Mokhoa oa ho Bala Khatello ea Hydrostatic
Kgatelelo ya metsi a sa fetoheng ke mohopolo wa bohlokwa fisiks ya mokelikeli, o atisang ho bonwa bophelong ba letsatsi le letsatsi, ho tloha tshebetsong ya matamo, ditanka tsa metsi le dikepe tse ka tlasa metsi ho ya ho lekanya kgatello ya madi ka disebediswa tse itseng. Ka bokhutshwane, kgatelelo ya metsi a sa fetoheng ke kgatello e etswang ke mokelikeli o phomotseng ka lebaka la tshusumetso ya matla a kgoheli. Ha ntlha e tebile ka hara mokelikeli, kgatelelo e ba kgolo ka ntlha eo. Sengoloa sena se tla buisana ka tlhaloso, foromo, mehato ya ho bala, mathata a mehlala, le tshebediso e sebetsang ya kgatelelo ya metsi a sa fetoheng.
Ho Utloisisa Khatello ea Hydrostatic
Kgatelelo ke matla a sebetsang hodima bokahodimo ka sebaka sa yuniti. Mokelikeling o phomotseng, kgatelelo e hlaha ka lebaka la boima ba mokelikeli. Ka hona, kgatelelo ya hydrostatic e susumetswa ke botebo, bongata ba mokelikeli, le ho potlaka ha matla a kgoheli. Kgatelelo ena e sebetsa ka mahlakoreng ohle ka ho lekana sebakeng se itseng, kahoo mabota a setshelo, tlase ho letamo, le ntho efe kapa efe e qoelitsoeng mokelikeling e fumana kgatelelo e tswang mokelikeling.
Ketsahalo e bonoang habonolo e etsahala ha o qoela ka letamong kapa lewatleng: kgatello ditsebeng tsa hao e a eketseha ha o theohela tlase. Sena se etsahala hobane kgatello ya hydrostatic e eketseha ha botebo bo ntse bo eketseha.
Foromo ea Khatello ea Hydrostatic
Foromo ea motheo ea khatello ea hydrostatic botebong bo itseng ke:
P = ρ gh
Lintlha:
– P = kgatello ya hydrostatic (Pascal, Pa)
– ρ (rho) = bongata ba mokelikeli (kg/m³)
– g = ho potlaka ka lebaka la matla a khoheli (m/s²), ka kakaretso 9,8 m/s² kapa hangata ho potoloha ho 10 m/s² ho etsa hore lipalo li be bonolo
– h = botebo ho tloha holim'a metsi (m)
Foromo ena e sebetsa ho maro a tšoanang (botenya bo nkoa bo sa fetohe) le maro a phomolong.
Khatello e Felletseng (Haeba ho na le Khatello ea Bokaholimo)
Maemong a mang, bokaholimo ba mokelikeli le bona bo na le khatello e itseng, mohlala, khatello ea sepakapaka. Haeba re batla ho bala khatello eohle botebong ba h, joale:
Kakaretso ea P = P_surface + ρ gh
Bakeng sa libaka tse pepesehetseng moeeng, P_surface hangata ke khatello ea sepakapaka (hoo e ka bang 101.325 Pa boemong ba leoatle). Leha ho le joalo, mathateng a mangata a sekolo, khatello ea sepakapaka ka linako tse ling e hlokomolohuoa kapa e baloa ka thoko ha ho hlokahala.
Ke Hobane'ng ha Khatello ea Hydrostatic e Eketseha ka Botebo?
Ka khopolo-taba, ha ntlha e tebile ka har'a mokelikeli, boima ba kholomo ea mokelikeli bo ba boholo ka holim'a ntlha eo. Boima bona bo sutumelletsa tlase ntlheng e ka tlase ho eona, bo eketsa khatello.
Lintho tsa bohlokoa tseo u lokelang ho li utloisisa:
1. Kgatelelo ya metsi e sa fetoheng ha e itshetlehe ka sebopeho sa setshelo. Setshelo se selelele, se sesesaane kapa se sekgutshwane le se sephara se tla hlahisa kgatelelo e tshwanang botebong bo tshwanang (ka mokelikeli o tshwanang).
2. Kgatelelo e itshetlehile ka botebo bo otlolohileng, eseng sebaka se sekametseng kapa boemo bo otlolohileng.
3. Kgatelelo e kgolo haeba boima ba mokelikeli bo le boholo (mohlala, metsi a lewatle a na le kgatello e kgolo ho feta metsi a hlwekileng botebong bo tshwanang).
Mehato ea ho Bala Khatello ea Hydrostatic
Mokhoa o bonolo oa ho bala khatello ea hydrostatic ke ona:
1. Hlalosa mokelikeli o sebelisitsoeng
Fumana bongata ba 'mele (ρ). Mohlala:
– Metsi a hloekileng: hoo e ka bang 1000 kg/m³
– Metsi a leoatle: hoo e ka bang 1025 kg/m³
– Oli: e fapana, hangata e ka ba 800–900 kg/m³
– Mercury: hoo e ka bang 13.600 kg/m³
2. Fumana botebo ba ntlha (h)
Etsa bonnete ba hore diyuniti ke dimetara. Haeba botebo bo fanoe ka cm, bo fetole ho dimetara ka ho bo arola ka 100.
