Variability hauv Statistics yog dab tsi? Variability (tseem hu ua kis los yog dispersion) yog hais txog kev nthuav tawm cov ntaub ntawv li cas. Variability muab txoj hauv kev los piav qhia ntau npaum li cas cov ntaub ntawv sib txawv thiab tso cai rau koj siv cov txheeb cais los sib piv koj cov ntaub ntawv rau lwm cov ntaub ntawv
Chav ntsuas Volume = ntev x dav x qhov siab. Koj tsuas yog yuav tsum paub ib sab kom paub qhov ntim ntawm lub voos xwmfab. Cov ntsuas ntsuas rau ntim yog cubic units. Volume yog nyob rau hauv peb-dimensions. Koj tuaj yeem muab cov sab hauv txhua qhov kev txiav txim. Sab twg koj hu ntev, dav, lossis qhov siab tsis muaj teeb meem
Atmospheric Pressure: cuam tshuam rau huab cua tuab npaum li cas, txiav txim siab npaum li cas rub lub projectile yuav tsum ya mus, cuam tshuam rau nws qhov ntau. Kub: Ib yam li atmospheric siab. Cua: Nyob ntawm qhov ceev thiab kev taw qhia, tuaj yeem ua rau qhov projectile tuaj txog hauv qhov chaw nws tsis muaj kev lag luam nyob hauv
Tsis txhob pleev xim rau tag nrho cov caliper ntawm lub tsheb. Xim rau ntawm qee qhov chaw tuaj yeem ua rau lub caliper txeeb. Nres calipers tuaj yeem kub dua lub cav, yog li cov xim zoo yog qhov tseem ceeb. Qee cov xim epoxy ob feem yog siv nrog txhuam ua haujlwm zoo thiab kav ntev
Cov no yog hav zoov, nyom, dej tshiab, marine, suab puam, thiab tundra. Lwm cov kws tshawb fawb siv cov kev faib tawm meej dua thiab sau ntau ntau ntawm biomes sib txawv. Piv txwv li, lawv xav txog ntau hom hav zoov los ua biomes sib txawv. Tropical rain forests uas sov thiab ntub txhua xyoo yog ib qho biome
30-85 cm siab
Qhov loj ntawm ib vector muab nyob rau hauv daim ntawv tivthaiv yog muab los ntawm lub hauv paus square ntawm cov sum ntawm cov squares ntawm txhua feem ntawm lub vector. i.e muab lub vector V(p, q), qhov loj ntawm vector yog muab los ntawm |V| = sqrt(p^2 + q^2)
Niels Bohr tau npaj Bohr Model ntawm Atom hauv xyoo 1915. Bohr Model yog ib qho qauv ntawm lub ntiaj teb uas cov electrons tsis zoo orbit ib tug me me, zoo nqi nucleus zoo ib yam li cov ntiaj chaw orbiting lub hnub (tshwj tsis yog lub orbits tsis yog planar)
Tig qhov ntsuas tawm ces nias thiab tuav lub 'Mode' thiab 'Tare' cov yawm sij ib txhij. Thaum tuav 'Mode' thiab 'Tare', tig lub hwj chim rov qab rau. Txuas ntxiv tuav ob lub nyees khawm kom txog thaum koj pom cov lej lossis cov lus uas qhia tias koj tuaj yeem txuas ntxiv mus
Qhov teeb meem yog txhua yam nyob ib puag ncig koj. Atoms thiab cov tebchaw yog tag nrho ua los ntawm qhov me me ntawm cov teeb meem. Cov atoms mus ua tej yam uas koj pom thiab kov txhua hnub. Matter txhais tau tias yog txhua yam uas muaj huab hwm coj thiab siv qhov chaw (nws muaj ntim). Volume yog tus nqi ntawm qhov chaw ib yam dab tsi occupies
