Ukusetshenziswa kwesimiso sikaBernoulli
1. Izitatimende ezisekelwe esimisweni sikaBernoulli zithi …
(1) amandla okuphakamisa endizeni
(2) iphampu ye-hydraulic
(3) izifutho zomiyane
(4) ibhaluni lomoya oshisayo
Isixazululo
Izitatimende ezisekelwe esimisweni sikaBernoulli yilezi:
(1) amandla okuphakamisa izindiza kanye
(3) izifutho zomiyane
(2) Iphampu ye-hydraulic ngaphansi komgomo kaPascal
(4) Ibhaluni lomoya elisekelwe esimisweni sika-Archimedes
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2. Izitatimende eziphathelene nokusetshenziswa kwesimiso sikaBernoulli yilezi …
(1) imitha ye-venturi
(2) izifutho zomiyane
(3) i-barometer
(4) i-thermometer
Isixazululo
Izitatimende ezisekelwe esimisweni sikaBernoulli yilezi:
(1) imitha ye-venturi kanye
(2) isifutho somiyane
(3) i-barometer esekelwe ekucindezelweni kwe-hydrostatic
(4) i-thermometer ye-mercury noma i-alcohol ngokusekelwe ekukhuleni
3. Amathuluzi asekelwe esimisweni sikaBernoulli yilawa …
(1) iphampu ye-hydraulic
(2) i-carburetor
(3) imitha ye-venturi
(4) i-thermometer
Isixazululo
(2) i-carburetor kanye
(3) imitha ye-venturi
(1) iphampu ye-hydraulic esekelwe ekucindezelweni kwe-hydrostatic, umthetho kaPascal
(4) i-thermometer ye-mercury noma yotshwala ngokusekelwe ekukhuleni
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4. Amaphiko ezindiza aklanyelwe ukuba namandla okuphakamisa aphezulu , njengesithombe. Uma u-v kuyijubane lokugeleza komoya kanti u-P kuyingcindezi yomoya, khona-ke ngokwesimiso sikaBernoulli, umklamo wenziwe ngendlela yokuthi …
Isixazululo
Ukuze amaphiko endizeni aphakamele phezulu, umoya ophonswa phansi kwephiko mkhulu kunamandla ophonswa phezulu kwephiko.
Amandla okusunduza ngaphansi kwephiko makhulu uma ingcindezi yomoya phansi kwephiko inkulu. P = F / A, lapho ingcindezi ka-P ilingana ngqo no-F. Uma ingcindezi inkulu khona-ke amandla nawo ayakhula.
Isimiso sikaBernoulli sithi ingcindezi yomoya phansi kwephiko inkulu uma ijubane lomoya phansi kwephiko lincane.
v A > v B s o ukuthi P A <P B
1. Umbuzo: Uyini umgomo kaBernoulli?
Impendulo: Isimiso sikaBernoulli sithi ngokugeleza okungabonakali koketshezi olungahambisi umoya, ukwanda kwesivinini soketshezi kwenzeka ngesikhathi esisodwa nokwehla kwengcindezi engaguquki noma ukwehla kwamandla angase abe khona oketshezini.
2. Umbuzo: Isimiso sikaBernoulli sihlobene kanjani nokongiwa kwamandla?
Impendulo: Isimiso sikaBernoulli siwukubonakaliswa kokulondolozwa kwamandla ukuze kugeleze uketshezi. Amandla aphelele ohlelweni loketshezi olugeleza njalo ayalondolozwa. Njengoba amandla okuhamba koketshezi (isivinini) anda, amandla alo angase abe khona (ingcindezi) ayancipha, futhi okuphambene nalokho.
3. Umbuzo: Kungani amaphiko ezindiza enengxenye ephezulu egobile kanye nengxenye engezansi eyisicaba?
Impendulo: Amaphiko endiza (ama-airfoil) aklanywe ngengxenye ephezulu egobile kanye nengxenye engezansi eyisicaba ukuze kwenziwe ukuhamba komoya kusheshe ngaphezu kwengxenye ephezulu kunengxenye engezansi. Ngokomgomo kaBernoulli, lokhu kubangela ingcindezi ephansi phezulu kanye nengcindezi ephezulu phansi, okuholela ekuphakameni.
