Video: Dab tsi yog qhov kev daws teeb meem ntawm kab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib qhov system ntawm kab zauv sib npaug muaj ob lossis ntau qhov sib npaug piv txwv li. y = 0.5x + 2 y = x - 2. Cov daws ntawm xws li ib tug system yog tus txiav txim khub uas yog ib daws rau ob qhov sib npaug. Cov daws mus rau qhov system yuav nyob rau hauv qhov chaw uas ob kab sib tshuam.
Sib piv, qhov kev daws teeb meem rau qhov sib npaug yog dab tsi?
Nyob rau hauv dav dav, los txiav txim lub daws mus rau ib tug linear kev sib npaug nrog ob qhov sib txawv, cov kev sib npaug yog rewritten thiab daws nyob rau hauv cov nqe lus ntawm ib tug kuj sib txawv. Cov daws rau cov kev sib npaug x + y = 7, ces dhau los ua ib khub ntawm qhov tseem ceeb uas ua rau x = 7 - y muaj tseeb.
Ib tug kuj yuav nug, dab tsi yog qhov kev daws teeb meem? A daws rau ib qho kev sib npaug yog ib qho taw tes uas nyob ntawm kab rau qhov sib npaug. A daws rau qhov system ntawm kev sib npaug yog ib qho taw tes uas nyob ntawm txhua kab hauv qhov system.
Kuj paub, kab dab tsi tsis muaj kev daws teeb meem?
Txij thaum uas tig mus kab yeej tsis hla, ces yuav muaj tsis muaj kev sib tshuam; uas yog, rau ib tug system ntawm equations uas graphs li parallel kab , tuaj yeem muaj tsis muaj tshuaj . Qhov no yog hu ua "inconsistent" system ntawm equations, thiab nws tsis muaj kev daws teeb meem.
Kev daws yog dab tsi?
A daws yog homogeneous hom sib tov ntawm ob los yog ntau tshaj tshuaj. A daws Nws muaj ob ntu: ib qho kuab tshuaj thiab cov kuab tshuaj. Solute yog cov khoom uas yaj, thiab cov kuab tshuaj yog feem ntau ntawm cov daws . Kev daws teeb meem tuaj yeem muaj nyob hauv ntau theem - khoom, kua, thiab roj.
Pom zoo:
Cov txheej txheem ntawm kev tsim cov kev daws teeb meem yog dab tsi?
Kev daws yog tsim thaum ib yam khoom hu ua thesolute 'dissolves' rau hauv lwm yam khoom hu ua hnyav.Dissolving yog thaum lub solute tawg los ntawm ib tug loj siv lead ua ntawm molecules mus rau ntau me me los yog ib tug molecules. Lawv ua qhov no los ntawm rub tawm cov ions thiab tom qab ntawd ncig cov ntsev molecules
Dab tsi yog qhov txawv ntawm magnification thiab daws teeb meem ntawm ib daim duab nyob rau hauv lub tshuab microscope?
Magnification yog lub peev xwm ua kom cov khoom me me zoo li loj dua, xws li ua kom pom cov kab mob microscopic. Kev daws teeb meem yog qhov muaj peev xwm paub qhov txawv ntawm ob yam khoom ntawm ib leeg. Lub teeb microscopy muaj kev txwv rau ob qho tib si nws qhov kev daws teeb meem thiab nws qhov loj
Qhov kev daws teeb meem ntawm lub stopwatch yog dab tsi?
Kev daws teeb meem muaj feem xyuam rau tus lej ntawm tus lej ntawm lub cuab yeej tso saib rau digital stopwatch, lossis qhov tsawg tshaj plaws los yog kawm tiav ntawm lub ntsej muag ntawm analog stopwatch. Piv txwv li, yog hais tias ib tug stopwatch zaub qhia ob tug lej mus rau sab xis ntawm tus zauv point, nws muaj ib tug daws teeb meem ntawm 0.01 s (10 ms, los yog 1/100 ntawm ib tug thib ob)
Puas yog nws ua tau rau ib qho kev sib npaug ntawm ob txoj kab sib npaug kom tsis muaj kev daws teeb meem piav qhia koj qhov laj thawj?
Cov kab ke ntawm kab sib npaug tuaj yeem tsuas muaj 0, 1, lossis ib qho kev daws teeb meem tsis kawg. Ob kab no tsis tuaj yeem hla ob zaug. Cov lus teb raug yog tias qhov system muaj ib qho kev daws teeb meem. Total Number of Points Number of 2-Point Baskets Number of 3-Point Baskets 17 4 (8 ntsiab lus) 3 (9 points) 17 1 (2 points) 5 (15 points)
Dab tsi yog qhov concentration ntawm hydronium ions nyob rau hauv ib qho kev daws teeb meem?
Cov dej ntshiab yog suav tias yog nruab nrab thiab qhov concentration ntawm hydronium ion yog 1.0 x 10-7 mol / L uas yog sib npaug rau hydroxide ion concentration