puag ncig los ntawm cov xuab zeb, pob zeb, thiab cov khoom siv pob zeb) uas tsim tau ib lub reservoir uas muaj peev xwm tuav tau 3.5 lab. acre-foot dej
Cov nplaim taws hla lub voj voog pictogram yog siv rau cov chav kawm thiab pawg hauv qab no: Oxidizing gases (Qeb 1)
Aluminium Hydrogen Carbonate Al (HCO3) 3 Molecular Luj - EndMemo
Ib hom tshiab tuaj yeem tsim tau thaum ib pab pawg neeg tseem nyob ib leeg los ntawm lwm tus ntawm nws cov hom ntev txaus los hloov cov yam ntxwv sib txawv. Cov tswv cuab ntawm hom yuav tsis muaj kev hloov pauv uas tso cai rau lawv kom muaj sia nyob thiab rov tsim dua tshiab hauv qhov chaw hloov pauv
Cov ntoo raug tsim txom los ntawm kev sib xyaw ua ke ntawm kev hloov pauv huab cua, hom kab mob thiab kev hloov pauv hauv kev siv av, tus neeg hav zoov hauv xeev Scott Josiah tau hais. Ntau cov ntoo uas ploj lawm yog ib txwm nyob rau Nebraska, thaum lwm tus yog cov kab txawv cog raws li qhov tshwm sim ntawm kev sib haum xeeb
Qhov sib txawv ntawm cov hluav taws xob hluav taws xob muaj nyob hauv cov hluav taws xob hluav taws xob muaj xws li xov tooj cua tsis muaj zog, microwaves, infrared tsis, pom lub teeb, ultraviolet hluav taws xob, X-rays, thiab gamma rays. Ib feem ntawm cov electromagnetic spectrum uas peb tuaj yeem pom yog qhov pom lub teeb spectrum
N-Bromosuccinimide los yog NBS yog cov tshuaj reagent siv nyob rau hauv radical hloov, electrophilic ntxiv, thiab electrophilic hloov cov tshuaj tiv thaiv nyob rau hauv cov organic chemistry. NBS tuaj yeem yog qhov yooj yim ntawm Br•, bromine radical
Lus Txhais: Ib pawg ntawm cov ntaub ntawv tau hais kom ua tas mus li yog tias qhov tseem ceeb ntawm cov txheej txheem tuaj yeem siv rau txhua tus nqi hauv ib lub sijhawm luv lossis tsis kawg. Lus Txhais: Ib pawg ntawm cov ntaub ntawv tau hais tias yuav tsum tsis txhob sib cais yog tias qhov tseem ceeb ntawm cov txheej txheem yog qhov sib txawv thiab sib cais (qhov tsis sib xws)
Ntawm qhov ntsuas kub thiab siab, oxygen pom tau tias yog cov pa roj uas muaj ob lub pa oxygen atom, tshuaj formula O2
Yog li, txhawm rau txheeb xyuas yog tias koj lub ntsuas dej ntsuas ntsuas qhov tseeb ntawm dej, tsuas yog ntab nws hauv dej ntshiab (dej lossis rov qab osmosis dej) ntawm qhov kub thiab txias. Tuav lub hydrometer kom tshem tawm cov npuas uas yuav clinging rau nws thiab nqa lub thawv ntsuas mus rau qhov muag
Solvent Polarity Index Boiling Point Heptane 0.1 98.4 Hexane 0.1 68.7 Cyclohexane 0.2 80.7 Toluene 2.4 110.6
Lub caij nyoog ntawm kev nrhiav ib lub meteorite uas nyuam qhuav ntog tseem me dua. Txij li thaum xyoo 1900, cov naj npawb ntawm cov meteorite ' ntog' yog txog 690 rau tag nrho lub ntiaj teb. Qhov ntawd yog 6.3 toj ib xyoo
Cov hom no yog cov kab mob Thermus aquaticus, pom nyob rau hauv cov dej kub ntawm Yellowstone. Los ntawm cov kab mob no tau raug cais tawm Taq polymerase, lub tshav kub-resistant enzyme tseem ceeb rau DNA-amplification txheej txheem dav siv hauv kev tshawb fawb thiab kev kuaj mob (saib cov tshuaj tiv thaiv kab mob polymerase)
