Ngiyinkomishi, ikhanda lami lincane, i-twist open iwukuphuza umlomo wamanzi, amafutha omzimba wami ngezingubo ezimibalabala.Ngimuhle kakhulu!Nezingubo Zami zenziweinsimbi engagqwali.
Siyizidingo zempilo yesimanje, cishe wonke umuntu unazo.Futhi thina ngenxa yezimpawu zokushisa ezishisayo, sithandwa kakhulu ngabantu.Amanzi abilayo enkomishini evamile, ngemva kwesikhathi esithile kusukela ekushiseni kuye kuphole, lolu hlobo lokuqhuba ukushisa luwumthetho wemvelo, kodwa inkomishi ye-thermos ingenza amanzi enkomishini ngemva kwesikhathi esithile isengakwazi ukugcina izinga lokushisa elifanayo njengelo. okwangempela, ngakho abantu ikakhulukazi bathanda lolu hloboindebe ye-thermos.
“Vacuum indebe“, abantu abaningi basisebenzisela ukuphuza amanzi nsuku zonke.Kodwa uyazi yini ukuthi kungani amanzi ashisayo enkomishini engapholi ngemva kwamahora ambalwa?Uyazi ukuthi isimiso sethu sihlobene kanjani ne-vacuum?
Ngo-1892, isazi sefiziksi nesazi samakhemikhali saseScotland uJames Dewar wasungula i-inkomishi vacuum.Umsebenzi kaDewar wokuphila konke wawugxile kakhulu ekutadisheni i-cryogenics.Ukuze afunde ngokuncibilika kwegesi, wayedinga isitsha esinokushisa okukahle.Ngaleso sikhathi, umphumela wokushisa oshisayo wesitsha wawungemuhle, futhi ukushisa kwakulula ukulahlekelwa.Ngakho uDewar wacabanga ngesikhala esingakwazi ukudlulisa ukushisa.Umoya wakhe wokuhlola nokusungula izinto ezintsha wenze ukusungula kwakhe kwaba impumelelo.Isitsha saqanjwa ngokuthi “Dewar” futhi kamuva saba yi-inkomishi vacuumsisebenzisa manje.
Ngawo-1950, ukuthengiswa kwezinkomishi ze-vacuum kwafinyelela inani eliphakeme ngenxa yesidingo sabantu.Ngalesi sikhathi, izinkomishi ze-vacuum zazithwalwa emapikinikini omndeni, uhambo lolwandle kanye nokukhempa emasimini.Kamuva, impahla yeinkomishi vacuumyathuthukiswa ngokuqhubekayo,insimbi engagqwalifuthi izitsha zobumba zaba izinto eziyinhloko zethangi langaphakathi negobolondo.Ikhono lokuhlukanisa umoya liyathuthukiswa, okwenza umphumela wokulondoloza ukushisa wenkomishi yokulondoloza ukushisa kwevacuum ube ngcono futhi ube ngcono.
Isikhathi sokuthumela: Aug-05-2020