Video: Puas yog qhov ntim thiab qhov chaw saum npoo yog tib yam?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Dab tsi yog qhov txawv ntawm thaj chaw saum npoo thiab ntim ? Qhov chaw saum npoo yog qhov sum ntawm thaj chaw ntawm tag nrho cov ntsej muag ntawm lub cev muaj zog. Nws yog ntsuas nyob rau hauv square units. Ntim yog tus naj npawb ntawm cubic units uas ua kom muaj ib daim duab.
Ntawm no, qhov ntim thiab qhov chaw yog dab tsi?
Qhov chaw saum npoo thiab Ntim . Qhov chaw saum npoo thiab ntim yog xam rau tej yam peb-dimensional geometrical duab. Cov nto thaj tsam ntawm tej yam khoom muab yog tus cheeb tsam them los yog cheeb tsam occupied los ntawm nto ntawm qhov khoom. Qhov twg ntim yog tus nqi ntawm qhov chaw muaj nyob rau hauv ib yam khoom.
Tsis tas li ntawd, puas yog qhov ntim ib txwm muaj ntau dua li qhov chaw? Qhov nce hauv ntim yog ib txwm loj dua qhov nce hauv thaj chaw saum npoo . Rau cubes me me tshaj qhov no, thaj chaw saum npoo yog ntau dua txheeb ze ntim dua nws yog nyob rau hauv loj dua kub (wo ntim yog ntau dua txheeb ze thaj chaw saum npoo ).
Cov lus nug tseem yog, qhov txawv ntawm qhov ntim thiab cheeb tsam yog dab tsi?
Qhov kom muaj nuj nqis ntawm qhov chaw muaj los ntawm ib qho khoom hu ua ntim . Cov duab dav hlau muaj cheeb tsam thaum cov duab zoo muaj ntim . Thaj chaw piav txog tus nqi ntawm qhov chaw nyob, whereas ntim txiav txim siab lub peev xwm ntawm cov khoom khib nyiab. Ntawm qhov tsis sib xws, cov ntim ntsuas nyob rau hauv cubic units.
Tus qauv rau ntim yog dab tsi?
Xam Volume Tus formula kom pom lub ntim muab cov ntev los ntawm qhov dav los ntawm qhov siab . Qhov xwm zoo rau ib lub voos xwmfab yog tias qhov ntsuas ntawm txhua qhov ntev yog tib yam. Yog li ntawd, koj yuav multiply ntev ntawm ib sab peb zaug. Qhov no tshwm sim hauv cov qauv: Volume = sab * sab * sab.
Pom zoo:
Dab tsi yog qhov kev sib raug zoo ntawm thaj chaw saum npoo thiab ntim ntawm lub voos xwmfab?
Rau qhov cubes me dua qhov no, thaj chaw saum npoo yog ntau dua piv rau qhov ntim ntau dua li nws nyob hauv qhov loj dua (qhov ntim ntau dua piv rau thaj chaw saum npoo). qhia meej meej tias raws li qhov loj ntawm ib yam khoom nce (tsis hloov pauv), qhov piv txwv no txo qis
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
Qhov txawv ntawm thaj chaw saum npoo thiab thaj tsam sab nraud yog dab tsi?
Qhov chaw sab nraud yog thaj tsam ntawm txhua sab tsis suav nrog thaj tsam ntawm lub hauv paus. Tag nrho qhov chaw ntawm cov khoom yog qhov sib npaug ntawm thaj chaw ntawm tag nrho cov ntsej muag ntawm cov khoom
Dab tsi yog qhov kev sib raug zoo ntawm thaj chaw saum npoo thiab ntim ntawm ib lub sphere?
Rau ib tug kheej kheej, qhov chaw saum npoo yog S = 4 * Pi * R * R, qhov R yog lub vojvoog ntawm tus kheej thiab Pi yog 3.1415 Qhov ntim ntawm ib puag ncig yog V = 4 * Pi * R * R * R / 3. Yog li rau ib tug kheej kheej, qhov sib piv ntawm thaj chaw rau ntim yog muab los ntawm: S / V = 3 / R
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')