Yog hais tias lub zog theem ntawm cov reactants siab tshaj lub zog theem ntawm cov khoom, cov tshuaj tiv thaiv yog exothermic (lub zog tau raug tso tawm thaum lub sij hawm cov tshuaj tiv thaiv). Yog hais tias lub zog theem ntawm cov khoom yog siab tshaj lub zog theem ntawm cov reactants nws yog ib tug endothermic cov tshuaj tiv thaiv
Thaum peb muab ob lub ntsiab lus raws li txoj kev no, peb muaj biconditional. Lus Txhais: Ib nqe lus biconditional txhais tau tias muaj tseeb thaum twg ob qho tib si muaj qhov tseeb qhov tseeb. Lub biconditional p q sawv cev rau 'p yog tias thiab tsuas yog q,' qhov twg p yog qhov kev xav thiab q yog qhov xaus
Nyob rau hauv ib daim duab tiav, muaj ib ntug nruab nrab ntawm txhua khub ntawm vertices hauv daim duab. Qhov thib ob yog piv txwv ntawm ib daim duab txuas. Hauv kev sib txuas, nws tuaj yeem tau txais los ntawm txhua qhov vertex hauv daim duab mus rau lwm qhov vertex hauv daim duab los ntawm aseries ntawm ntug, hu ua txoj kev
Osmosis kuj tshwm sim thaum dej txav ntawm ib lub cell mus rau lwm qhov. Kev yooj yim diffusion ntawm qhov tod tes tshwm sim thaum qhov nruab nrab nyob ib puag ncig ntawm lub cell yog nyob rau hauv siab concentration ntawm ions los yog molecules tshaj qhov chaw nyob rau hauv lub cell. Cov molecules txav los ntawm ib puag ncig nruab nrab mus rau hauv lub cell vim diffusion gradient
Dej cov ntoo me tsis tu ncua thiab cia lawv qhuav tawm ntawm txhua qhov dej. Fertilizer feem ntau tsis tsim nyog tshwj tsis yog tias cov av tsis zoo. Thaum tsob ntoo loj tuaj, kev saib xyuas tsob ntoo cedar cuam tshuam me ntsis ntau dua li niaj zaus mulching thiab tshem tawm cov ceg tuag lossis kab mob
Simplify 6/20 rau daim ntawv yooj yim tshaj plaws. Online yooj yim lub laij lej feem ntau kom txo tau 6/20 rau cov nqe lus qis tshaj sai thiab yooj yim. 6/20 Cov Lus Teb Yooj Yim: 6/20 = 3/10
Oxidising. Ib qho kev faib tawm rau cov tshuaj thiab kev npaj uas ua rau exothermically nrog rau lwm yam tshuaj. Hloov cov cim yav dhau los rau oxidizing. Lub cim yog nplaim taws hla ib lub voj voog
Yog li, kev sib raug zoo yog hais txog kev sib raug zoo ntawm ob qhov sib txawv. Feem ntau, ob qho tib si txuas ntxiv (lossis ze li ntawd) tab sis muaj kev hloov pauv rau rooj plaub uas ib tus yog dichotomous. Chi-square feem ntau yog hais txog kev ywj pheej ntawm ob qhov sib txawv. Feem ntau, ob qho tib si yog categorical
Feem ntau ntawm echinoderms reproduces kev sib deev, los ntawm kev tso cov phev thiab qe mus rau hauv dej kom fertilized.Indirect kev loj hlob, nyob rau hauv uas cov fertilized qe loj hlob los ntawm eggto larva mus rau cov me nyuam yaus yam tsis muaj kev txhawb nqa los ntawm niam txiv, feem ntau yog cov qe fertilized
Cri du chat syndrome - tseem hu ua 5p- syndrome thiab cat cry syndrome - yog ib yam kab mob uas tsis tshua muaj tshwm sim los ntawm kev tshem tawm (ib qho ploj lawm) ntawm cov khoom siv caj ces ntawm caj npab me (p caj npab) ntawm chromosome 5. Qhov ua rau ntawm no tsis tshua muaj chromosomal deletion yog tsis paub
Genetic recombination (tseem hu ua genetic reshuffling) yog kev sib pauv ntawm cov khoom siv caj ces ntawm cov kab mob sib txawv uas ua rau muaj cov xeeb ntxwv nrog kev sib txuas ntawm cov yam ntxwv sib txawv ntawm cov uas pom hauv niam txiv
Coastal Plain Qhov no yog tus yau tshaj plaws ntawm lub cev lub xeev, tsim los ntawm cov av nkos eroded los ntawm Appalachian Highlands thiab tso raws ntug dej hiav txwv Atlantic. Lub ntug hiav txwv Plain sib txawv nyob rau hauv topography ntawm sab qaum teb mus rau sab qab teb
Muaj tsib lub ntsiab lus tseem ceeb ntawm thaj chaw: qhov chaw, qhov chaw, tib neeg-ib puag ncig kev sib cuam tshuam, kev txav mus los, thiab cheeb tsam
Lambda DNA siv nyob rau hauv qhov kev sim no yog cais raws li ib tug linear molecule los ntawm E. coli bacteriophage lambda. Nws muaj kwv yees li 49,000 lub hauv paus khub thiab muaj 5 qhov chaw lees paub rau Eco RI, thiab 7 rau Hind III
1 cubic meter/second yog sib npaug rau 1000 litres ib ob
Kev kuaj cov zaub mov yog txheej txheem siv los xyuas tias cov khoom noj muaj kev nyab xeeb thiab tsis muaj cov kab mob phem, lossis nws tsuas muaj cov tshuaj ntxiv uas tau tso cai ntawm qib uas tau txais, lossis tias nws muaj cov qib zoo ntawm cov khoom xyaw tseem ceeb thiab nws cov ntawv tshaj tawm yog raug, los yog kom paub cov qib ntawm cov as-ham tam sim no
Wavelength = ceev ntawm lub teeb / zaus = 3 x 108 m / s / 1.06 x 108 Hz = 3 meters - txog 10 feet
Tshaj pH 8.2, phenol liab hloov xim liab (fuchsia) xim. thiab yog txiv kab ntxwv-liab. Yog tias pH nce ntxiv (pKa = 1.2), cov proton los ntawm pawg ketone ploj, ua rau daj, tsis zoo them ion denoted li HPS& rho tawm;
Cov txiv hmab txiv ntoo no tau raug xaiv vim lawv yogtriploid (bananas) thiab octoploid (strawberries). Qhov no txhais tau hais tias lawv muaj ntau DNA hauv lawv lub hlwb, uas txhais tau hais tias muaj ntau ntau rau peb rho tawm. Lub hom phiaj ntawm themashing yog los rhuav tshem cov phab ntsa ntawm tes
Mineral crystals tsim nyob rau hauv ntau yam sib txawv thiab ntau thiab tsawg. Ib qho ntxhia yog tsim los ntawm atoms thiab molecules. Raws li cov atoms thiab molecules ua ke, lawv tsim ib qho qauv. Cov duab kawg ntawm cov ntxhia qhia txog qhov qub atomic zoo
Ba(OH)2 + 2HNO3 → Ba(NO3)2 + 2H2O. Barium hydroxide react nrog nitric acid los tsim barium nitrate thiab dej
Cov dej nkag mus rau ntawm daim ntawv vim kev ua haujlwm capillary. Qhov no yog thaum kev sib txuas ntawm cov kua molecules rau lawv tus kheej tsawg dua qhov kev nyiam rau lwm yam khoom uas cov molecules tau kov. Cov sodium bitartrate muaj sodium ion, peb pawg hydroxyl, thiab ob daim ntawv cog lus ob npaug
Cuaj yam kev phom sij yog raws li nram no: Chav 1: Cov khoom tawg. Chav Kawm 2: Gases. Chav Kawm 3: Flammable thiab Combustible Liquids. Chav Kawm 4: Flammable Solids. Chav Kawm 5: Cov Tshuaj Oxidizing, Organic Peroxides. Chav Kawm 6: Cov tshuaj lom thiab cov khoom sib kis. Chav Kawm 7: Cov Khoom Siv Hluav Taws Xob. Chav Kawm 8: Corrosive
Kev txhais ntawm Lub Nplhaib ntawm Hluav Taws Lub Nplhaib ntawm Hluav Taws yog hais txog thaj chaw thaj chaw ntawm cov roob hluav taws kub thiab seismic nyob ib ncig ntawm ntug dej hiav txwv Pacific. Tag nrho raws li lub nplhaib no, av qeeg thiab volcanic eruptions yog tshwm sim vim hais tias ntawm tectonic phaj ciam teb thiab txav
John Dalton FRS (/ˈd?ːlt?n/; 6 Cuaj hlis 1766 – 27 Lub Xya hli ntuj 1844) yog ib tug Askiv chemist, physicist, thiab meteorologist. Nws paub zoo tshaj plaws rau kev qhia txog atomic txoj kev xav rau hauv chemistry, thiab rau nws txoj kev tshawb fawb rau hauv qhov muag tsis pom xim, qee zaum hu ua Daltonism hauv nws txoj kev hwm
Standard Form: daim ntawv qauv ntawm ib kab yog nyob rau hauv daim ntawv Ax + By = C qhov twg A yog ib tug zoo integer, thiab B, thiab C yog integers
Feem ntau sandstone yog tsim los ntawm quartz thiab / los yog feldspar vim hais tias cov no yog cov minerals ntau tshaj plaws nyob rau hauv lub ntiaj teb crust. Zoo li cov xuab zeb, sandstone tej zaum yuav muaj xim, tab sis cov xim feem ntau yog xim av, xim av, daj, liab, grey thiab dawb
Alkanes. Ib qho alkane yog hydrocarbon nyob rau hauv uas tsuas muaj ib qho kev sib cog lus xwb. Qhov yooj yimstalkane yog methane, nrog cov mis molecular CH4. Cov pa roj carbonis lub hauv paus atom thiab ua rau plaub ib qho kev sib cog lus rau hydrogen atoms
