Cov pa oxygen atom tiag tiag ua rau cov nyhuv electron rho tawm inductive, tab sis cov khub ib leeg ntawm cov pa ua rau muaj qhov cuam tshuam tsis zoo - pawg methoxy yog ib pab pawg neeg pub dawb los ntawm kev cuam tshuam
Ib qho electrophilic bromine radical ntxiv rau alkene los tsim cov 2o radical. Tsis tu ncua Radical Conditions HBr (tsaus, N2 cua) HBr (peroxides, uv teeb) Electrophile H + Br. Nruab nrab carbocation radical Regioselectivity Markovnikov Anti-Markovnikov
Tus tsim tawm tsis muaj dej yuav tsum tau siv rau qhov ziab kom huv si los ua ib qho me ntsis translucent dawb txheej
Teb Cov Kws Tshaj Lij Tshaj Tawm Tom qab ntawd cov khoom ib nrab yog: 7 * 5 = 35 thiab 7 * 30 = 210, yog li cov khoom lag luam tag nrho yog cov lej ntawm cov khoom ib nrab: 35 + 210 = 245
Quantitative Versus Qualitative Analysis Qualitative analysis qhia 'dab tsi' nyob rau hauv ib qho piv txwv, thaum kev soj ntsuam ntau yog siv los qhia 'ntau npaum li cas' hauv ib qho qauv. Ob hom kev tshuaj ntsuam feem ntau siv ua ke thiab suav tias yog piv txwv ntawm kev tshuaj ntsuam chemistry
Qhov chaw sab nraud, lossis qhov chaw yooj yim, yog qhov dav uas muaj nyob thoob plaws ntiaj teb thiab nruab nrab ntawm lub cev xilethi-aus. Qhov chaw intergalactic siv feem ntau ntawm lub ntim ntawm lub ntiaj teb, tab sis txawm tias galaxies thiab lub hnub qub nruab nrog yuav luag tag nrho ntawm qhov chaw khoob. Qhov chaw sab nrauv tsis pib ntawm qhov siab kawg nkaus saum lub ntiaj teb saum npoo av
Txawm hais tias cov nthwv dej saum npoo mus qeeb dua S-yoj, lawv tuaj yeem loj dua hauv amplitude thiab tuaj yeem yog hom kev puas tsuaj tshaj plaws ntawm seismic yoj. Muaj ob hom kev nthwv dej saum npoo av: Rayleigh nthwv dej, tseem hu ua av yob, taug kev raws li ripples zoo ib yam li cov dej saum npoo av
Sudbury ib txwm muaj lub npe hu ua lub nroog mining. Nws thawj lub tuam txhab mining, Canadian tooj liab, tau tsim nyob rau hauv 1886 thiab pib smelting ua hauj lwm nyob rau hauv 1888
Yog tias koj tsuas yog yuav khaws nws qee hnub lossis lub lis piam, ces nws yuav tsum zoo yog tias nws nyob hauv qhov tsaus ntuj, qhuav, airtight thiab qhov chaw txias. Yog hais tias koj nyob nraum sorting nws xyoo, ces lub freezer yuav yog qhov zoo tshaj plaws qhov chaw. Nyob rau hauv chav tsev kub, degreedation yog heev qeeb, yog li ib tug txias chav tsev, tawm ntawm lub hnub yog feem ntau txaus los txo qhov kev puas tsuaj
Kev ntxhov siab hauv dej hauv pines tuaj yeem ua rau koob tuag. Cov ceg qis tuaj yeem tuag los ntawm kev ntxhov siab hauv dej txhawm rau ua kom lub neej ntev ntawm tsob ntoo. Nws tuaj yeem tua koj cov ntoo. Kab mob - Yog tias koj pom cov ceg qis ntawm tsob ntoo ntoo tuag, koj tsob ntoo tej zaum yuav muaj Sphaeropsis tip blight, kab mob fungal, lossis lwm yam kab mob
Qhov qub txeeg qub teg ntawm cov cim tswj los ntawm cov noob muaj nyob rau hauv lub cell cytoplasm es tsis yog los ntawm cov noob ntawm chromosomes nyob rau hauv lub cell nucleus. Ib qho piv txwv ntawm cytoplasmic qub txeeg qub tes yog tswj los ntawm mitochondrial noob (saib mitochondrion)
Kev txiav txim siab seb koj nyob rau sab qaum teb lossis sab qab teb Hemisphere yog ib qho yooj yim - tsuas yog nug koj tus kheej yog tias txoj kab nruab nrab yog sab qaum teb lossis sab qab teb ntawm koj txoj haujlwm. Qhov no qhia koj txog koj qhov hemisphere longitudinal vim tias Northern Hemisphere thiab Southern Hemisphere muab faib los ntawm kab zauv
