Izifundo Eziyisisekelo Zefiziksi

Isihloko mayelana ne-Equation of continuity

Zama ukuvula impompi yamanzi kancane ngenkathi unaka ijubane lamanzi aphuma emlonyeni wempompi. Manje qhathanisa, izinga lokugeleza kwamanzi lishesha kangakanani, uma umlomo wempompi uvaliwe noma cha? Kungani kunjalo? Ukuze uqonde lokhu, sicela ufunde i-continuity equation.

Ukusakaza

Ekugelezeni okuzinzile, ijubane lenhlayiya ngayinye yoketshezi endaweni ethile, ake sithi iphuzu A lihlala lifana. Lapho kudlula iphuzu B, ijubane lezinhlayiya zoketshezi lingashintsha. Kodwa-ke, lapho zifika endaweni B, izinhlayiya zoketshezi ezilandela ngemuva zigeleza ngesivinini esifanayo nezinhlayiya zoketshezi ezandulelayo. Ngokufanayo lapho zifika endaweni C njalo njalo. Umugqa Wokugeleza uwumugqa oxhumanisa amaphuzu A, B, no-C.

Funda kabanzi

1. Incazelo yesimiso sabamnyama

Uma sixuba amanzi ashisayo nabandayo esitsheni esivulekile (isibonelo ibhakede), ukushisa kuyadlula kusuka emanzini ashisayo kuya emanzini abandayo. Ngenxa yokuthi isitsha sivulekile, khona-ke ukushisa okuthile kuyangena emoyeni. Isitsha siyafudumala futhi. Ukushisa okukhishwa ngamanzi ashisayo akugcini nje ngokumuncwa ngamanzi abandayo, kodwa futhi kuyamuncwa umoya nezitsha. Kulokhu, ibhakede liyisistimu engahlukanisiwe. Uma sixuba amanzi ashisayo nabandayo ku-thermos evaliwe, ukushisa kuyadlula kusuka emanzini ashisayo kuya emanzini abandayo. Ama-thermos ayizinhlelo ezihlukanisiwe, ngakho akukho ukushisa okuya emoyeni noma ku-thermos. Amanzi abandayo amunca kuphela ukushisa okukhishwa ngamanzi ashisayo kuze kube yilapho ingxube yamanzi ashisayo namanzi abandayo ifinyelela ekulinganisweni kokushisa.

Funda kabanzi

1. Incazelo yokudluliselwa kokushisa ngemisebe

Kuzizwa kanjani uma ugqoka izingubo ezimnyama ngosuku olushisayo, noma uzivocavoca nini emini? Uma ugqoka izingubo ezimnyama emini, uzizwa ushisa. Kungani kunjalo? Ibanga phakathi kwelanga nomhlaba ekuseni licishe lifane nebanga phakathi kwelanga nomhlaba emini nakusihlwa. Pho kungani ekuseni nakusihlwa kupholile, kushisa kakhulu emini? Izimpendulo zale mibuzo zihlobene nokudluliselwa kokushisa ngemisebe.

Funda kabanzi

Isihloko mayelana nokudluliselwa kokushisa nge-convection

Wake wake waya ngasogwini lolwandle lapho ilanga libalele? Ngosuku olucacile, ogwini lolwandle, kuhlale kunomoya ovunguzayo ovela olwandle. Kungani kuhlale kunomoya ogwini lolwandle, futhi kungani umoya wolwandle (imimoya evunguzayo esuka olwandle iya ezweni) uvela emini, umoya womhlaba (imimoya evunguzayo esuka ezweni iya olwandle) uvela ebusuku? Kungani ngesikhathi semvula amafu ehla aye emithambekeni? Kungani umoya uzizwa upholile? Izimpendulo zale mibuzo zihlobene nokushisa okuthile komhlaba nolwandle, ukwanda, ubuningi, kanye nokudluliselwa kokushisa nge-convection!

Funda kabanzi

1. Incazelo yokudluliselwa kokushisa ngokuqhutshwa komoya

Uma uhleli esihlalweni sokhuni, ubuso besihlalo sokhuni buyafudumala. Ngokuphambene nalokho, uma uhleli esihlalweni esenziwe ngepulasitiki noma ngensimbi, ubuso besihlalo sensimbi noma sepulasitiki abuzizwa bufudumele ngemva kokuhlala. Kungani ubuso besihlalo sokhuni bufudumala, kanti ubuso besihlalo sensimbi abufudumala? Kungani ukulala phansi okubandayo ngaphandle komatrasi kungabanga ubuhlungu? Wake wagqoka ijakethi elivimbela ukubanda? Kungani amajakethi amaningi avimbela ukubanda enziwe ngoboya? Kusenezinto eziningi ezingacatshangelwa futhi zibuzelwe ngazo ezihlobene nendaba yokudluliselwa kokushisa ngokuqhutshwa komoya.

