Isayensi

Izinto: Incazelo yokushisa, ukuqhuba ukushisa, umthamo wokushisa

Wake waphuza itiye elibandayo, ubisi olubandayo, isiraphu ebandayo, njll.? Nokho, lapho senza itiye elibandayo, sivame ukuxuba amanzi ashisayo noma afudumele engilazini enama-cubes eqhwa. Amanzi ashisayo noma amanzi afudumele anezinga lokushisa eliphakeme, kuyilapho ama-cubes eqhwa enezinga lokushisa eliphansi. Ngemva kokuthinta isikhashana, ingxube yama-cubes eqhwa netiye elishisayo iphenduka itiye elibandayo (ingxube yama-cubes eqhwa netiye elifudumele ifinyelele izinga lokushisa elifanayo). Inqubo efanayo iyenzeka lapho sihlanganisa amanzi ashisayo namanzi abandayo. Ngemva kokuthinta, amanzi ashisayo namanzi abandayo aphenduka amanzi afudumele (ingxube yamanzi ashisayo namanzi abandayo ifinyelele izinga lokushisa elifanayo). Kungani lezi zinto zingafinyelela izinga lokushisa elifanayo ngemva kokuthinta?

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Izinto ezichaza izinga lokushisa, iphuzu lokuqandisa, iphuzu lokubila

Wake wathinta iqhwa? Uzizwa kanjani uma isandla sakho sithinta iqhwa noma isandla sakho sifakwa esiqandisini? Kuthiwani uma lokho okuthintayo kungumlilo? Uma uthinta iqhwa, isandla sakho sizizwa sibanda, ngokuphambene nalokho uma uthinta umlilo, isandla sakho sizizwa sishisa. Kusho ukuthini ngempela ukushisa, ukufudumala, ukubanda, kanye nokubanda?

Incazelo Yokushisa

Umqondo wokushisa empeleni uvela emizweni yokushisa nokubanda etholakala yimizwa yethu yokuthinta. Ngokusekelwe kulokho okubonwa yimizwa yethu yokuthinta, sithi into ethile ishisa kakhulu kunenye noma ibanda kakhulu kunenye. Izinto ezishisayo kakhulu zinezinga lokushisa eliphakeme, kuyilapho izinto ezibandayo zinezinga lokushisa eliphansi. Uma into ibanda kakhulu, izinga lokushisa layo liphansi. Ngokuphambene nalokho, uma into ishisa kakhulu, izinga lokushisa layo liphakeme. Izinga lokushisa liyisilinganiso sokuthi into ishisa kangakanani noma ibanda kangakanani.

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Ukuqonda Izinga Lokushisa Nokushisa

Izinga lokushisa . Umqondo wokushisa empeleni uvela ekuzweni kokushisa nokubanda okubonwa umuzwa wethu wokuthinta. Ngokusekelwe kulokho umuzwa wethu wokuthinta okuzwakalayo, sithi into ishisa kakhulu kunenye into noma into ibanda kakhulu kunenye into. Izinto ezishisayo zinezinga lokushisa eliphakeme kuyilapho izinto ezibandayo zinezinga lokushisa eliphansi. Uma into ibanda kakhulu, izinga lokushisa layo liphansi. Ngokuphambene nalokho, uma into ishisa kakhulu, izinga lokushisa layo liphakeme. Lesi silinganiso sokushisa noma ukubanda kwento sibizwa ngokuthi izinga lokushisa. Esihlokweni se-kinetic theory yamagesi esizofundwa kamuva ebangeni le-11, uzoqonda ngokujulile incazelo yokushisa; kwenzekani kuma-molecule akha into leyo into engayizwa ishisa, ifudumele, ipholile noma ibanda.

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Incazelo yamayunithi aphesheya

Uhlelo Lwezinyunithi

Isibonelo, uma ulinganisa ubude bakho bese ububika njengo-100, umphumela awunamsebenzi. Ngokufanayo, uma ulinganisa isisindo somzimba wakho bese ububika njengo-20, umphumela nawo awunamsebenzi futhi awuqondakali kwabanye. Ngaphandle kokubika inombolo noma isibalo esithile, isilinganiso kumele sihambisane neyunithi. Uma uthi ukuphakama kwakho kungama-fathom ama-2, khona-ke u-2 yinombolo yokulinganisa kanti ama-fathom yiwo amayunithi owasebenzisayo. Abantu abajwayele ukusebenzisa ama-fathom bayaqonda lesi silinganiso. Noma, uma ulinganisa ubude betafula olisebenzisa ekilasini bese ububika njengobubanzi obu-5, umphumela uyaqondakala kwabanye abasebenzise ububanzi njengeyunithi.

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Izinhlelo ezahlukene zamayunithi

Singaguqula amayunithi kusuka ohlelweni olulodwa lwamayunithi kuya kolunye, njengokusuka ohlelweni lwaseBrithani kuya ohlelweni lwamazwe ngamazwe , noma ngokuphambene nalokho. Isibonelo, uma silinganisa ubude betafula sisebenzisa irula ngamasentimitha (uhlelo lwaseBrithani) futhi sifuna ukuveza ubude ngamamitha (uhlelo lwamazwe ngamazwe), singaguqula isilinganiso kusuka kumasentimitha kuya kumamitha. Lokhu kuguqulwa kungenziwa kusetshenziswa isici sokuguqula.

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Ubuningi obutholakalayo buyinani elibonakalayo elitholakala kunani elilodwa noma ngaphezulu eliyisisekelo . Ngaphezu kwamanani ayisisekelo ayisikhombisa, amanye amanani abonakalayo nawo ayinani elitholakalayo.

Ithebula lobuningi, amafomula namayunithiIndawo itholakala ngobuningi obubili bobude: ubude nobubanzi. Umthamo utholakala ngobuningi obuthathu bobude: ubude, ububanzi, nokuphakama. Isivinini sitholakala ngobuningi obubodwa bobude (ibanga) kanye nenani elilodwa lesikhathi. Ukusheshisa kutholakala ngobuningi obubodwa bobude (ibanga) kanye nenani elibodwa lesikhathi. Ubuningi butholakala ngobuningi obubodwa bobunzima kanye nenani elibodwa lobude. Amandla atholakala ngobuningi obubodwa bobunzima, inani elilodwa lobude, kanye nenani elibodwa lesikhathi.

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I-Pengertian

Ubuningi obuyisisekelo buyinani elingokoqobo amayunithi alo anqunywe kusengaphambili futhi angatholakali kwamanye amanani. Ngo-1971, iNgqungquthela Jikelele Yezisindo Nezilinganiso yasungula ubuningi obuyisikhombisa obungokoqobo njengenani eliyisisekelo . Ubuningi obuyisikhombisa (7), kanye namayunithi nobukhulu bawo, buboniswe kuthebula elingezansi.

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2 Izibonelo zemibuzo yokulingana komzimba eqinile

I-1. F₁ = 10 N, F₂ = 15 N kanye no-F₄ = 10 N, isebenza kubhulokhi i-ABCD njengoba kuboniswe esithombeni. Ubude bebhulokhi i-ABCD bungamamitha angu-20. Thola u-F₃ ukuze ibhlokhi libe se-static equilibrium. Unganaki ubunzima bebhlokhi.
Ingxoxo:

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Izibonelo ezi-4 zezinkinga ze-Fluid Continuity Equation

1. Ingxenye eyodwa yepayipi inobubanzi obungama-20 cm kanti enye inobubanzi obungama-10 cm. Uma izinga lokugeleza kwamanzi engxenyeni enkulu yepayipi lingu-30 cm/s, khona-ke izinga lokugeleza kwamanzi engxenyeni encane yepayipi lingu...
A. 80 cm/s
B. 100 cm/s
C. 120 cm/s
D. 130 cm/s
E. 140 cm/s
Ingxoxo:

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