A. Electrolytic npib tsib xee yog tso siv DC tam sim no, thaum Electroless Ni yog autocatalytic deposition. Electroless Ni ua rau plating ntawm cov tuab tuab thoob plaws hauv ib feem, thaum electrolytic Ni daim hlau ua kom tuab dua nyob rau hauv qhov chaw siab tam sim no
Photosynthesis yog cov txheej txheem uas cov nroj tsuag thiab lwm yam ua zaub mov. Nws yog ib qho endothermic (siv cua sov) cov txheej txheem tshuaj uas siv lub hnub ci tig carbon dioxide rau hauv cov suab thaj uas lub xov tooj ntawm tes siv tau los ua lub zog. Raws li cov nroj tsuag, ntau hom algae, protists thiab kab mob siv nws kom tau zaub mov
Yog li, 7/8 yog qhov yooj yim feem rau 21/24 los ntawm kev siv GCD lossis HCF txoj kev. Yog li, 7/8 yog qhov yooj yim feem rau 21/24 los ntawm kev siv cov txheej txheem prime factorization
Marble yog cov pob zeb metamorphic uas muaj cov pob zeb hauv cov carbonate, feem ntau yog calcite lossis dolomite. Nyob rau hauv geology, lub sij hawm marble hais txog metamorphosed limestone, tab sis nws siv nyob rau hauv stonemasonry ntau broadly encompasses unmetamorphosed limestone. Marble feem ntau yog siv rau cov duab puab thiab ua cov khoom siv hauv tsev
Txhua qhov subatomic particle nyob qhov twg hauv lub atom? Protons thiab neutrons nyob rau hauv lub nucleus, ib tug ntom nruab nrab core nyob rau hauv nruab nrab ntawm lub atom, thaum lub electrons nyob rau sab nraum lub nucleus
Cov pa oxygen yog yaj hauv dej, ib yam li ntsev tuaj yeem yaj. Nws tsis (rau ib qho txiaj ntsig zoo) ua ke nrog cov dej molecules los tsim hydrogen peroxide. Yog vim li cas cov dej oxygenated tsis fizzy zoo li dej qab zib (CO2) yog solubility ntawm oxygen hauv dej yog li 2% ntawm CO2
Lub geosphere muaj plaub lub subsystems hu ua lithosphere, hydrosphere, cryosphere, thiab cua. Vim tias cov subsystems cuam tshuam nrog ib leeg thiab biosphere, lawv ua haujlwm ua ke los cuam tshuam rau huab cua, ua rau cov txheej txheem geological, thiab cuam tshuam rau lub neej thoob plaws ntiaj teb
Kev piav qhia. Manhole npog feem ntau yog ua los ntawm cov hlau cam khwb cia, pob zeb los yog ua ke ntawm ob. Qhov no ua rau lawv pheej yig, muaj zog, thiab hnyav, feem ntau hnyav dua 113 kilograms (249 lb)
Kev piav qhia: Muaj cov zaub mov txawv rau kev ua si-dough hauv lub vev xaib. Kev sib cais ntawm ntsev hauv dej yog qhov kev hloov tshuaj lom neeg; khob noom cookie (cov hmoov nplej thiab dej) yeej muaj cov tshuaj hloov pauv thaum koj ua noj
Mitosis. Yog li, nyob rau hauv Mitosis cell division, ob tug ntxhais lub hlwb yeej ib txwm muaj tib tus naj npawb ntawm chromosomes raws li niam txiv cell los ntawm lawv muab tau. Lawv lub luag haujlwm yog tswj kom muaj pes tsawg tus chromosomes nyob rau hauv txhua lub cell faib tsis tu ncua, ua rau peb loj hlob thiab tswj peb lub cev
Nyob rau hauv cov cim, lub enthalpy, H, sib npaug cov sum ntawm lub internal zog, E, thiab cov khoom ntawm lub siab, P, thiab ntim, V, ntawm lub system: H = E + PV. Raws li txoj cai ntawm kev txuag hluav taws xob, kev hloov pauv hauv lub zog sab hauv yog sib npaug ntawm cov cua sov hloov mus rau, tsawg dua cov haujlwm ua los ntawm, lub kaw lus
Tej zaum koj yuav tau pom creosote cheb cav ntawm cov rhawv ntawm cov khw muag khoom loj thiab xav paub seb lawv puas ua haujlwm tiag. "Yog tias koj hlawv lub creosote cheb cav ua ntej, nws qhuav cov creosote, tso cai rau cov hmoov av tau yooj yim poob rau hauv lub firebox, thiab ua kom cov hluav taws kub tom ntej muaj kev nyab xeeb thiab cheb qhov kev ntxuav tom ntej yooj yim dua."
