Frequency yog tus naj npawb ntawm qhov tshwm sim ntawm qhov tshwm sim ntawm ib lub sijhawm. Zaus yog ib qho tseem ceeb parameter siv nyob rau hauv science thiab engineering los qhia tus nqi ntawm oscillatory thiab vibratory phenomena, xws li mechanical vibrations, suab signals (suab), xov tooj cua tsis, thiab lub teeb
Tsiaj txhu pom nyob rau hauv Torrid Zone yog Zebra, tsov ntxhuav, Jaguar, Cheetah, Kangaroo thiab lwm yam noog nyob rau hauv Temperate Zone yog Sparrows, Finches, Thrushes, Hawks, Eaglesetc
Qhov chaw sib cuam tshuam. Txoj kev xav tsim los ntawm tus kws tshawb fawb nyiaj txiag Harold Hotelling uas qhia txog cov neeg sib tw, hauv kev sim ua kom muaj kev muag khoom ntau tshaj plaws, yuav nrhiav kev txwv ib leeg thaj chaw ntau npaum li qhov ua tau uas yuav ua rau lawv mus nrhiav qhov chaw nyob ib sab hauv nruab nrab ntawm lawv cov neeg siv khoom
1948 Tsis tas li ntawd, thaum twg yog lub xeev txoj kev xav tau npaj tseg? Cov kev xav yog thawj zaug muab tso rau hauv 1948 los ntawm cov kws tshawb fawb Askiv Sir Hermann Bondi, Thomas Gold, thiab Sir Fred Hoyle. Nws tau tsim ntxiv los ntawm Hoyle los daws cov teeb meem uas tau tshwm sim hauv kev sib txuas nrog lwm qhov kev xav loj-bang.
Qee qhov piv txwv ntawm quadraticfunction Daim ntawv ceeb toom tias daim duab ntawm lub quadratic function yog parabola. Qhov no txhais tau hais tias nws yog ib qho nkhaus nrog ib lub pob.Cov duab yog symmetric txog ib kab hu ua lub axis ntawm symmetry.Qhov taw tes qhov twg lub axis ntawm symmetry intersects lub parabolais hu ua lub vertex
Prune 'Pink Dawn' viburnum tom qab nws nres paj. Tshem cov stems uas hla los yog rub lwm tus thiab cov ceg tuag lossis kab mob. Thinning lub shrubs tawm ib ntus pab txhawb kev loj hlob tshiab
Lub hom phiaj ntawm Cell Division. Kev faib tawm ntawm tes yog txheej txheem tseem ceeb rau lub cev tsim, kev loj hlob, thiab kho. Muaj ob hom kev faib cell hauv tib neeg. Cells tuaj yeem faib ua cov qe, cov phev thiab qe
Nuclear fission yog ib qho tshuaj tiv thaiv nuclear uas cov nucleus ntawm lub atom faib rau hauv me me (sib zog nuclei). Cov txheej txheem fission feem ntau tsim cov neutrons dawb thiab photons (nyob rau hauv daim ntawv ntawm gamma rays), thiab tso tawm ntau lub zog
Ionic tebchaw yog cov sib txuas nruab nrab uas ua los ntawm cov khoom zoo ions hu ua cations thiab tsis zoo them ions hu ua anions. 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
Equilibrium, hauv physics, qhov xwm txheej ntawm lub cev thaum tsis muaj lub xeev ntawm kev txav los yog nws lub zog sab hauv lub xeev yuav hloov nrog lub sijhawm
Hybridization. Hybridization yog ib qho txheej txheem uas cov molecules ntawm ib leeg-stranded deoxyribonucleic acid (DNA) los yog ribonucleic acid (RNA) raug khi rau kev sib txuas ua ke ntawm ib leeg-stranded DNA lossis RNA. Ob qhov sib ntxiv ib leeg-stranded DNA molecules tuaj yeem hloov kho ob lub helix tom qab annealing
Nyob rau hauv ib lub cell prokaryotic, transcription thiab txhais lus yog ua ke; uas yog, kev txhais lus pib thaum lub mRNA tseem tab tom ua ke. Hauv eukaryotic cell, transcription tshwm sim hauv lub nucleus, thiab kev txhais lus tshwm sim hauv cytoplasm
Table ntsev yog ib qho piv txwv ntawm ioniccompound. Sodium thiab chlorine ions tuaj ua ke rau formsodium chloride, lossis NaCl. Cov sodium atom nyob rau hauv no compoundloses ib tug electron los ua Na +, thaum lub chlorine atom nce anelectron los ua Cl-. Qhov no yog vim hais tias cov nqi yuav tsum bebalanced rau lub ionic compound