Lub caij thib ob ntawm "Cosmos" yuav tsis tawm hauv lub Peb Hlis raws li tau npaj tseg. Cov ntawv tsis tseeb uas tau tuav los ntawm astrophysicist Neil deGrasse Tyson tau tshaj tawm rau lub Peb Hlis 3 ntawm Fox thiab National Geographic. Tab sis raws li cov npe xa tawm los ntawm Fox rau hnub Friday, rov ua dua ntawm "Tsev Neeg Txiv Neej" yuav tam sim no tawm hauv lub sijhawm npaj rau koob
Teb thiab piav qhia: Cov molar loj ntawm sodium hydroxide sib npaug 39.997g / mol. Txhawm rau txiav txim siab qhov molar mass, muab cov atomicmass los ntawm tus lej ntawm atoms hauv theformula
Ib thaj tsam ntawm cov phaj tsim, qee zaum hu ua divergent phaj npoo, tshwm sim thaum cov phaj txav sib nrug. Volcanoes yog tsim raws li magma qhov dej los sau qhov sib txawv, thiab nws thiaj li tshiab crust tsim. Ib qho piv txwv ntawm kev tsim phaj ciam teb yog qhov nruab nrab-Atlantic Ridge
A-qhov hnyav yog qhov sib txawv ntawm qhov nkhaus (lossis lim) uas yog siv rau lub suab siab microphone ntsuas kom ua raws li qhov cuam tshuam ntawm tib neeg lub rooj sib hais. Muab tib lub suab siab, cov ntaub ntawv kaw lus microphone tuaj yeem sib txawv ntau dua li cov qib pom los ntawm tib neeg pob ntseg (Daim duab 1)
Cov piv txwv uas paub zoo tshaj plaws ntawm cov theem yog cov khib nyiab, kua, thiab roj. Cov theem tsis paub muaj xws li: plasmas thiab quark-gluon plasmas; Bose-Einstein condensates thiab fermionic condensates; txawv txawv; kua muaju; superfluids thiab supersolids; thiab paramagnetic thiab ferromagnetic theem ntawm cov khoom sib nqus
Raws li peb tau pom, cua daj cua dub muaj tseeb hauv Arizona. Arizona txawm ntsib ob hom cua daj cua dub, cua daj cua dub supercell thiab tsis yog supercell cua daj cua dub. Uas tau hais tias, cua daj cua dub tseem yog huab cua tsis tshua muaj tshwm sim, thiab thaum lawv tshwm sim, feem ntau yog ntsuas qis dua ntawm EFScale
Nyuj nyob qhov chaw. Heston qhia tias acow hauv qhov chaw tuaj yeem muab cov mis nyuj uas xav tau rau cov calcium no, tab sis kuj piav qhia tias nws yuav raug nqi ntau lab phaus hauv cov nqi roj ib leeg, kom lawv yuav tsis muaj sia nyob rau g-forces ntawm kev tso tawm thiab, thaum nyob ntawd, lawv yuav noj qhov hnyav ntawm peb astronauts nyob rau hauv nyom txhua hli
Cov mis siv nyob rau hauv PMBOK rau tus qauv sib txawv yog yooj yim. Nws tsuas yog (P-O) / 6. Qhov ntawd yog qhov pessimistic kev ua ub no kwv yees rho tawm qhov kev kwv yees qhov kev xav tau muab faib los ntawm rau. Qhov teeb meem yog qhov no nyob rau hauv tsis muaj txoj kev zoo los yog daim ntawv tsim ib qho kev ntsuas ntawm tus qauv deviation
Hauv kev ua lej, ib pab pawg yog cov teeb tsa uas muaj kev ua haujlwm binary uas sib txuas ob lub ntsiab lus los tsim ib qho thib peb hauv txoj hauv kev uas plaub yam kev mob hu ua pab pawg axioms txaus siab, uas yog kaw, kev sib koom ua ke, tus kheej thiab invertibility. Cov pab pawg sib koom ib qho kev sib koom ua ke nrog kev xav ntawm symmetry
Circumference ntawm lub voj voog yog sib npaug rau 2 π r qhov twg r yog nws lub vojvoog. Nyob rau hauv lub ntiaj teb no, lub circumference ntawm tus kheej ntawm ib tug muab latitude yog 2πr(cos θ) qhov twg θ yog lub latitude thiab r yog lub vojvoog ntawm lub ntiaj teb ntawm kab zauv
Siv tus qauv. Lub voj voog ntawm lub voj voog yog pom nrog tus qauv C = π * d = 2 * π * r. Yog li pi sib npaug ntawm lub voj voog lub voj voog muab faib los ntawm nws txoj kab uas hla
Digital ammeter siv lub shunt resistor los tsim ib tug calibrated voltage proportional rau tam sim no ntws. Raws li qhia hauv daim duab, nyeem qhov tam sim no peb yuav tsum xub hloov qhov tam sim no los ntsuas rau hauv qhov hluav taws xob los ntawm kev siv tus paub tsis kam RK. Qhov voltage thiaj li tsim tau calibrated los nyeem cov input tam sim no