Nco ntsoov tias Mountain-Ash berries tsis noj tshiab. Lawv iab heev thiab siab nyob rau hauv tanin, thiab lawv ncaj ncees tsis saj zoo heev. Tab sis cov noog hlub lawv tshiab, thiab lawv ua cov zaub mov zoo rau lub caij txias rau cov noog raws li cov berries dai ntawm tsob ntoo ntev rau lub caij ntuj no
Norway Spruce - Nruab Qhov siab hauv ko taw Tus nqi qis kawg nkaus 6 - 7 $ 179.95 txhua 10 tsob ntoo 7 - 8 $ 199.95 txhua 10 tsob ntoo 8 - 9 $ 249.95 txhua 10 tsob ntoo
Ntau lub roob hluav taws hauv New Mexico tau tsim los ntawm Rio Grande rift, Fischer tau hais. Lub crust ntawm qhov rift yog thinner, ua geological kev ua ub no muaj kev cuam tshuam ntau dua rau saum npoo av. Ntawm no, magma yog ze rau ntawm qhov chaw
Qhov sib npaug yooj yim rau kev txiav txim siab kub ntawm qhov kev daws teeb meem: delta T = mKb. Delta T yog hais txog qhov kub ntawm qhov nce siab, lossis ntau npaum li cas qhov kev daws qhov boiling point yog ntau dua li cov kuab tshuaj ntshiab. Cov units yog degrees Celsius. Kb yog molal boiling point elevation tas li
NADH tsim 3 ATP thaum lub sij hawm ETC (Electron Transport Chain) nrog oxidative phosphorylation vim NADH muab nws cov hluav taws xob rau Complex I, uas yog nyob rau theem siab dua li lwm cov Complexes. FADH2 tsim 2 ATP thaum lub sij hawm ETC vim nws muab nws cov electron rau Complex II, bypassing Complex I
Cov molar loj ntawm H2SO4 yog 98. Cov lus piav qhia raws li H = 1 × 2 = 2, S = 32, O = 16 × 4 = 64 Qhov sib ntxiv ntawm cov no yuav muab 98
Cov hauv qab no piav qhia txog cov kauj ruam ua hauv cov txheej txheem zinc electroplating. Kauj Ruam 1 - Ntxuav lub substrate. Kauj Ruam 2 - Ua kom lub substrate. Kauj Ruam 3 - Kev Npaj Cov Tshuaj Plating. Kauj Ruam 4 - Zinc Electroplating. Kauj Ruam 5 - Yaug thiab ziab
Yuav Ua Li Cas Kom Tshem Tau Cov Kab Tsuag Siv Tshuaj Tsuag Qej. Qej tsw tuaj yeem pab tiv thaiv cov nyom nyom thiab lwm yam kab tsuag hauv vaj. Plua plav nplooj nrog hmoov. Cov hmoov nplej tuaj yeem ua rau cov nyom tshaib plab los ntawm gumming li lawv lub qhov ncauj. Taw qhia Ntuj Predators. Teem Lub Nruas Nruas Ntev. Txhawb Koj Tus Kheej Cov Qaib lossis Guinea Fowls
Nws yog ib qho tseem ceeb uas yuav tsum tau ua kom qhov kev sim npog kom tsis txhob muaj plua plav thiab lwm yam khoom siv tsis xav tau los ntawm kev cuam tshuam kev loj hlob siv lead ua. Saib xyuas kev tsim cov muaju ntawm cov hlua txhua hnub. Sab laug tsis muaj kev cuam tshuam, cov muaju yuav tsum loj dua txhua hnub kom txog thaum cov tshuaj qhuav qhuav
Newton paub txog kev tsim cov cai ntawm kev txav mus los thiab lub ntiajteb txawj nqus, uas tau ua rau nws txoj haujlwm incalculus. Thaum sim piav qhia txog yuav ua li cas cov khoom ntog, Newton pom tias qhov ceev ntawm cov khoom tau nce txhua qhov sib cais thib ob thiab tsis muaj lej siv tam sim no tuaj yeem piav qhia qhov khoom ntawm lub sijhawm twg los tau
Kev cuam tshuam ntawm tes yog txheej txheem kom tau txais cov kua dej intracellular los ntawm txoj kev uas qhib cov phab ntsa ntawm tes. Lub hom phiaj tag nrho hauv kev cuam tshuam ntawm tes yog kom tau txais cov kua dej intracellular yam tsis cuam tshuam ib qho ntawm nws cov khoom
