Izifundo Eziyisisekelo Zefiziksi

Isihloko mayelana ne-Poiseuilles equation

Isibalo sikaPoiseuille satholakala nguJean Louis Marie Poiseuille (1799-1869). Njengoba kuchaziwe, uketshezi ngalunye lungabhekwa njengoketshezi olufanele. Uketshezi olufanele alunawo umswakama. Uma sicabanga ukuthi uketshezi olufanele lugeleza epayipini, ingxenye ngayinye yoketshezi ihamba ngesivinini esifanayo (v). Ngokungafani noketshezi olufanele, uketshezi lwangempela esiluthola ekuphileni kwansuku zonke lunomswakama. Ngoba lunomswakama, khona-ke uma lugeleza epayipini, isibonelo, izinga lengxenye ngayinye yoketshezi liyahlukahluka. Ungqimba loketshezi oluphakathi luhamba ngokushesha (v ejulile), ngokuphambene nalokho, ungqimba loketshezi olunamathele epayipini aluhambi (v = 0). Ngakho-ke kusukela maphakathi kuya emaphethelweni epayipi, yonke ingxenye yoketshezi ihamba ngesivinini esihlukile. Ukuze kube lula ukuqonda kwakho, bheka isithombe esingezansi.

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Uketshezi, kokubili izinto eziwuketshezi kanye negesi zezinhlobo ezahlukene, zinamazinga ahlukene e-viscosity. I-Viscosity iwukungqubuzana phakathi kwama-molecule akha uketshezi. Ngakho-ke, ama-molecule akha ukungqubuzana koketshezi lapho uketshezi lugeleza. Kuketshezi, i-viscosity ibangelwa amandla okuhlangana (adonsa amandla phakathi kwama-molecule afanayo). Kanti ezintweni zegesi, i-viscosity ibangelwa ukungqubuzana phakathi kwama-molecule.

Uketshezi oluwuketshezi kulula ukulugeleza, isibonelo, amanzi. Ngokuphambene nalokho, uketshezi olujiyile kunzima ukulugeleza, isibonelo, uketshezi olugcotshwe. Ungafakazela ngokuthela amanzi kanye noketshezi endaweni ethambekele. Amanzi ageleza ngokushesha kunamafutha. Izinga lokuthamba koketshezi nalo lincike ekushiseni. Lapho izinga lokushisa loketshezi liphezulu, uketshezi luyancipha. Isibonelo, lapho umama ethosa inhlanzi ekhishini, uwoyela wokupheka oqala ukujiya uba uketshezi oluningi uma ushiswa. Ngokuphambene nalokho, lapho izinga lokushisa loketshezi oluwuketshezi luphakeme, kulapho uketshezi oluwuketshezi luba lukhudlwana.

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Amandla Okubumbana Nokunamathela

Amandla okubumbana amandla okubumbana phakathi kwama-molecule entweni efanayo, kuyilapho amandla okubumbana phakathi kwama-molecule ento engalingani abizwa ngokuthi Amandla Okubumbana. Isibonelo, sithela amanzi engilazini. Ukubumbana kwenzeka lapho ama-molecule amanzi edonselana, kuyilapho ukunamathelana kwenzeka lapho ama-molecule amanzi nama-molecule engilazi edonselana.

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Wake wadlala amabhamuza ensipho? Ibhamuza ensipho liyindilinga. Liyahlekisa. Lingapheshulwa. Ngemva kokundiza, amabhamuza ensipho ayaqhuma. Wow, kumnandi, umdlalo wobuntwana. Kungani ibhamuza ensipho liyindilinga?

Sicela uvuke ekuseni, bese uqaphela amaqabunga azungeze indlu. Qaphela amaconsi amazolo anamathele emaqabunga. Kuyamangaza; amaconsi amazolo ayindilinga. Kungaba kanjani lokho?

Ukucindezeleka kobuso kwenzeka ngoba ubuso boketshezi buvame ukuqina ukuze ubuso bubukeke njengolwelwesi oluncane. Lokhu kuthonywa amandla okuhlangana phakathi kwama-molecule amanzi. Ukuze uqonde kangcono le ncazelo, cabanga ngomfanekiso olandelayo. Sibuyekeza uketshezi olusesitsheni.

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Isihloko mayelana nesimiso sika-Archimedes

Umkhumbi onobunzima obukhulu awucwili, kanti itshe elincane lingacwili. Kungani kunjalo? Impendulo iqondile uma uqonda umqondo wokuntanta kanye nesimiso sika-Archimedes.