Funda kabanzi

Isihloko mayelana nokushisa okucashile kanye nomthamo wokushisa

Uma ufaka i-thermometer ye-mercury esitsheni esinengxube yamanzi abandayo neqhwa, uzobona ngemva kokuhamba uye phansi, ubuso be-mercury buyayeka ukuhamba. Ubuso be-Mercury buyayeka ukuhamba ngemva kokufinyelela izinga lokushisa lendawo yokubanda yamanzi (0 ^o C). Uma isitsha sivulekile, ukushisa kuphuma emoyeni onezinga lokushisa eliphezulu kuya engxubeni yeqhwa namanzi abandayo. Ukwengezwa kokushisa okuvela emoyeni kubangela ukuthi iqhwa lincibilike. Uma nje iqhwa lincibilika, ingabe izinga lokushisa lengxube yeqhwa namanzi abandayo liyashintsha? Uma nje iqhwa lincibilika, izinga lokushisa lengxube yamanzi neqhwa alishintshi.

Funda kabanzi

Incazelo yesihloko sokushisa Okulingana nokushisa komshini Isilinganiso sokushisa

1. Incazelo yokushisa

Uma izinto ezinomehluko wokushisa zithintana, kuzoba nokudluliselwa kokushisa kusuka ezintweni ezinokushisa okuphezulu kuya ezintweni ezinokushisa okuphansi. Ukudluliselwa kokushisa kuyama ngemva kokuthinta izinto kufinyelela izinga lokushisa elifanayo. Isibonelo, uma sixuba amanzi ashisayo namanzi abandayo, ukushisa kuvame ukuhamba kusuka emanzini ashisayo kuya emanzini abandayo. Uma sifaka insimbi eshisayo emanzini abandayo, ukushisa kuhamba kusuka ensimbini kuya emanzini. Ukushisa kuzoyeka ukugeleza ngemva kokuba insimbi namanzi kufinyelele izinga lokushisa elifanayo. Lapho umhlengikazi enamathisela i-thermometer emzimbeni wakho, ukushisa kuhamba kusuka

Funda kabanzi

Isihloko mayelana nokuziphatha okungajwayelekile kwamanzi ngaphansi kuka-4°C

Into ngayinye iyakhula (ivolumu yezinto iyanda) lapho izinga lokushisa likhuphuka, futhi izinto ziyancipha (ivolumu yezinto iyancipha) lapho izinga lokushisa liyancipha. Amanzi ayanda futhi lapho izinga lokushisa likhuphuka futhi lincipha lapho izinga lokushisa lincipha, kodwa hhayi ku-0 ^° C – 4 ^° C. Phakathi kuka-0°C no-4°C, ivolumu yamanzi iyancipha (amanzi ancipha) njengoba izinga lokushisa likhuphuka. Uma sifudumeza amanzi ku-0 ^° C, amanzi ayashisa, ivolumu yamanzi iyancipha. Inqubo yokuncipha iyama lapho amanzi efika ku-4 ^° C. Ngaphezulu kuka-4 ^° C, ivolumu yamanzi iyanda njengoba izinga lokushisa likhuphuka. Esikhundleni salokho, amanzi ayakhula (ivolumu yamanzi iyanda) lapho izinga lokushisa lincipha kusuka ku-4 ^° C kuya ku-0 ^° C.

Funda kabanzi

Izinto eziningi eziqinile zithola ukwanda okuqondile lapho izinga lokushisa lishintsha. Ukwanda okuqondile ubude bento buyanda noma ubude bento buyancipha. Ngokuvamile, ubude bento buyanda lapho izinga lokushisa likhuphuka, kanti ubude bento buyancipha lapho izinga lokushisa lehla. Ungase ucabange ukuthi ukwanda okuqondile kungenzeka kuphela ezintweni ezifana nezintambo ezincane. Isibonelo, bheka imoto epakwe eceleni komgwaqo, ukuze ivezwe elangeni. Lapho imoto ishisa kakhulu, ipuleti lensimbi lingakhula, noma ubude obuseceleni bungakhula. Uphahla lwezindlu ezenziwe nge-zinc nalo lungakhula. Kulokhu, lapho i-zinc ishisa kakhulu, imiphetho ye-zinc iyanda ububanzi futhi i-zinc ingakhula ngisho nobukhulu. Into efanayo yenzeka emizileni yesitimela kanye nensimbi noma insimbi ebhulohweni.

Funda kabanzi

Isihloko mayelana nokuguqulwa kwezikali zokushisa

Isikali seCelsius kanye nesikali seFahrenheit ziyizilinganiso zokushisa ezahlukene. Uma izinga lokushisa lento lilinganiswa futhi livezwa esikalini seCelsius, khona-ke sifuna ukusho izinga lokushisa lento esikalini seFahrenheit bese silishintsha kusuka esikalini seCelsius siye esikalini seFahrenheit. Kulesi sigaba, sifunda ukushintsha noma ukuguqula isikali sokushisa.

Uma ingcindezi ingu-1 atm, izinga lokushisa lendawo yokubanda ye-thermometer ye-Celsius = 0 ^oC, kuyilapho i-thermometer ye-Fahrenheit = 32 ^oF. Ngokuphambene nalokho, ekucindezelweni okungu-1 atm, izinga lokushisa iphuzu lokubilisa kwe-thermometer yesikali se-Celsius = 100 ^oC, kuyilapho i-thermometer enesilinganiso se-Fahrenheit = 212 ^oF.

Funda kabanzi