Gene qhia yog cov txheej txheem uas cov ntaub ntawv los ntawm cov noob yog siv rau hauv kev sib txuas ntawm cov khoom lag luam gene. Cov khoom no feem ntau yog cov proteins, tab sis nyob rau hauv cov noob caj noob ces tsis muaj protein ntau xws li hloov RNA (tRNA) lossis cov noob me me RNA (snRNA) cov noob, cov khoom lag luam yog RNA ua haujlwm
Nyob rau hauv carboxylic acids thiab lawv cov derivatives, pawg carbonyl txuas mus rau ib qho ntawm cov halogen atoms los yog rau pawg uas muaj atoms xws li oxygen, nitrogen, los yog sulfur. Cov atoms no cuam tshuam rau pawg carbonyl, tsim ib pab pawg ua haujlwm tshiab nrog cov khoom sib txawv
Raws li lub npe qhov txawv ntawm creep andsolifluction yog tias creep yog txav ntawm ib yam dab tsi uas nkag (xws li worms lossis snails) thaum solifluction yog (geology) av creep tshwm sim los ntawm waterlogged av maj mam txav downhill rau saum ib txheej impermeable
Yog tias cov khoom lag luam tsis zoo, ces ob lub vectors taw qhia nyob rau hauv cov lus qhia, orabove 90 thiab tsawg dua los yog sib npaug rau 180 degrees
Cov ntawv sau "synthesis" yog dab tsi? Koj tab tom "synthesizing" koj qhov kev xav ntawm qhov teeb meem nrog cov pov thawj hauv cov peev txheej. Tsis txhob cia li sau cov lus sib cav hauv ntau qhov chaw sib txawv thiab hu rau koj tus kheej cov lus sib cav
TSEEM CEEB TSHAJ PLAWS Astrophysics. Calculus. Computer science. Cosmology. Hluav taws xob thiab hlau nplaum. Physics. Planetary geology. Lub hnub qub qauv thiab evolution
Vertical parabolas muab cov ntaub ntawv tseem ceeb: Thaum lub parabola qhib, lub vertex yog qhov qis tshaj plaws ntawm daim duab - hu ua qhov tsawg kawg nkaus, lossis min. Thaum lub parabola qhib, lub vertex yog qhov siab tshaj plaws ntawm daim duab - hu ua themaximum, lossis max
Cov av qeeg hauv Canterbury ua rau muaj kev hloov pauv tseem ceeb rau ib puag ncig ntuj, suav nrog liquefaction, lateral kis nyob ze ntawm cov dej, kev hloov pauv hauv av, thiab ntau pob zeb ntog thiab av qeeg. Cov huab cua thiab dej tsis zoo kuj raug cuam tshuam, nrog rau cov dej ua si ua si raug tso tseg kom txog thaum lub Kaum Ib Hlis 2011
Ex-urbanisation: Ib txheej txheem uas cov neeg, feem ntau muaj kev vam meej, txav los ntawm lub nroog mus rau qhov chaw nyob deb nroog, tab sis txuas ntxiv tuav txoj hauv kev hauv nroog, los ntawm kev mus los ntev lossis siv thev naus laus zis
Riparian kev poob qis yog cov cuab yeej zoning uas cov zej zog siv los tswj dej nyab, tiv thaiv kev yaig, tiv thaiv vaj tse thiab tswj dej kom zoo. Lawv zoo ib yam li sab thiab pem hauv ntej vaj teeb meem vim lawv tswj qhov chaw ntawm kev tsim kho thiab cuam tshuam cov av cuam tshuam
Txhawm rau nrhiav qhov ntim ntawm lub voos xwmfab no, muab lub hauv paus lub sijhawm ntawm qhov dav lub sijhawm qhov siab. Txhawm rau nrhiav qhov ntim ntawm lub pyramid, siv thaj tsam ntawm lub hauv paus, egin{align*} Khoov{align*} thiab muab nws lub sij hawm qhov siab thiab ces muab nws los ntawm egin{align*}frac{1}{3}end{ align*}
Tsib lub ntsiab lus ntawm thaj chaw yog qhov chaw, qhov chaw, tib neeg-ib puag ncig kev sib cuam tshuam, kev txav mus los, thiab cheeb tsam. Cov ntsiab lus no pab peb nkag siab tias tib neeg thiab qhov chaw sib txuas li cas hauv ntiaj teb. Geographers siv tsib lub ntsiab lus los pab lawv kawm lub ntiaj teb thiab npaj cov tswv yim
Ib lub genome yog ib qho kab mob tag nrho ntawm DNA, suav nrog tag nrho nws cov noob. Txhua lub genome muaj tag nrho cov ntaub ntawv xav tau los tsim thiab tswj lub cev. Nyob rau hauv tib neeg, ib daim qauv ntawm tag nrho cov genome - ntau tshaj 3 billion DNA puag khub - muaj nyob rau hauv tag nrho cov hlwb uas muaj ib tug nucleus
Tus txheeb ze molecular mass/relative formula mass yog txhais raws li qhov sum ntawm tag nrho cov atomic masses ntawm TXHUA tus atoms nyob rau hauv cov mis (Mr). e.g. rau ionic compounds e.g. NaCl = 23 + 35.5 58.5) los yog molecular mass rau covalent cov ntsiab lus los yog cov tebchaw
Acetic acid thiab dej yog polar molecules. Ib yam li ntawd, nonpolar molecules nyiam nyob ib puag ncig los ntawm lwm cov nonpolar molecules. Thaum cov tshuaj polar, zoo li vinegar, yog sib xyaw nrog cov tshuaj tsis muaj polar, zoo li roj, ob qho tib si pib tsim cov emulsion, sib xyaw ntawm cov polar thiab nonpolar compounds
Ib yam dab tsi uas yog ib qho tseem ceeb heev los yog tsim nyog. Yog tias koj yog ib feem tseem ceeb ntawm pab pawg, nws txhais tau tias pab neeg ua haujlwm tsis tuaj yeem ua haujlwm yam tsis muaj koj. Integral yog los ntawm Middle English, los ntawm Medieval Latin integralis 'ua kom tag nrho,' los ntawm Latin integer 'untouched, tag nrho.'
Kev txiav txim siab: Lub molecular geometry ntawm BF3 yog trigonal planar nrog symmetric nqi faib rau hauv nruab nrab atom. Yog li ntawd, BF3 yog nonpolar. Cov lus qhia ntxiv ntawm boron trifluoride (BF3) ntawm wikipedia: Wikipedia Boron Trifluoride
Nqe lus piav qhia: Diammonium hydrogen phosphate yog ib qho inorganic phosphate, yog diammonium ntsev ntawm phosphoric acid. Nws yog ib qho inorganic phosphate thiab ammonium ntsev. CEEB
15 mij Yog li ntawd, lub qhov nyob rau hauv ib lub pob zeb hu ua dab tsi? Pit yog lub npe dav dav rau a qhov nyob rau hauv sedimentary pob zeb uas yog tsim los ntawm huab cua. Cov pits me yog ib yam ntawm alveolar lossis honeycomb weathering, thiab cov pits loj yog hu ua tafoni.
Plaub lub hauv paus nitrogenous uas tsim cov caj qaum ntawm DNA ua khub nrog lub hauv paus ua ke zoo li adenine khub nrog thymine thaum cytosine khub nrog guanine
Cov Ntsiab Cai suav Cov Ntsiab Lus Txhais. Lub Ntsiab Cai Kev suav (tseem hu ua txoj cai suav) yog ib txoj hauv kev los txheeb xyuas cov txiaj ntsig ntawm qhov teeb meem tshwm sim. Yeej, koj muab cov xwm txheej ua ke kom tau txais tag nrho cov txiaj ntsig
Loblolly Pine yog ib tsob ntoo siab, loj hlob sai uas tuaj yeem nyob tau ntau dua 150 xyoo. Feem ntau loj hlob txog 2 feet hauv ib xyoos, tsob ntoo qee zaum siab tshaj 100 ko taw tab sis feem ntau loj hlob li 50 txog 80 feet siab. Nws lub cev upright yog li 3 feet dav thiab npog nrog tuab, furrowed, tawv tawv
Hauv cov tsiaj txhu, Y chromosome muaj cov noob, SRY, uas ua rau kev loj hlob ntawm embryonic li txiv neej. Y chromosomes ntawm tib neeg thiab lwm yam tsiaj txhu kuj muaj lwm cov noob uas xav tau rau kev tsim cov phev
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
Txhua square ntawm lub sij hawm lub sij hawm muab yam tsawg kawg nkaus lub npe ntawm lub caij, nws cov cim, atomic tooj thiab txheeb ze atomic mass (atomic hnyav)
Ob theem ntawm photosynthesis: Photosynthesis yuav siv sij hawm qhov chaw nyob rau hauv ob theem: lub teeb-dependent tshwm sim thiab lub Calvin voj voog (lub teeb-yooj yim tshuaj tiv thaiv). Lub teeb-nyob ntawm cov tshuaj tiv thaiv, uas tshwm sim hauv thylakoid membrane, siv lub teeb lub zog los ua ATP thiab NADPH
Vim hais tias cov khoom tau rov ua dua lawv tus kheej tsis tu ncua, lossis ib ntus, ntawm nws daim ntawv qhia, lub kaw lus tau dhau los ua lub npe hu ua lub sijhawm teem sijhawm. Hauv kev tsim nws lub rooj, Mendeleev tsis ua raws li qhov kev txiav txim ntawm atomic loj. Nws swapped ib co ntsiab nyob ib ncig ntawm
Gamma rays muaj lub zog siab tshaj plaws, qhov luv tshaj wavelengths, thiab cov zaus siab tshaj plaws. Cov xov tooj cua tsis muaj zog, ntawm qhov tod tes, muaj lub zog qis tshaj plaws, qhov ntev tshaj plaws wavelengths, thiab qis tshaj zaus ntawm txhua hom EM hluav taws xob
Molecular geometry yog peb-dimensional kev npaj ntawm cov atoms uas tsim ib lub molecule. Nws suav nrog cov duab dav dav ntawm cov molecule nrog rau qhov ntev ntawm daim ntawv cog lus, daim ntawv cog lus, lub kaum sab xis thiab lwm yam geometrical tsis uas txiav txim siab txoj haujlwm ntawm txhua lub atom