Cov kev hloov pauv raws li qhov ntsuas tus cwj pwm ntawm cov neeg koom. Lawv vam khom vim lawv "nyob ntawm" yam uas cov neeg koom ua. Cov piv txwv pom tseeb tshaj plaws yog cov ntawv nkag ceev, ntsuas, piv txwv li, hauv cov lus ib feeb
Ib qho tseem ceeb hauv oceanography tsom - pom tseeb - ntawm dej hiav txwv. Thaj chaw ntawm dej hiav txwv-zoo li dej hiav txwv lawv tus kheej-yog nplua nuj heev, thiab qee qhov kev pab cuam yuav hais kom koj tsom mus rau ib qho chaw tshwj xeeb. Cov kev tshwj xeeb tuaj yeem suav nrog kev ua dej hiav txwv lom neeg, dej hiav txwv tshuaj lom neeg, dej hiav txwv geology, thiab lub cev dej hiav txwv
Tus kws sau ntawv, Eckard Specht, kuj koom nrog hauv kev tshawb nrhiav kev daws teeb meem, thiab qhov tseeb, feem ntau cov kev daws teeb meem tau pom los ntawm nws, thiab muaj cov kev daws teeb meem txog li 2600 lub voj voog nyob rau hauv ib lub voj voog loj, nrog rau cov duab layouts. Rau txhua lub voj voog qhov piv ntawm r / R tau muab, thiab qhov no tuaj yeem siv los nrhiav cov lus teb
Cov kab hauv qab: Qhov loj ntawm kev ua haujlwm rau cov txheej txheem isothermal rau ob qho tib si nthuav thiab compression yog ntau dua qhov loj ntawm kev ua haujlwm rau cov txheej txheem adiabatic. Txawm hais tias kev ua haujlwm ntawm adiabatic compression tsis zoo dua li kev ua haujlwm isothermal compression, qhov kev ua haujlwm tsuas yog nyob ntawm nws qhov loj
32 twb nyob rau hauv daim ntawv yooj yim. Nws tuaj yeem sau ua 1.5 hauv daim ntawv lej (thov mus rau 6 tus lej lej)
Lub geology ntawm Grand Canyon cheeb tsam suav nrog ib qho ntawm cov ua tiav thiab kawm tiav ntawm pob zeb hauv ntiaj teb. Ze li ntawm 40 lub pob zeb loj sedimentary nthuav tawm hauv Grand Canyon thiab hauv Grand Canyon National Park thaj tsam muaj hnub nyoog li ntawm 200 lab mus txog ze li 2 billion xyoo
Thaum lub meteoroid, comet, lossis asteroid nkag mus rau hauv lub ntiaj teb qhov chaw ntawm qhov ceev feem ntau tshaj 20 km / s (72,000 km / h; 45,000 mph), aerodynamic cua sov ntawm cov khoom ntawd ua rau lub teeb ci, ob qho tib si los ntawm cov khoom ci thiab cov txoj kev ntawm glowing hais tias nws tawm hauv nws sawv
Ib qho tshuaj tiv thaiv yog xav txog tus kheej thaum nws tuaj yeem cuam tshuam nrog lwm lub ntsiab lus ntawm nws tus kheej, yam tsis muaj kev pab los ntawm lub catalyst. Delta G yog lub cim rau spontaneity, thiab muaj ob yam uas yuav cuam tshuam rau nws, enthalpy thiab entropy. Thaum delta G < 0 - Nws yog qhov tshwm sim ntawm tus kheej. Thaum delta G = 0 - Nws yog nyob rau hauv equilibrium
