Video: Dab tsi yog qhov cross section ntawm lub voos xwmfab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
ib tug point (ib tug vertex ntawm lub kub ) ib line ntu (ib ntug ntawm lub kub ) ib daim duab peb sab (yog tias peb lub ntsej muag nyob ib sab ntawm lub kub yog intersected) ib tug parallelogram (yog hais tias ob khub ntawm opposite ntsej muag intersected - qhov no muaj xws li ib tug rhombus los yog duab plaub) ib tug trapezium (yog hais tias ob khub ntawm.
Tom qab ntawd, qhov chaw hla ntawm ib lub voos xwmfab yog dab tsi?
Cov Hla - ntu ntu ntawm kub yog txhais raws li tus cheeb tsam ntawm ib lub ntsej muag uas yog lub ntsej muag thaum koj txiav lub kub parallel thiab perpendicular rau lub ntsej muag. Koj tuaj yeem txiav cov kub ntawm txhua qhov chaw ntawm lub ntsej muag ntawm a kub , tab sis nco ntsoov txiav nws thaum uas tig mus rau ib lub ntsej muag thiab tib lub sij hawm nws yog perpendicular mus rau lwm lub ntsej muag.
Kuj Paub, dab tsi yog qhov cross section ntawm ib lub prism? Cov hla ntu yog a duab plaub . Cov hla ntu ntawm tej cai prism parallel rau nws lub hauv paus yog congruent rau lub hauv paus. Daim duab 2 qhia cov hla ntu ntawm ib txoj cai rectangular prism perpendicular rau nws lub hauv paus. Cov hla ntu yog a duab plaub.
Yog li ntawd, koj yuav piav qhia txog ntu ntu li cas?
A hla ntu yog cov duab peb tau txais thaum txiav ncaj los ntawm ib yam khoom. Cov hla ntu ntawm cov khoom no yog daim duab peb sab. Nws zoo li kev pom rau sab hauv ntawm ib yam dab tsi uas tau txiav los ntawm nws.
Ib qho kev hla ntawm lub voos xwmfab puas tuaj yeem yog pentagon?
Lub pentagonal prism yog hlais nrog lub dav hlau sib npaug rau lub hauv paus. Qhov no txhais tau tias cov hla ntu yog a pentagon uas yog congruent rau lub hauv paus. Thaj tsam ntawm hla ntu yog 15 square inches. Qhov no txhais tau hais tias thaj tsam ntawm lub hauv paus yog 15 square inches.
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 lub voos xwmfab hauv paus ntawm 40 hauv daim ntawv radical?
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Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua