Cov txheej txheem:
Video: Dab tsi yog teev nyob rau hauv lej thiab piv txwv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv lej , a teeb yog ib qho kev sau zoo ntawm cov khoom sib txawv, suav tias yog ib qho khoom hauv nws tus kheej. Rau piv txwv , tus lej 2, 4, thiab 6 yog cov khoom sib txawv thaum txiav txim siab sib cais, tab sis thaum lawv suav tias suav nrog lawv tsim ib leeg. teeb ntawm qhov loj peb, sau{2, 4, 6}.
Ib yam li ntawd, lub ntsiab lus ntawm kev teeb tsa hauv lej yog dab tsi?
A teev nyob rau hauv lej yog ib qho kev sau los ntawm cov khoom zoo thiab cov khoom sib txawv, suav tias yog ib qho khoom hauv nws tus kheej. Cov yam ntxwv tseem ceeb tshaj plaws yog tias a teeb "muaj" cov ntsiab lus, thiab qhov ntawd ob teeb yog sib npaug (ib qho thiab tib yam) ifand tsuas yog tias txhua lub ntsiab ntawm ib qho yog ib qho ntawm lwm tus.
Tom qab ntawd, lo lus nug yog, dab tsi yog teev nyob rau hauv lej 7? f) Cov teeb ntawm tag nrho cov lej uas nws tus nqi tsis sib npaug rau 7 . Teeb A, B, C thiab D yog txhais los ntawm: A = {2, 3, 4, 5, 6, 7 IB = {3, 5, 7 C = {3, 5, 7 , 20, 25, 30}
Kuj paub, dab tsi yog universal teev nyob rau hauv lej nrog piv txwv?
Rau piv txwv , xav txog tus lej ib tus lej 1 txog 9: Yog tias {1, 2, 3, 4, 5, 6, 7, 8, 9} yog peb qhov loj dua teeb , ces A thiab B yog ib feem ntawm qhov ntawd teeb . Lus txhais: A Universal Teeb yog cov teeb ntawm tag nrho cov ntsiab underconsideration, denoted los ntawm peev. Tag nrho lwm yam teeb cov ntaub ntawv ntawm cov universal teeb.
Dab tsi yog hom kev teeb tsa?
Hom teeb
- Singleton teeb. Yog hais tias ib lub teeb muaj tsuas yog ib lub caij nws yog hu ua ib tug singleton teeb.
- Finite Teeb. Ib txheej uas muaj tus naj npawb ntawm cov khoom, piv txwv li nyob rau hauv uas tus naj npawb lub caij yog finite yog hais tias yog ib tug finiteset.
- Infinite teeb.
- Sib npaug.
- Null teeb / khoob teeb.
- Subset.
- Tsim nyog.
- Kev teeb tsa tsis raug.
Pom zoo:
Dab tsi yog tus lej ntuj thiab tus lej suav nrog piv txwv?
Cov lej ntuj yog tag nrho cov lej 1, 2, 3, 4… Lawv yog cov lej koj feem ntau suav thiab lawv yuav txuas ntxiv mus rau qhov tsis muaj tseeb. Tag nrho cov lej yog txhua tus lej suav nrog 0 piv txwv. 0, 1, 2, 3, 4… Cov zauv suav nrog tag nrho cov lej thiab lawv qhov tsis zoo sib piv xws li.
Dab tsi yog cov lej suav tag nrho cov lej suav lej thiab lej lej?
Cov lej tiag yog feem ntau muab faib ua cov lej tsis sib haum xeeb thiab tsis sib haum xeeb. Cov zauv rational suav nrog tag nrho cov lej thiab feem. Txhua tus lej tsis zoo thiab tag nrho cov lej ua rau cov lej suav. Tag nrho cov lej suav nrog txhua tus lej ntuj thiab xoom
Nyob rau theem twg S yog cov molecules tuav nyob rau hauv ib daim ntawv teev?
khov kho Ntawm no, nyob rau theem S twg yog cov molecules tuav nyob rau hauv cov duab meej? Khoom Ib yam li ntawd, qhov kub thiab txias cuam tshuam li cas rau theem hloov? Cov cua sov yog siv los rhuav tshem cov kev sib txuas ntawm cov dej khov molecules thaum lawv tig mus ua kua theem .
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
Dab tsi yog qhov txawv ntawm instantaneous thiab nruab nrab ceev dab tsi yog qhov piv txwv loj tshaj ntawm kev ceev ceev?
Qhov nruab nrab ceev yog qhov ceev nruab nrab ntawm lub sijhawm. Instantaneous ceev yuav yog qhov ceev txhua qhov muab tam sim ntawd hauv lub sijhawm ntawd, ntsuas nrog lub ntsuas ntsuas lub sijhawm