4. Umbuzo: Isimiso sikaBernoulli sikuchaza kanjani ukusebenza kwe-venturi meter?
Impendulo: I-venturi meter inesigaba esinciphile lapho isivinini soketshezi sanda khona, okuholela ekwehleni kokucindezela. Ngokulinganisa umehluko wokucindezela phakathi kwezingxenye ezinciphile nezinganciphile, umuntu anganquma izinga lokugeleza koketshezi, esebenzisa isimiso sikaBernoulli.
5. Umbuzo: Kungani ibhola lebhola elijikelezayo lijika endleleni yalo?
Impendulo: Lokhu kungenxa yomphumela weMagnus. Njengoba ibhola lijikeleza, lisheshisa umoya ngakolunye uhlangothi bese liwehlisa ijubane ngakolunye. Ngokusekelwe esimisweni sikaBernoulli, lokhu kuholela ekwehlukeni kwengcindezi, okubangela ukuthi ibhola ligobe.
6. Umbuzo: Isimiso sikaBernoulli sihlobana kanjani nokusebenza kwe-atomizer noma i-perfume sprayer?
Impendulo: Uma umoya uvunguzwa phezulu kweshubhu le-atomizer, uyashesha, udale indawo yokucindezela okuphansi. Ukucindezela okuphezulu phansi kusunduza uketshezi phezulu kweshubhu, lapho luhlangana khona nomoya ohamba ngokushesha bese lufuthwa ngenkungu encane.
7. Umbuzo: Uphahla olugobile esakhiweni luyibeka kanjani ingozi uma kunemimoya enamandla?
Impendulo: Ngesikhathi somoya onamandla, umoya uhamba ngokushesha phezu kophahla olugobile uma kuqhathaniswa nophahla oluyisicaba. Umoya ohamba ngokushesha phezu kophahla olugobile udala indawo yokucindezela okuphansi, ngokusho komgomo kaBernoulli. Lo mehluko wokucindezela ungabangela umphumela wokuphakamisa, okungenzeka ulimaze uphahla.
8. Umbuzo: Kungani amafasitela avulekile emotweni ehambayo edala umphumela wokuphaphazela emaphepheni angaphakathi?
Impendulo: Njengoba imoto ihamba, isivinini somoya ngaphandle siphakeme kunesingaphakathi emotweni. Lokhu kudala umehluko wokucindezela ngenxa yesimiso sikaBernoulli, okwenza amaphepha aphephezele njengoba umoya uzama ukulinganisa ukucindezela.
9. Umbuzo: Isimiso sikaBernoulli singasichaza kanjani isiphakamiso esitholwa abasubathi be-kite?
Impendulo: I-kite, uma iphonswa emoyeni, isheshisa ukuhamba komoya ngaphezu kobuso bayo obuphezulu, idale indawo yokucindezela okuphansi. Ingcindezi ephezulu ngaphansi kwe-kite, uma iqhathaniswa nengcindezi ephansi phezulu, idala ukuphakama, okuvumela abasubathi be-kite ukuthi baphakanyiswe emanzini.
10. Umbuzo: Kungani ikhethini leshawa lidonswa ngaphakathi uma amanzi evuliwe?
Impendulo: Amanzi ashisayo avela eshaweni afudumeza umoya, okwenza ukhuphuke futhi asheshise ukuhamba komoya endaweni yokushawa. Lo moya ohamba ngokushesha udala ingcindezi ephansi ngaphakathi kwendawo yokushawa uma kuqhathaniswa nangaphandle. Ngenxa yalokho, ikhethini lokushawa lidonswa ngaphakathi ngenxa yomehluko wengcindezi ochazwe yisimiso sikaBernoulli.