Enzyme assay Enzyme assay yog txoj hauv kev kuaj rau kev ntsuas kev ua haujlwm enzymatic. Qhov kom muaj nuj nqis lossis concentration ntawm ib qho enzyme tuaj yeem qhia tau nyob rau hauv cov nyiaj molar, xws li nrog rau lwm yam tshuaj, lossis hais txog kev ua haujlwm hauv enzyme units. Kev ua enzyme = moles ntawm substrate hloov dua siab tshiab rau ib chav tsev lub sij hawm = tus nqi × cov tshuaj tiv thaiv ntim
Cov txheej txheem uas peb tuaj yeem cais cov khoom ntawm cov tshuaj colloidal hu ua Centrifugation
Topography yog cov duab ntawm lub ntiaj teb nto thiab nws lub cev nta. Topography yog tas li reshaped los ntawm huab cua, yaig, thiab deposition. Huab cua yog hnav ntawm pob zeb lossis av los ntawm cua, dej, lossis lwm yam ua rau ntuj tsim. Sediment yog daim ntawm lub ntiaj teb nto uas tau tawg lawm
DNA yog cov ntaub ntawv molecule. Nws khaws cov lus qhia ua rau lwm cov molecules loj, hu ua cov proteins. Cov lus qhia no tau khaws cia rau hauv txhua lub hlwb, faib ntawm 46 cov qauv ntev hu ua chromosomes. Cov chromosomes no yog tsim los ntawm ntau txhiab ntu luv ntawm DNA, hu ua noob
Qee lub sij hawm, qhov chaw mos rau saum koj tus menyuam lub taub hau yuav zoo li pulsating. Tsis tas yuav txhawj xeeb - qhov kev txav no zoo li qub thiab tsuas yog qhia txog qhov pom pom ntawm cov ntshav uas sib haum rau koj tus menyuam lub plawv dhia
Pob zeb diamond yog ib qho allotrope / daim ntawv ntawm carbon. Yog li, carbon (nyob rau hauv daim ntawv ntawm pob zeb diamond) yog tib yam uas tsis yog-hlau uas muaj heev melting point
Lo lus precision kuj tseem siv tau los piav txog qib ntawm kev nthuav dav uas ntsuas ntsuas tau. Piv txwv li, ib tug pas ntsuas cim nyob rau hauv kaum rau ntawm ib nti yog hais tias yuav tsum 'ntxhais' ntau tshaj li tus pas ntsuas cim nyob rau hauv kaum ntawm ib nti. Yog tias koj ntsuas qhov ntev yog 4.3 cm
Ob qho tseem ceeb tshaj plaws ntawm lub zog nqa lub cev yog cov piam thaj thiab ATP (adenosine triphosphate). Cov no yog cov roj hluav taws xob ze li thoob ntiaj teb thoob plaws ntiaj teb thiab ob qho tib si tseem yog cov neeg tseem ceeb hauv photosynthesis
Muaj nuj nqi. Cisternae ntim thiab hloov cov proteins thiab polysaccharides. Biosynthetic cargo proteins taug kev los ntawm cisternae thiab undergo glycan remodeling thiab lwm yam kev hloov kho. Cisternae ntim cov proteins thiab xa mus rau cov neeg nqa khoom thauj
Gregor Mendel tau kawm txog 30,000 pea nroj tsuag hauv 8 xyoo. nws txiav txim siab los kawm txog keeb kwm vim nws tau ua haujlwm hauv lub vaj thiab pom qhov txawv ntawm cov nroj tsuag thiab xav paub. Vim li cas nws thiaj kawm tau cov txiv ntoo? Nws tau kawm cov txiv laum huab xeeb vim tias lawv tus kheej pollinating, lawv loj hlob sai, thiab lawv muaj ntau yam zoo
Ib qho kev sib txuas ntawm cov kab sib txuas tuaj yeem ua tsis sib xws lossis tsis sib xws. Yog hais tias cov kab nyob rau hauv lub system muaj tib txoj kab nqes tab sis txawv intercepts ces lawv tsuas yog inconsistent. Txawm hais tias lawv muaj tib txoj kab nqes thiab cuam tshuam (hauv lwm lo lus, lawv yog tib txoj kab) ces lawv muaj kev vam khom
HETP tshwm sim los ntawm tib lub tswv yim ntawm cov theem sib npaug raws li lub phaj theoretical thiab yog cov lej sib npaug ntawm qhov nqus txaj ntev muab faib los ntawm tus lej ntawm cov phiaj xwm theoretical hauv lub txaj nqus (thiab hauv kev xyaum yog ntsuas hauv txoj kev no)