Video: Lub ntsiab txhais ntawm kev daws ntawm ib qho system yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txhais ( Kev daws teeb)
A daws qhov system ntawm equations yog ib daim ntawv teev cov zauv x, y, z, uas ua rau tag nrho cov kab zauv tseeb ib txhij. Cov daws set ib a qhov system ntawm equations yog sau tag nrho kev daws teeb meem.
Tsis tas li ntawd, dab tsi yog kev daws teeb meem ntawm lub system?
A qhov system ntawm linear equations muaj ob lossis ntau qhov sib npaug piv txwv li. y = 0.5x + 2 y = x - 2. Cov daws ntawm zoo li ib qhov system yog tus txiav txim khub uas yog a daws rau ob qhov sib npaug. Cov daws mus rau qhov system yuav nyob rau hauv lub point uas ob kab sib tshuam.
Tsis tas li ntawd, qhov system txhais li cas hauv lej? A " qhov system " ntawm qhov sib npaug yog ib txheej los yog sau ntawm qhov sib npaug uas koj cuam tshuam nrog tag nrho ua ke ib zaug. Kab sib npaug (tus uas graph li cov kab ncaj) yog qhov yooj yim dua li cov kab zauv uas tsis yog kab sib npaug, thiab qhov yooj yim tshaj plaws linear qhov system yog ib qho nrog ob qhov sib npaug thiab ob qhov sib txawv.
Tsis tas li lo lus nug yog, koj yuav nrhiav kev daws teeb meem ntawm qhov system li cas?
Kev piav qhia: Txoj kev yooj yim tshaj plaws rau kev daws teeb meem tshuab ntawm qhov sib npaug yog hloov ib qho kev sib npaug kom nws tso cai rau kev tshem tawm ntawm qhov sib txawv. Nyob rau hauv cov ntaub ntawv no, peb yuav multiply displaystyle 3x + y = 8 los ntawm kom tau. Tom qab ntawd, peb tuaj yeem ntxiv displaystyle 2x + 4y = 12 rau qhov sib npaug no kom tawm los, yog li.
Dab tsi yog lub ntsiab lus ntawm kev daws teeb meem ntawm ib txoj kab sib npaug?
A daws ntawm a linear system yog ib qho kev muab nqi rau cov variables x1, x2,,xov zoo li txhua tus ntawm kev sib npaug puas yog. Cov teeb ntawm tag nrho cov kev daws teeb meem yog hu ua kev daws teeb meem . A linear system tej zaum yuav coj tus cwj pwm nyob rau hauv ib qho ntawm peb txoj kev ua tau: Tus qhov system muaj ntau infinitely daws.
Pom zoo:
Qhov twg yog acidic ntau dua ib qho kev daws ntawm pH 2 lossis kev daws ntawm pH 6?
Kev piav qhia: pH yog qhov ntsuas ntawm acidity lossis alkalinity ntawm cov tshuaj. concentration siab dua yog acidity. Yog li ib qho kev daws ntawm pH = 2 yog acidic ntau dua li ntawm pH = 6 los ntawm qhov zoo ntawm 10000
Dab tsi yog lub ntsiab lus ntawm kev hloov pauv lom neeg hauv cov ntsiab lus ntawm allele zaus?
Microevolution, los yog evolution ntawm ib tug me me, yog txhais raws li ib tug kev hloov nyob rau hauv lub zaus ntawm noob variants, alleles, nyob rau hauv ib tug pej xeem ntau tiam. Lub teb ntawm biology uas kawm txog allele frequencies nyob rau hauv cov pejxeem thiab yuav ua li cas lawv hloov lub sij hawm yog hu ua pej xeem noob caj noob ces
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua
Dab tsi yog ib qho kev qhia uas muaj tsawg kawg yog ib qho kev sib txawv?
Algebraic qhia ?: Cov lus lej suav nrog tsawg kawg ib qho sib txawv thiab qee zaum tus lej thiab cov cim ua haujlwm
Dab tsi yog txhais los ntawm lub sij hawm dissociation thiab dab tsi yog ib qho piv txwv ntawm cov khoom uas dissociates?
Dissociation, nyob rau hauv chemistry, sib cais ntawm ib yam khoom mus rau hauv atoms los yog ions. Thermal dissociation tshwm sim ntawm qhov kub thiab txias. Piv txwv li, hydrogen molecules (H 2) dissociate rau hauv atoms (H) ntawm kub heev; ntawm 5,000 ° K txog 95% ntawm cov molecules hauv cov qauv ntawm hydrogen yog dissociated rau hauv atoms