Empilweni yansuku zonke, sizothola ukuthi izinto ezifakwa oketshezini, njengedwala, zinesisindo esincane kunalapho izinto zingekho oketshezini. Ungase ukuthole kunzima ukuphakamisa itshe phansi, kodwa itshe elifanayo liphakanyiswa kalula lisuka phansi emanzini olwandle. Lokhu kungenxa yamandla okugeleza. Ukuqina kwenzeka ngenxa yokwehluka kokucindezela koketshezi ekujuleni okuhlukene. Ukucindezela koketshezi kuyanda ngokujula, lapho uketshezi lujiya, kulapho ukucindezela koketshezi kuba kukhulu. Lapho into ifakwa oketshezini, kuzoba nokwehluka kokucindezela phakathi koketshezi oluphezulu lwento noketshezi oluphansi lwento. Uketshezi olutholakala phansi kwento lunokucindezela okuphezulu kunoketshezi oluphezulu lwento.

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Isihloko mayelana nesimiso sikaPascals

Usetshenziswa kanjani umgomo wokuphakamisa i-hydraulic ukuphakamisa imoto? Uyini umgomo wokusebenzisa amabhuleki e-hydraulic uma usetshenziswa ukunciphisa ijubane lemoto? Sicela ufunde umgomo kaPascal ukuze ukuqonde lokhu.

Lonke uketshezi luhlala lucindezela zonke izinto ezithintana nalo. Amanzi esiwafaka engilazini azocindezela odongeni lwengilazi. Ngokufanayo, uma sigeza echibini lokubhukuda noma emanzini olwandle, amanzi echibi noma amanzi olwandle nawo acindezela umzimba wethu wonke.

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Isihloko mayelana nokucindezela koketshezi

Ku -physics, ingcindezi ichazwa njengamandla endaweni ngayinye, lapho isiqondiso samandla siqonde endaweni engaphezulu. Ngokwezibalo, ingcindezi ivezwa yi-equation P = F / A, lapho u-P = ingcindezi, u-F = amandla kanye no-A = indawo engaphezulu. Iyunithi yamandla (F) yi-Newton (N), iyunithi yendawo iyimitha yesikwele (m ² ). Ngenxa yokuthi ingcindezi ingamandla endaweni ngayinye, iyunithi yokucindezela yi-N/m ^2. Elinye igama le-N/m ² yi-Pascal (Pa). UPascal wasetshenziswa njengeyunithi yokucindezela ukuhlonipha uBlaise Pascal.

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Isihloko mayelana nobuningi kanye nobukhulu obuthile

Ubuningi

Isici esibalulekile sento ukuminyana. Ubuningi buyisilinganiso sobuningi nobuningi. Kubhalwe ngokwezibalo:

ρ = m / V

U-ρ (rho) uhlamvu lwesiGreki oluvame ukusetshenziswa ukuveza ubuningi, u-m uyisisindo kanti u-V uyivolumu. Ubuningi boketshezi olufana luhlukile kubuningi bento eqinile efanayo. Insimbi, isibonelo, inobuningi obufanayo engxenyeni ngayinye. Emkhathini woMhlaba, lapho umoya uphakeme ebusweni boMhlaba, ubuningi bawo buncane, kanti emanzini olwandle, lapho amanzi olwandle ejula, ubuningi bawo bukhulu. Ubuningi boketshezi olufana ncamashi bungancika ezintweni zemvelo ezifana nokushisa kanye nokucindezela.

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Isihloko mayelana nokusetshenziswa kwesimiso seBernoullis kanye nesibalo seBernoullis

Ithiyori kaTorricelli

Enye yezindlela zokusebenzisa i-equation kaBernoulli ukubala ijubane lokuphuma koketshezi phansi kwesitsha (bheka isithombe).

Sisebenzisa i-equation kaBernoulli endaweni 1 (ubuso besitsha) kanye nephuzu 2 (ubuso bomgodi). Ngenxa yokuthi ububanzi bomgodi ongaphansi kwesitsha buncane kakhulu kunobubanzi besitsha, ijubane loketshezi ebusweni besitsha libhekwa njengo-zero (v ₁ = 0). Ubuso besitsha kanye nobuso bomgodi kuvulekile ukuze ingcindezi ilingane nengcindezi yomoya (P ₁ = P ₂ ). Ngakho-ke, i-equation kaBernoulli yalesi simo ithi:

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Isihloko mayelana nesimiso sikaBernoullis kanye nesibalo sikaBernoullis

Uma sigibela isithuthuthu, izingubo esizigqokayo ziyavuvukala emuva. Ngezinye izikhathi, uma umoya uvunguza ngamandla, umnyango ungazivala. Nakuba umoya uvunguza ngaphandle kwendlu, kuyilapho umnyango ungaphakathi endlini.

Lokhu kungachazwa kusetshenziswa isimiso sikaBernoulli. UDaniel Bernoulli (1700-1782) wathola isimiso esingasetshenziswa ukuchaza lesi simo esingenhla.

Isimiso sikaBernoulli

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