Sulfur yog siv los ua hmoov phom, ntais ntawv, phosphate, tshuaj tua kab, fungicides, thiab tshuaj, thiab nyob rau hauv vulcanizing roj hmab thiab impregnating ntoo thiab ntawv cov khoom
Homer zaj dab neeg, uas muaj cov ntsiab lus tseem ceeb xws li kev cuam tshuam ntawm Space Haiv neeg, kev hlub niam txiv, thiab tus kheej vs. Homer tau txiav txim siab los tsim foob pob hluav taws thiab tau txais nws niam nws txiv kev hwm hauv cov txheej txheem
Kev nce cov tshuaj tiv thaiv ntawm cov tshuaj tiv thaiv kab mob tso cai rau cov tshuaj tiv thaiv kom ua tau zoo dua, thiab yog li ntau cov khoom tsim tawm ntawm tus nqi nrawm dua. Qhov no yog lub npe hu ua catalytic efficiency ntawm enzymes, uas, los ntawm kev nce tus nqi, ua rau cov tshuaj muaj txiaj ntsig zoo hauv cov kab mob lom
Ib qho txiaj ntsig tseem ceeb ntawm Raman spectra tshaj infrared nyob rau hauv qhov tseeb tias dej tsis cuam tshuam, qhov tseeb, Raman spectra tuaj yeem tau txais los ntawm cov kev daws teeb meem aqueous. 12.? Dej tuaj yeem siv los ua cov kuab tshuaj. ? Zoo heev rau cov qauv tshuaj lom neeg hauv lub xeev (vim tias dej tuaj yeem siv los ua hnyav)
KEV PAB CUAM NTAWM PERCENT HYDRATION: Qhov sib txawv ntawm ob pawg yog qhov loj ntawm cov dej poob. Faib qhov loj ntawm cov dej poob los ntawm qhov qub loj ntawm hydrate siv yog sib npaug rau feem ntawm cov dej hauv qhov sib xyaw. Muab cov feem no los ntawm 100 muab qhov feem pua ntawm cov dej hauv cov hydrate
Ib qho kev ntsuas ntawm kev sib koom ua ke ntsuas qhov kev sib raug zoo ntawm kev sib kis thiab kab mob ntawm ob pawg. Piv txwv ntawm kev ntsuas ntawm kev koom tes muaj xws li kev pheej hmoo ntawm kev pheej hmoo (tus txheeb ze kev pheej hmoo), tus nqi sib piv, qhov sib txawv ntawm qhov sib txawv, thiab qhov sib piv ntawm kev tuag
Ua ntej sib tham txog pH peb yuav tsum nkag siab txog tus cwj pwm sib npaug ntawm dej. Lub equilibrium tas li, Kw, yog hu ua dissociation tas li los yog ionization tas li ntawm dej. Hauv dej ntshiab [H+] = [OH-] = 1.00x10-7 M. pH thiab pOH. Ua hauj lwm nrog cov lej xws li 1.00x10-7 M los piav txog qhov kev daws teeb meem nruab nrab yog qhov tsis txaus ntseeg
Lub dilation yog ib qho kev hloov pauv uas tsim cov duab uas zoo ib yam li qhov qub, tab sis yog qhov sib txawv. Ib tug dilation stretches los yog shrinks tus thawj daim duab. • Cov lus piav qhia ntawm qhov dilation suav nrog qhov ntsuas qhov ntsuas (lossis qhov piv) thiab qhov nruab nrab ntawm qhov dilation