KumiswaIsayensi

Yini enquma ingcindezi in the ketshezi negesi?

Njengoba sekushiwo, ingcindezi ngokoqobo elisizungezile. It likhona noma esihlokweni noma emzimbeni. Engingakusho nje ukuthi iyiphi into noma ophilayo ku surface eMhlabeni, ngokucindezela kontanga 100 kN / m2. Le ngcindezi kwekholomu emoyeni. Abantu once more azibonayo umfanekiso okubonakalayo ingcindezi njengoba amabutho iqondiswe esikhaleni afakiwe. Lokhu kuyiqiniso ngoba izitsha angawodwa. Ezitsheni evulekile, lesi sithombe - phetho ikhanda ingcindezi. Noma yimuphi ingcindezi kule igesi uketshezi - kuwumphumela "ukuziphatha" yezinhlayiya we indaba ngokwayo. Kasibili kweqiniso ngoba uketshezi, igesi nokugomela okuqinile ukuthi bakufake ingcindezi njengoba ubuningi ngokomzimba - ibutho ingqikithi uhlevane ku amangqamuzana ebusweni.

Yiqiniso physics aphansi kusaziwa ukuthi ifomula eyaziwa ingcindezi uketshezi futhi igesi ifomu:

F = ρ × g × h, [Pa]

Cabanga izingxenye indlela enjalo. Uma uthatha noma iyiphi ivolumu uketshezi / igesi ukucacisa ingcindezi endaweni yayo kungenzeka kanje. Ingcindezi - ungamandla isetshenziswa endaweni - F / S. Kuyaqondakala ngomunye umfundi. Manje bhala ukuthi ibutho enjalo ezisukela enkulungwaneni yesibili umthetho Newton - izikhathi mass umzimba ukushesha (kuleli cala - lapho uketshezi usebenza isimo ezolile - ukusheshisa gravity). Ngakwelinye ihlangothi, isisindo - iyona ukuminyana umkhiqizo ngevolumu elalihlala umzimba. Umqulu kungenziwa ukubola njengoba umkhiqizo endaweni ephakeme. Ngesimo ifomula sithola:

P = F / S = (m × g) / S = (V × ρ × g) / S = (S × h × ρ × g) / S = ρ × g × h

lapho P - ingcindezi, F - force, S - pdoschad, m - mass, g - khulula ukuwa ukushesha, V - ivolumu, ρ - ukuminyana, h - ukuphakama

Pa = N / m2 = (kg × m / s2) / m2 = (m3 × kg / M3 × m / s2) / m2 = (m2 × m × kg / M3 × m / s2) / m2 = m × kg / m3 × m / s2 = kg / (m × C2)

Lezi amayunithi ukukhombisa indlela kwakheka Pascal. Blez Paskal kwaba isazi bodumo, kuhlanganise emkhakheni physics. He is kumbhali yomthetho esiyisisekelo, esewuphendula: "Indlela yokuthola yokucindezela igesi ? Noma uketshezi lapho uphumule" Ngesisekelo isipiliyoni sakhe etholwe omunye imithetho eyisisekelo physics kanye hydraulics - ingcindezi emzimbeni (liquid noma igesi) nganoma isiphi isikhathi ekhethiwe ngokulinganayo phezu bonke ubuso, okuyinto baxhumana umzimba.

Okuningi isayensi yanamuhla - uhlelo wokubacindezela kuyinto ahlomile futhi umthetho, ne ubuqambi yayo - "Umthetho ingcindezi njalo." Uthi ingcindezi ketshezi njalo nganoma yingasiphi ketshezi, inqobo nje uma-ke kuthulile. Lezi izisekelo futhi wabeka isisekelo sokuba izibalo izinhlelo eziyinkimbinkimbi futhi manje kwenza ukuba adale engavamile izixazululo lobuchwepheshe. Namuhla, noma yiluphi uhlelo noma indlela esebenza uketshezi noma igesi, nakanjani ibalwa edlulele umkhawulo Amanani (aziwa kusukela ucwaningo ngezinto ezahlukene) akha ingcindezi kule ketshezi kanye negesi.

Uma sicabangela ingcindezi nge isimo ezolile ketshezi, kubalulekile ukuba ukhulume ingcindezi gidrostaticheskome. Uma sikhuluma Dynamics, efanele ongakhuluma ngakho ukwanda. Amanzi isando - into ezenzeka amathangi kanye amapayipi, ngenxa nokwenyuka yokucindezelwa nganoma iyiphi indawo. Zonke gidromehanizmy futhi izakhi zabo kubalwa ukuze kukhawulwe ingcindezi static futhi bafaka ukhonkolo iDemo - okhanda. Ngokwesibonelo, imbangela evamile ukwehluleka ompompi kuyinto isando amanzi nje. The Jump esikhulu onguthelawayeka umugqa ngifinyelele crane, futhi ehluleka (ngokugcwele noma ngokwengxenye).

Kuyathakazelisa ukuthi nakuba ketshezi incompressible, futhi (cishe) Ngakolunye uhlangothi, lesi ngcono ukudluliselwa umfutho. Ngakolunye - uma indlela kuyoba eside futhi kuyoba khona ukuphazamiseka (isibonelo, ukuhlunga yasendlini), isando amanzi namandla okucima ngaso ngokuphelele. Shintsha ingcindezi in the ketshezi kanye ikani igesi kanye nezinye izinto. Into yokuqala ukuthi livela ifomula - ushintsho ukuphakama indawo esitsheni. Lesi simiso ngenkuthalo ukusetshenziswa endulo, impucuko ezahlukene, kanye ngokucacile kungabonwa emizaneni. Namanje osale eSoviet Union amanzi kwemibhoshongo usebenza ngalendlela. Esikhulu umthamo wegazi kwe-futha booster ihlinzekwa ngamanzi ukuze ezingeni elithile. It is elawulwa ngokuzenzakalela - iflothi ithoyilethe yakho emthonjeni (uma ileveli iflothi liyaphuma futhi isigwedlo amvalele off amanzi). Ngokulandelayo, self-ukondla notshwala uketshezi, kusukela Ezingeni layo phezu ezwekazini, nokuvulwa incane.

Ngaphezu kwalokho, umfutho kungashintshwa ngokushintsha lokushisa. It kuthinta Isivinini yezinhlayiya, futhi kungakho unhlangothi izikhathi eziningana. Kunengqondo ukuphetha ngokuthi i-emikhulu kuba, ayanda kuyoba ingcindezi kule ketshezi kanye negesi. Kodwa ingabe kunjalo? Empeleni, akukho. Lapha kuba izindawo. Amanzi, isibonelo, ukushwaqa futhi anda ivolumu, futhi emoyeni - sinciphile. Isibonelo elula - onendlu engadini uyazi ukuthi ebusika kudingeka sokukhipha amanzi kusukela uhlelo amapayipi, amapayipi kanye valve musa liqhume. Esinye isibonelo emoyeni - kufuthwe ibhaluni, ngiyibeke ku esiqandisini ngoba 10 ... imizuzu engu-15. Uma wena ukhiphe it we- hla ngokushesha. Uma uthele amanzi ashisayo kusukela iketela, washeshe zigcwala.

Ingcindezi - into esinayo ukuphila hhayi kuphela, kodwa futhi ukuze kubhekwe. Cabanga akwazi nokuya ekujuleni okungamamitha noma umsindo wave ngokuduma eqinile. Njalo uqaphe futhi khumbula ukuthi ingcindezi - ukuhamba amangqamuzana, kanye nama-molecule - kukhona izingcezu ezincane zokuphila!

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