Umthamo lombhobho

Ukusetyenziswa iimilo zejiyometri eli luqhutywa ngokupheleleyo onke amacandelo ezoqoqosho, kushishino kunye njalo njalo. Kungenxa yoko le nto kusifikeleyo oku sifundo ukuze kakuhle izifundo kwikharityhulam yesikolo. Kodwa asingabo bonke kuthi kakuhle kakhulu eli inzululwazi umdla, ngoko ingqalelo sakho siya kucelwa ukuba ukukhumbula ukuba itankana nendlela ukubala umthamo wayo? Oko kukuthi, phambi kokuba wazi ukuba yintoni na umthamo lombhobho, kuyimfuneko ukuba siqonde ukuba babengama-. Isilinda - umzobo ngokomthamo, ezibandakanya ezi zinto zilandelayo: izangqa ezibini engumzekelo ezifanayo (ukulingana indawo izangqa) nokwakha itankana odibanisa ezi izangqa. Kodwa ke kukho enye imeko - isilinda kunye axis kwayo kufuneka aa Incopho zombini izangqa, oko kukuthi, omnye isangqa na ngokoqobo umfanekiso isibuko enye.

Siye wachaza mzekelo elula - ilungelo circular njengesilinda. Kodwa ke kubomi hi nga langutana nje kuphela ezo, kuba ngeyantlukwano yabo bukhulu kangangokuba ukuchaza kubo bonke nzima. Kodwa abayi kuhamba thina kwaye jonga kwi lombhobho zixhaphakileyo elula. Ngoko ke, ngoku siyazi ukuba lo mbhalo, kuyenzeka ukuba ukubala umthamo wayo. Yaye yintoni na le mali? Ngamanye amazwi, ungenza ukwenza uthelekiso kancinane - nto yokuqala umthamo wenqanawa. Ukususela kule nkcazelo, kucacile ukuba iimpawu ezinjalo asinakuba imilo tyaba, yaye-ntathu, kwaye Kojima njengesilinda.

Ngoku makhe Masishukume kancinane kumanani kunye izibalo. Ukuze ufumanise ukuba yeyiphi na umthamo lombhobho kuyimfuneko ukusebenzisa ifomula bonke ezaziwayo-kakuhle, apho ibalwe: V = πr² h

Ngoku cinga onke amaxabiso ifomula:

V - Cylinder umthamo;

π - pi;

r - embindini wesangqa;

h - ukuphakama njengesilinda.

Ngenxa umthamo lombhobho, sibonile ukuba la manani achazwe ye kwirediyasi le ecacileyo, yaye oko manani Pi ukuphakama lombhobho?

Pi - oqhubekayo ebonisa umlinganiselo la manani achazwe nobude ubukhulu bayo. Kukholelwa ukuba ngamanani ulingana 3.14. Nangona ngenene eli nani xa inxalenye elipheleleyo yi-10 ezigidi amanqaku (yobalo ngo-2011)! Kodwa lula, sisebenzisa ubungakanani eqhelekileyo, ngenxa yokuba akukho mfuneko izibalo eliphezulu-ngqo thina. Nangona, umzekelo, esithubeni esebenzisa elona nani liphezulu kangangoko loonobumba emva kwesishumi!

Cylinder ukuphakama - ngumgama nkqo phakathi moya zayo zombini, kwimeko yethu - izangqa. Indawo i wenkunkuma lombhobho. Yaye uninzi umdla kukuba eli xabiso lilingana ncam kulo lonke ubude lombhobho setyhula conjugated.

Ngoku uyazi yonke yezahlukileyo kwi lenxaki, kukho umbuzo wokuba ingaba, yaye ngoba? Makhe ukuchaza oku umzekelo bhokisi. Wonke umntu uyazi ukuba umthamo wayo lilingana imveliso zobukhulu ezintathu: ubude, bukwangako nobubanzi, ukuphakama. Indawo isiseko lo mzobo na imveliso ye ubude nobubanzi, ngamanye amazwi, Le ifunyenwe ukuba umthamo benziwa kwisiseko isikwere kunye nokuphakama. Ngoku, emva nesilinda wethu, yonke efanayo: V = Sh, apho S - ummandla isiseko cylinder, kususela isiseko thina isangqa, kwaye indawo isangqa yi: S = πr².

Ngoku siyazi indlela ukubala umthamo itankana, kodwa kusinika? Yintoni na isicelo eluncedo ulwazi? Kubomi bemihla ngemihla olu lwazi kumchiza, umzekelo, kunokwenzeka ukuba ukubala angakanani na amanzi bazalise enye okanye enye into zezindlu njengoko ziya kuhambelana izinto evakalala phakathi zezindlu kwisikhongozeli ethile. Nangona singakwazi ukwenza ngaphandle. Kodwa kushishino ngaphandle lwazi nje ayikwazi ukukwenza. Ngokomzekelo, xa imveliso kwemibhobho ngeenjongo ezahlukeneyo Ungabala lukhulu kangakanani lolwelo okanye igesi, baya kudlula iyunithi kwexesha, njalo njalo nganye