Thaum lub sijhawm sau ntawv, RNA polymerase nyeem cov qauv DNA strand hauv 3'→ 5' kev taw qhia, tab sis mRNA yog tsim nyob rau hauv 5' rau 3' kev taw qhia. mRNA yog ib leeg-stranded thiab yog li ntawd tsuas muaj peb lub peev xwm nyeem ntawv, ntawm uas tsuas yog ib qho raug txhais
Teb thiab piav qhia: Tus nqi ntawm tus lej complex, 2i, yog 2
Cov hlau twg yuav tsim xeb? Hlau. Hlau yuav xeb sai heev. Yog tias hlau raug tso cai kom ntub thiab raug huab cua pom xim av xeb tuaj yeem txhim kho hauv ob peb teev xwb. Aluminium. Aluminium kuj tseem mined tawm hauv av raws li oxidized compound hu ua Bauxite. Tooj. Tooj liab rusts los ntawm nws cov xim hlau ntuj xim av ntxoov ntxoo mus rau ib tug kaj ntsuab
Ntau lub ntsiab lus hnyav dua hlau yog tsim supernova tawg. Tus nqi ntawm lub zog tso tawm thaum lub sij hawm supernova tawg yog siab heev uas lub zog pub dawb thiab cov neutrons dawb streaming los ntawm cov tub ntxhais sib tsoo ua rau muaj kev cuam tshuam loj heev, ntev dhau los ntawm kev tsim cov hlau
Helicases feem ntau yog siv los cais cov strands ntawm DNA ob lub helix los yog tus kheej-annealed RNA molecule siv lub zog los ntawm ATP hydrolysis, ib tug txheej txheem los ntawm kev tawg ntawm hydrogen bonds ntawm annealed nucleotide bases
Lub synthesis ntawm acetyl ferrocene yog raws li nram no: Them ib 25mL puag ncig hauv qab khob nrog ferrocene (1g) thiab acetic anhydride (3.3mL). Ntxiv phosphoric acid (0.7mL, 85%) thiab ua kom sov cov tshuaj tiv thaiv sib tov ntawm cov dej kub da dej rau 20 feeb nrog nplawm. Ncuav qhov sib tov kub rau hauv dej khov (27g)
Nws yog cov tshuaj formula rau qabzib. Cov lej sau npe (6, 12, 6), qhia tias nws muaj 6 Carbon atoms, 12 Hydrogen atoms thiab 6 Oxygen atoms hauv molecule. C6H12O6 yog lub npe tshuaj rau qab zib (tshwj tsis yog txhua tus lej yuav raug sau npe)
Dab tsi yog qhov txawv ntawm chromatin, chromatids, thiab chromosomes? Chromatin yog DNA thiab cov proteins uas tsim los ntawm chromosome. Chromosomes yog cov khoom sib cais ntawm DNA hauv ib lub cell. Thiab Chromatids yog cov khoom zoo ib yam ntawm DNA tuav ua ke los ntawm centromere
Cov txheej txheem ntawm kev xa DNA mus rau RNA los ua ke rau hauv cov cellular proteins hu ua DNA transcription. Kev hloov pauv yog thawj kauj ruam los tsim cov proteins hauv cov hlwb
Hauv kev ua lej, lub dav hlau yog lub tiaj tus, ob sab ntawm qhov chaw uas txuas mus tsis kawg. Lub dav hlau yog ob-dimensional analogue ntawm ib qho point (zero dimensions), ib kab (ib dimension) thiab peb-dimensional qhov chaw
Qhov zoo tshaj plaws uas AC hluav taws xob muaj tshaj DC hluav taws xob yog tias AC voltages tuaj yeem hloov pauv mus rau qib siab dua lossis qis dua, thaum nws nyuaj ua qhov ntawd nrog DC voltages. Qhov no yog vim qhov high voltages los ntawm qhov chaw nres tsheb fais fab tuaj yeem txo tau yooj yim kom muaj kev nyab xeeb dua rau kev siv hauv tsev
Qhov av qeeg ua rau muaj kev puas tsuaj rau ntau dua 35,000 lub tsev, 147 lub tsev kawm ntawv, thiab 3,000 kev lag luam thiab / lossis lwm lub tsev, nrog rau kev puas tsuaj loj rau 10,000 lub tsev (kev puas tsuaj muaj nqis tshaj $ 1,000) thiab 42 lub tsev kawm ntawv (kev puas tsuaj), nyob hauv thaj tsam Newcastle tam sim ntawd
Nws tau sim nyob rau xyoo 1900s thaum ntxov nrog cov khoom siv pob zeb uas tau ua kom sov kom txog thaum nws yaj thiab tom qab ntawd tso cai rau kom txias rau qhov kub ntawm lub hom phiaj uas nws tau soj ntsuam cov hom minerals uas tsim hauv cov pob zeb tsim. Bowen txiav txim siab tias cov zaub mov tshwj xeeb tsim ntawm qhov kub thiab txias raws li magma txias
Dej hiav txwv. Peb feem tsib ntawm lub ntiaj teb saum npoo yog nyob rau hauv dej hiav txwv, thiab dej hiav txwv pem teb yog nplua nuj nyob rau hauv nthuav dav raws li cov av nto uas peb paub. Los ntawm 6000 meters, feem ntau ntawm cov dej hiav txwv yog drained tsuas yog rau cov dej hiav txwv trenches, qhov tob tshaj plaws ntawm uas yog Marianas Trench ntawm qhov tob ntawm 10,911 meters
Ib kab zaj duab xis yog cov duab kos duab ntawm cov ntaub ntawv raws li tus lej kab nrog Xs lossis dots sau saum toj no cov lus teb los qhia cov naj npawb ntawm qhov tshwm sim cov lus teb tshwm hauv cov ntaub ntawv teev. Xs lossis dots sawv cev rau qhov zaus. Ib txoj kab nqes yuav muaj outlier
Cov ntaub pua plag yog ib zajlus ntawm cov ntaub ntawv rau ib qho kev sib txawv ntawm ib qho, tso tawm raws li cov cim ntawm ib qho axis. Nws yog siv los pom qhov kev faib tawm ntawm cov ntaub ntawv. Raws li xws li nws yog analogous mus rau ib tug histogram nrog xoom-dav bins, los yog ib-dimensional scatter plot
AP Calculus AB npog qhov sib txawv ntawm qhov sib txawv ntawm ib qho kev sib txawv (qhov tseem ceeb yog thawj lub semester ntawm BC stretched tshaj ib xyoos). Raws li ib tug me nyuam kawm ntawv nyob rau hauv ib tug zoo sib xws, kuv xaiv mus kawm BC. Nws yeej yog ib chav kawm nyuaj, tab sis nws yog tag nrho tswj tau. Txawm hais tias koj nyob nruab nrab ntawm lej koj tseem tuaj yeem ua tau zoo hauv BC
Polyploidy yog lub xeev ntawm ib lub xovtooj ntawm tes lossis kab mob uas muaj ntau tshaj ob pawg (homologous) ntawm chromosomes. Txawm li cas los xij, qee yam kab mob yog polyploid, thiab polyploidy tshwj xeeb tshaj yog muaj nyob rau hauv cov nroj tsuag. Tsis tas li ntawd, polyploidy tshwm sim hauv qee cov ntaub so ntswg ntawm cov tsiaj uas tsis yog diploid, xws li tib neeg cov leeg nqaij
Ib qho dej ntws tawm, tseem hu ua sandur (plural: sandurs), sandr lossis sandar, yog ib qho yooj yim tsim ntawm glacial sediments tso los ntawm meltwater outwash ntawm qhov kawg ntawm lub glacier. Thaum nws ntws, lub glacier zom cov pob zeb hauv qab thiab nqa cov khib nyiab nrog