Mus ntsib Bedford County Nyob rau hauv lub suburbs ntawm New Paris, PA (South Central Pennsylvania) Gravity Hill yog ib qho tshwm sim. Cov tsheb dov nce toj thiab dej ntws tsis ncaj ncees lawm. Tsis muaj nqi rau venture mus rau Gravity Hill. Nws yog, yooj yim heev, txoj kev nyob rau hauv ib qho chaw deb ntawm Bedford County
Newton txoj cai ntawm kev txav Newton txoj cai ntawm universal gravitation
Thaum muaj av qeeg, lub seismometer tseem nyob thaum rooj plaub nyob ib puag ncig nws txav nrog av co. Kev lig kev cai, qhov raug tshem tawm yog lub pendulum, tab sis feem ntau niaj hnub seismometers ua haujlwm electromagnetically
Yam tsawg kawg yog peb qhov laj thawj yog vim li cas theem nruab nrab ntawm kev vam meej muaj ntau dua biodiversity dua li hav zoov climax. Hauv hav zoov hav zoov hav zoov lossis huab cua sov, cov khaubncaws sab nraud povtseg (uas feem ntau tsim cov hom climax) qeeb. Qhov no ua rau muaj ntau lub hnub ci hauv ib cheeb tsam
Cov kua qaub thiab alkalis ob leeg muaj ions. Cov kua qaub muaj ntau cov hydrogen ions, uas muaj lub cim H +. Alkalis muaj ntau hydroxide ions, cim OH-. Dej yog nruab nrab vim hais tias tus naj npawb ntawm hydrogen ions sib npaug rau cov hydroxide ions
Ib daim duab peb sab prism muaj peb lub duab plaub sab thiab ob lub ntsej muag daim duab peb sab. Txhawm rau nrhiav thaj tsam ntawm lub kaum sab xis, siv tus qauv A = lw, qhov twg A = thaj tsam, l = ntev, thiab h = qhov siab. Txhawm rau nrhiav thaj tsam ntawm daim duab peb sab, siv cov qauv A = 1/2bh, qhov twg A = thaj tsam, b = puag, thiab h = qhov siab
Ib qho kev khiav ntawm cov khoom siv hluav taws xob xws li qhov no yog hu ua hluav taws xob tam sim no. Nws muaj peev xwm ua tau rau qhov hluav taws xob tam sim no yog qhov ntws ntawm cov khoom zoo lossis cov khoom tsis zoo. Hauv cov pa roj, ob qho tib si zoo thiab tsis zoo ions tuaj yeem ntws. Zoo tag nrho cov hluav taws xob tam sim no muaj kev txav ntawm electrons
Cov cheeb tsam ntawm lub cev muaj xws li: Geomorphology: cov duab ntawm lub ntiaj teb nto thiab nws tuaj txog li cas. Hydrology: lub ntiaj teb dej. Glaciology: glaciers thiab daim ntawv dej khov. Biogeography: hom, lawv faib li cas thiab vim li cas. Climatology: kev nyab xeeb. Pedology: av
Txhawm rau txiav txim siab qhov laj thawj koj yuav tsum ua qhov kev xeem randomization. Koj coj koj cov ntawv xeem, thiab xaiv ib nrab ntawm lawv kom muaj qhov zoo A thiab ib nrab kom tsis muaj nws. Tom qab ntawd koj pom tias muaj qhov sib txawv tseem ceeb hauv qhov zoo B ntawm ob pawg
Druzy, zoo li ntau lub gemstones, yog ib txwm tshwm sim thiab tshwm sim thaum dej coj cov zaub mov mus rau lub pob zeb saum npoo, thiab tom qab ntawd cov dej evaporates. Thaum lub sijhawm ua haujlwm no, qhov txias txias tshwm sim, thiab cov zaub mov raug tso tseg los ua cov muaju rau saum pob zeb
Cov ntaub ntawv ntawm RNA suav nrog tus xa xov RNA (mRNA), hloov RNA (tRNA), thiab ribosomal RNA (rRNA)
Yog tias koj tab tom nrhiav ib yam dab tsi me ntsis ntxiv tam sim no, txawm li cas los xij, nws yog qhov zoo los tsuas yog pleev xim rau nws. Yog tias cov ntoo thuv tau npog nrog polyurethane, tej zaum koj yuav tau siv cov roj-raws li primer ua ntej, vim hais tias ib tug latex primer yuav tsis lo zoo rau lub polyurethane nto
Hauv kev tshawb fawb, lo lus ntuj yog hais txog txhua lub ntsiab lus ntawm lub ntiaj teb lub cev - txawm tias tsim los ntawm tib neeg lossis tsis yog. Qhov no suav nrog cov teeb meem, lub zog uas ua rau muaj teeb meem, lub zog, cov khoom ntawm lub ntiaj teb lom neeg, tib neeg, tib neeg lub neej, thiab cov khoom ntawm lub zej zog
Daim Ntawv Qhia Kev Nyab Xeeb (SDS) yog dab tsi? Ib qho SDS (yav tas los hu ua MSDS) suav nrog cov ntaub ntawv xws li cov khoom ntawm txhua yam tshuaj; lub cev, kev noj qab haus huv, thiab ib puag ncig kev puas tsuaj; kev tiv thaiv; thiab kev tiv thaiv kev nyab xeeb rau kev tuav, khaws cia, thiab thauj cov tshuaj
