Cov txheej txheem:
Video: Yuav ua li cas koj nrhiav tau qhov chaw saum npoo ntawm ib qho khoom?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yuav nrhiav tau thaj chaw saum npoo ntawm lub prism (los yog lwm yam geometric khov kho ) peb qhib lub khov kho zoo li lub thawv ntawv thiab ua kom 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 lub hauv paus cheeb tsam B, los ntawm qhov siab h.
Kuj paub, thaj tsam ntawm cov khoom yog dab tsi?
Nto - cheeb tsam . Yog ib khov kho yog tsim los ntawm cov chaw tiaj tus, xws li lub voos xwmfab ntawm sab xis, lub thaj chaw saum npoo tsuas yog qhov sum ntawm cov thaj chaw ntawm qhov chaw tiaj tus (hu ua ntsej muag). Yog li, piv txwv li, yog tias txhua tus ntug ntawm lub voos xwmfab muaj qhov ntev s, qhov cheeb tsam ntawm ib lub ntsej muag yog s2 vim nws yog square.
Ib yam li ntawd, tus qauv ntawm lub cev yog dab tsi? Formulas rau ntau yam Cov duab Qhov chaw saum npoo ntawm ntau yam cov duab zoo yog muab hauv qab no: Cuboid: 2 (lb + bh + hl), qhov twg l, b thiab h yog qhov ntev, dav thiab qhov siab ntawm ib lub cuboid. kub:6a2, a yog sab ntawm lub kub. Lub tog raj kheej: 2πr (r + h), r yog lub vojvoog ntawm puag ncig thiab h yog qhov siab ntawm lub tog raj kheej.
Ib sab ntawm qhov no, koj yuav nrhiav tau thaj tsam li cas?
Yuav ua li cas nrhiav thaj tsam ntawm Rectangular Prisms:
- 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, 3 cm.
Tag nrho cov cheeb tsam ntawm ib lub sphere yog dab tsi?
Qhov nkhaus thaj tsam ntawm ib lub sphere yog 4(pi)r^2 or (pi)d^2.
Pom zoo:
Dab tsi yog qhov hloov pauv kev sib raug zoo ntawm ntim thiab thaj chaw saum npoo raws li qhov khoom loj dua?
Raws li lub voos xwmfab loj zuj zus los yog lub xov tooj ntawm tes tau loj dua, ces thaj tsam ntawm qhov ntim rau qhov sib piv - SA: V piv txo. Thaum ib yam khoom / cell me me, nws muaj thaj tsam loj rau qhov ntim piv, thaum lub khoom loj / cell muaj thaj tsam me me rau qhov ntim piv
Yuav ua li cas koj nrhiav tau tag nrho saum npoo ntawm ib tug kheej kheej?
Txhawm rau nrhiav thaj chaw saum npoo ntawm ib tus kheej kheej, siv qhov sib npaug 4πr2, qhov twg r sawv cev rau lub vojvoog, uas koj yuav muab nws tus kheej rau square nws. Tom qab ntawd, muab cov squared radius los ntawm 4. Piv txwv li, yog tias lub vojvoog yog 5, nws yuav yog 25 npaug 4, uas sib npaug 100
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)
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