Vertical Angles yog cov ces kaum sib txawv thaum ob kab hla. 'Vertical' nyob rau hauv cov ntaub ntawv no txhais tau hais tias lawv sib koom tib Vertex (kob taw tes), tsis yog lub ntsiab lus ntawm up-down
Thaum nws los txog rau lub zog nws yog kev ua haujlwm los ntawm anobject mus rau qhov khoom uas ua rau nws muaj peev xwm orkinetic zog. Inertia, nyob rau hauv Newtonian physics, piav qhia txog qhov nyiam ntawm ib yam khoom kom nyob twj ywm hauv ib qho kev sib hloov (ntawm qhov ceev tsis tu ncua) lossis thaum so thaum lub zog sab nraud siv rau nws
VIDEO Ib yam li ntawd, puas exponents tshem tawm cov hauv paus square? Qhov ntawd txhais tau tias yog tias koj muaj qhov sib npaug nrog cov hauv paus plaub hau hauv nws, koj tuaj yeem siv qhov "squaring", lossis exponents , tshem tawm cov hauv paus plaub hau .
Prune toyon shrubs txhua lub caij ntuj sov kom tshem tawm cov kev loj hlob thiab cov ntoo tuag. Snip cov suckers los yog cov ceg tuag ntawm lawv qhov chaw ntawm keeb kwm siv pruning txiab. Nyias prune, los yog coppice, toyon shrubs nyob rau hauv lig caij nplooj ntoos hlav txhua txhua ob peb xyoos kom rejuvenate lawv txoj kev loj hlob thiab txhawb ib tug bushier, zoo nkauj dua
Alpha particle, zoo nqi particle, zoo ib yam rau lub nucleus ntawm helium-4 atom, spontaneously emitted los ntawm ib co radioactive tshuaj, muaj ob protons thiab ob neutrons khi ua ke, yog li muaj ib tug loj ntawm plaub units thiab ib tug zoo nqi ntawm ob
Muaj plaub hom fossils, allformed nyob rau hauv ib txoj kev sib txawv, uas yog conducive rau preserving ntau yam kab mob. Cov no yog pwm fossils, cam khwb cia fossils, kab fossils thiab tiag formfossils
Charles Lyell yog ib tus kws tshaj lij geologists hauv keeb kwm. Nws txoj kev xav ntawm uniformitarianism yog ib qho kev cuam tshuam zoo rau Charles Darwin. Lyell theorized tias cov txheej txheem geology uas nyob ib puag ncig thaum pib ntawm lub sijhawm yog tib yam uas tau tshwm sim tam sim no thiab lawv ua haujlwm tib yam
Yog lawm, tus naj npawb ntawm chromosome ntawm zygote, embryonal cell thiab cov neeg laus ntawm ib lub cev yog ib txwm nyob tas li. Qhov no ua rau muaj pes tsawg tus chromosomes tau txais ib nrab ntawm gametes. Thaum fertilization tshwm sim, tus naj npawb ntawm chromosomes yuav sib npaug zos rau hauv somatic hlwb
Lub acceleration yog sib npaug rau net force faib los ntawm pawg. Yog hais tias lub net quab yuam ua rau ib yam khoom doubles, nws acceleration yog doubled. Yog hais tias qhov loj yog ob npaug, ces acceleration yuav halved. Yog tias ob qho tib si lub zog thiab qhov hnyav yog ob npaug, qhov nrawm yuav tsis hloov pauv
Qee qhov tsis zoo, lossis kev pheej hmoo, uas los ntawm kev kuaj caj ces tuaj yeem suav nrog: Kev kuaj yuav ua rau muaj kev ntxhov siab thiab ntxhov siab rau qee tus neeg. Kev ntsuam xyuas tsis tshem tawm ib tus neeg txoj kev pheej hmoo rau mob qog noj ntshav. Cov txiaj ntsig hauv qee qhov xwm txheej yuav rov qab tsis meej lossis tsis meej
Ntxiv Fractions Kauj Ruam 1: Xyuas kom cov lej hauv qab (tus denominators) yog tib yam. Kauj Ruam 2: Ntxiv cov lej saum toj kawg nkaus (tus lej), muab cov lus teb ntawd hla tus lej. Kauj ruam 3: Simplify tus feem (yog xav tau)