Cov rays tawm tsam yog ob lub rays uas ob qho tib si pib los ntawm ib qho kev taw qhia thiab tawm mus rau qhov sib txawv raws nraim. Vim yog qhov no, ob lub rays (QA thiab QB hauv daim duab saum toj no) tsim ib txoj kab ncaj nraim los ntawm qhov kawg Q. Thaum ob lub rays sib txawv, cov ntsiab lus A, Q thiab B yog collinear
Kev nthuav dav ntawm Permo-Carboniferous glacial sediments nyob rau hauv South America, Africa, Madagascar, Arabia, Is Nrias teb, Antarctica thiab Australia yog ib qho ntawm cov pov thawj tseem ceeb rau txoj kev xav ntawm continental drift
Yog tias koj raug nug kom ua haujlwm tawm ntawm cov khoom ntawm ob lossis ntau tus lej, ces koj yuav tsum muab cov lej sib npaug ua ke. Yog tias koj raug nug kom pom cov lej ntawm ob lossis ntau tus lej, ces koj yuav tsum tau ntxiv cov lej ua ke
Planarians tuaj yeem hloov los ntawm ib lub thawv mus rau lwm qhov siv cov yas Pasteur pipettes nrog qhib qhov loj txaus kom haum rau cov kab cab tsis ua rau lawv raug mob. Yog hais tias qhov qhib ntawm Pasteur pipette tsis loj txaus, lub pipette taub hau tuaj yeem txiav nrog txiab
Dab tsi yog Ethnographic Essay? Nws yog anessay uas tsom rau ib pawg, kab lis kev cai lossis subculture. Hais txog kev soj ntsuam ze, kev xam phaj, thiab cov ntawv sau tseg. Cov kev tshawb fawb ntxiv tuaj yeem pom los ntawm cov ntaub ntawv hauv tsev qiv ntawv
Lub hnub yog es tsis txhob muab lub zog ntawm nuclear fusion ntawm nws cov ntsiab lus tseem ceeb, hydrogen, rau hauv helium. Cov tshuaj tiv thaiv no tsuas yog tshwm sim ntawm qhov kub thiab txias siab heev li cov uas pom nyob ze ntawm lub hauv paus ntawm peb lub hnub loj heev. Lub hnub yog kwv yees li 332,946 npaug loj li lub ntiaj teb
Lub mitochondrial respiratory saw yog tsim los ntawm tsib enzyme complexes uas ua ke tsav cov txheej txheem ntawm oxidative phosphorylation thiab tuav lub proton gradient los ntawm uas adenosine triphosphate (ATP) ntau lawm yog khaws cia
Blue spruce ntoo yog cov kab mob kis tau los ntawm cov kab mob Rhizosphaera. Tus kab mob, hu ua Rhizosphaera koob cam khwb cia, yog qhov teeb meem feem ntau pom ntawm xiav spruce cov qauv uas tau xa mus rau Chaw Kho Mob Kab Mob
North American Biomes: Arctic & Alpine Tundra. Coniferous Forest (Taiga) Tundra Biome. Alpine tundra hauv Rocky Toj siab ntawm Colorado. Coniferous hav zoov Biome. Prairie Biome: koj puas xav tau ntau tus thwjtim? Deciduous Forest Biome. Suab puam Biome. Tropical Rain Forest Biome. Nroog Sprawl
Torsion tso cai rau ko taw kom thim rov qab tom qab lub taub hau kom tiv thaiv lub taub hau zoo dua. DETORSION. Detorsion yog thim rov qab ntawm torsion uas tshwm sim thaum lub sij hawm evolution plhaub ploj los yog ib hom plhaub evolves uas muaj qhov qhib rau sab nraud. Hauv cov xwm txheej zoo li no, kev sib tw ntawm visceral loj tsis tsim nyog
Lub ntiajteb txawj nqus yog lub zog uas tsav condensation. Raws li lub pob ntawm plua plav thiab roj cog lus nyob rau hauv nws tus kheej lub ntiajteb txawj nqus, nws pib ntsws thiab nws cov tub ntxhais yuav pib tawg sai thiab sai dua. Qhov no ua rau lub hauv paus cua sov thiab tig
Kev hloov pauv, cov txheej txheem uas cov kab mob DNA tau txav los ntawm ib tus kab mob mus rau lwm tus los ntawm tus kab mob (ib kab mob bacteriophage, lossis phage). Bacterial conjugation, txheej txheem uas cuam tshuam txog kev hloov pauv ntawm DNA ntawm plasmid los ntawm tus neeg pub khoom ntawm tes mus rau cov neeg tau txais kev sib txuas ntawm tes thaum lub sijhawm sib cuag ntawm tes