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Video: Koj ua li cas rau qhov chaw saum npoo?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov chaw saum npoo yog qhov sum ntawm thaj chaw ntawm tag nrho cov ntsej muag (los yog nto ) ntawm 3D duab. Ib lub cuboid muaj 6 lub ntsej muag. Yuav nrhiav tau thaj chaw saum npoo ntawm ib cuboid, addthe thaj chaw ntawm tag nrho 6 lub ntsej muag. Peb kuj ua tau daim ntawv lo qhov ntev (l), dav (w), thiab qhov siab (h) ntawm lub prism thiab siv theformula, SA = 2lw + 2lh + 2hw, los nrhiav qhov thaj chaw saum npoo.
Ua li no, koj yuav nrhiav tau thaj tsam li cas?
Yuav ua li cas nrhiav thaj tsam ntawm RectangularPrisms:
- Nrhiav thaj tsam ntawm ob sab (Length * Qhov siab) * 2 sab.
- Nrhiav thaj tsam ntawm sab uas nyob ib sab (Dav * Qhov siab) * 2 sab.
- Nrhiav thaj tsam ntawm qhov kawg (Length * Dav) * 2 kawg.
- Ntxiv peb thaj chaw ua ke kom pom thaj chaw saum npoo av.
- Piv txwv li: Qhov chaw saum npoo ntawm ib daim duab plaub prism 5 cm ntev, 3cm.
Ib tug kuj yuav nug, yog qhov chaw saum npoo squared los yog cubed? Saib Tawm: thaj chaw saum npoo tsuas yog ob-dimensionaland yog qhia raws li units squared , tsis units kub . Qhov no yog vim peb tsuas yog cuam tshuam nrog cov chaw tiaj tus, tsis yog qhov chaw sab hauv.
Ntxiv rau qhov no, thaj chaw saum npoo yog dab tsi hauv lej txhais?
Tag nrho cheeb tsam ntawm nto ntawm cov khoom peb-dimensional. Piv txwv: lub thaj chaw saum npoo ntawm acube yog cheeb tsam ntawm tag nrho 6 lub ntsej muag ntxiv ua ke.
Yuav ua li cas koj ua hauj lwm tawm thaj tsam ntawm ib tug prism?
Cov thaj chaw saum npoo ntawm tej prism yog tag nrho cheeb tsam ntawm tag nrho nws sab thiab ntsej muag. Ib daim duab peb sab prism muaj peb lub kaum sab xis thiab ob lub ntsej muag daim duab peb sab. Yuav nrhiav tau cheeb tsam ntawm cov duab plaub sab, siv cov qauv A = lw, where A = cheeb tsam , l = ntev, thiab h = qhov siab.
Pom zoo:
Yuav ua li cas koj nrhiav tau qhov chaw saum npoo ntawm ib qho khoom?
Txhawm rau nrhiav thaj chaw saum npoo ntawm lub prism (los yog lwm yam geometric khoom) peb qhib cov khoom zoo li lub thawv ntawv thiab flatten nws tawm kom pom tag nrho cov ntawv geometric. Txhawm rau nrhiav qhov ntim ntawm lub prism (nws tsis muaj teeb meem yog tias nws yog duab plaub lossis duab peb sab) peb muab cov cheeb tsam ntawm lub hauv paus, hu ua thaj tsam B, los ntawm qhov siab h
Koj pom qhov siab ntawm lub thawv li cas thaum muab qhov chaw saum npoo?
Nrhiav Yam Txog Lub Thawv A lub thawv feem ntau yog tus yam ntxwv ntawm nws qhov siab, thiab nws qhov dav, W, thiab nws qhov ntev L. Qhov dav, qhov siab, thiab qhov ntev ntawm lub thawv tuaj yeem sib txawv. Qhov ntim, lossis qhov chaw nyob hauv lub thawv yog h × W × L. Qhov chaw sab nraud ntawm lub thawv yog 2 (h × W) + 2 (h × L) + 2 (W × L)
Dab tsi yog qhov tseeb ntawm thaj chaw saum npoo rau qhov sib piv ntawm cov kab mob nyob?
Raws li qhov loj ntawm lub cev nce, nws thaj chaw saum npoo mus rau qhov sib piv qis. Qhov no txhais tau hais tias nws muaj qhov tsawg dua qhov chaw muaj rau cov khoom sib txawv, yog li tus nqi ntawm diffusion yuav tsis nrawm txaus kom tau raws li nws cov kev xav tau ntawm cov hlwb
Yuav ua li cas koj nrhiav tau qhov chaw saum npoo thiab ntim ntawm ib lub voj voog?
Qhov chaw saum npoo = (2 • π • r²) + (2 • π • r • qhov siab) Qhov twg (2 • π • r²) yog thaj tsam ntawm 'kawg' thiab (2 • π • r • siab ) yog thaj chaw sab nraud ( thaj tsam ntawm 'sab')
Vim li cas qhov chaw saum npoo rau qhov sib piv ntawm qhov tseem ceeb?
Qhov chaw rau qhov ntim qhov piv yog qhov tseem ceeb vim tias, raws li lub hnub nyoog ntawm tes thiab tsim cov khoom tseem ceeb xws li cov proteins nws loj tuaj. Cell tau loj dua, yog li nws qhov ntim tau loj dua, tab sis hmoov tsis zoo li ntim, thaj chaw ntawm lub xov tooj tsis tau loj dua sai