3. Fumana hore na ho potlaka ho bakoa ke matla a khoheli (g)
Sebelisa 9,8 m/s² kapa 10 m/s² ho latela litaelo tsa potso.
4. Kenya sebaka sa foromo P = ρgh
Bala 'me u netefatse hore yuniti ea sephetho ke Pascal (Pa).
5. Haeba o kopuoa kgatello e felletseng
Eketsa kgatello ya bokahodimo: P_total = P_surface + ρgh.
Mohlala oa Palo ea Khatello ea Hydrostatic
Mohlala oa 1: Khatello Tlase ho Letangoana la ho Hlapela
Letangoana la ho sesa le na le metsi a hloekileng a botebo ba limithara tse 2. Khatello ea hydrostatic e tlase ho letangoana ke efe? Sebelisa g = 10 m/s².
Hoa tsebahala:
– ρ = 1000 kg/m³
– g = 10 m/s²
– h = 2 m
Palo:
P = ρgh = 1000 × 10 × 2 = 20.000 Pa
Kahoo khatello ea hydrostatic e ka tlase ho letamo ke 20.000 Pa.
Mohlala oa 2: Khatello e Felletseng ka Khatello ea Sepakapaka
Ntlha e le 'ngoe e botebong ba limithara tse 3 metsing a hloekileng letamong le bulehileng. Bala khatello eohle haeba khatello ea sepakapaka e le 101.325 Pa, g = 9,8 m/s².
Hoa tsebahala:
– P_surface = 101.325 Pa
– ρ = 1000 kg/m³
– g = 9,8 m/s²
– h = 3 m
P_hydrostatic = 1000 × 9,8 × 3 = 29.400 Pa
P_kakaretso = 101.325 + 29.400 = 130.725 Pa
Kahoo kgatello yohle e ka ba 130.725 Pa.
Mohlala oa 3: Papiso ea Metsi le Oli
Ka tankeng ho na le oli e nang le boima ba 800 kg/m³. Bala khatello ea hydrostatic botebong ba 5 m haeba g = 10 m/s².
P = ρgh = 800 × 10 × 5 = 40.000 Pa
Kgatelelo ya hydrostatic botebong boo ke 40.000 Pa. Bapisa sena le metsi (ρ = 1000): P e tla ba 50.000 Pa. Sena se bontsha hore bongata bo ama kgatelelo.
Diyuniti tsa Kgatelelo le Diphetoho
Hangata kgatello e hlahiswa ka:
– Pascal (Pa) = N/m²
– kPa (kilopascals) = 1000 Pa
– bare = 100.000 Pa
– atm = 101.325 Pa
Mohlala, kgatello ya 20.000 Pa e ka ngolwa e le 20 kPa.
Tšebeliso ea Khatello ea Hydrostatic Bophelong ba Letsatsi le Letsatsi
1. Letamo
Mabota a matamo a etswa a teteaneng tlase hobane kgatello ya metsi e eketseha botebong bo boholo. Ena ke tshebediso e tobileng ya kgatello ya hydrostatic.
2. Litanka tsa Metsi le Litora
Litora tsa metsi li sebelisa molao-motheo oa hore khatello e angoa ke bophahamo ba kholomo ea metsi (h). Ha tora e le telele, khatello ea metsi e ka isoa malapeng e ba kholoanyane.
3. Likepe tse ka tlas'a metsi le ho qoela
Likepe tse tsamaeang ka tlas'a metsi li tlameha ho etsoa ka meaho e matla hobane khatello e eketseha haholo ha botebo bo ntse bo teba. Ka ho tšoanang, ba qoelang metsing ba sebelisa lisebelisoa tsa ho hema ka lebaka la khatello e phahameng.
4. Ho kenya le ho tšela mali
Metsi a kenngoang ka har'a methapo hangata a leketlisoa ho feta boemo ba 'mele oa mokuli, e le hore phapang ea bophahamo e hlahise khatello ea hydrostatic e thusang ho phalla ha mokelikeli.
Liphoso tse Tloaelehileng Ha ho Baloa Khatello ea Hydrostatic
Liphoso tse ling tse tloaelehileng:
– Ha e fetole diyuniti tsa botebo ho tloha ho cm ho ya ho m.
– Ho sebelisa boima (kg) вместо density (kg/m³).
– Ho nahana hore kgatello e itshetlehile ka bongata bohle ba metsi, ha se bohlokwa e le botebo.
– Ke lebetse ho eketsa khatello ea sepakapaka ha ke kopuoa khatello e felletseng.
Qetello
Ho bala khatello ea hydrostatic ho bonolo haholo: sebelisa foromo P = ρgh . Khatello e eketseha ka botebo, e susumetsoang ke ho teteana ha mokelikeli le ho potlaka ha matla a khoheli. Maemong a mang, khatello eohle e boetse e kenyelletsa khatello ea bokaholimo joalo ka khatello ea sepakapaka. Ka ho utloisisa mohopolo le mehato ea lipalo, u ka sebelisa khatello ea hydrostatic mathateng a fapaneng a fisiks le maemong a letsatsi le letsatsi, joalo ka moralo oa sebopeho sa metsi, litsamaiso tsa kabo ea metsi, esita le polokeho ea ho qoela.
Haeba o batla, nka etsa lipotso tse ling tsa ho itloaetsa ka lipuisano, kapa tafole ea bongata ba maro a fapaneng a atisang ho sebelisoa lipalo.
