Isimiso somfutho wesimo somuntu kubantu

Kusukela ezikhathini zasendulo, abantu baye baqaphela ukuthi umoya, ngokuba yizinto "ezingenangqondo", usalokhu kuthinta isimo semithi ehlukahlukene. Ukugijima komcibisholo noma umcibisholo, ukuqhuma kwezinyoni, ukuhamba kwezinto ngesikhathi imimoya eqinile neziphepho zenza isithakazelo esingenakulinganiswa. Kodwa futhi kusukela esikhathini esidlule, mhlawumbe hhayi ukuqonda isimo salo mkhuba, abantu baye bafunda futhi basebenzisa ngokunenzuzo izinzuzo ezidala ingcindezi yomoya.

Ekuqaleni, ososayensi ababenesithakazelo kulokhu bakwenza ngendlela yokuthi umoya unesisindo, ngaphansi kwethonya lazo zonke izenzakalo zendawo ezenzekayo.

Kwakunzima kakhulu ukufakazela ubukhulu bomoya, kuthatha isikhathi eside kwaze kwaba yilapho ososayensi bekwazi ukuzama ukwenza lokhu iqiniso. Futhi leli cala laliyamukelekile icala. Phakathi nekhulu le-17, imfashini emithonjeni yayisakazeke emadolobheni aseYurophu. Babengumfanekiso wezimpahla nokuhlonipha kwedolobha, inqaba noma indawo. Eqondiswa yizicabango ezinjalo, isinqumo sokuhlomisa umthombo esigodlweni sakhe sathatha uMbusi waseTuscany, idolobha lase-Italy. Umklamo womthombo wawuhlanganisa ukuphuza amanzi emgodini owawukude nomthombo ngokwawo, kodwa lapho uqala khona amanzi awakwazi ukuphakama ngaphezu kwamamitha ayi-10. Into enjalo ayikwazanga ukuchaza ngokushesha ngisho neGalileo enkulu. Futhi umfundi wakhe kuphela - u-Torricelli - akazange akwazi ukufakazela ukuthi kukhona "isisindo" emoyeni, kodwa futhi wakwazi ukukala ukuthi ubukhulu bomshini ovamile womkhathi. Wakha ithuluzi elikhethekile lezilinganiso ezinjalo - i-barometer. Ngabe ngisebenzisa le divayisi, ngilinganisa ukuthi ingcindezi enkulu yomkhathi yilapho ingalinganiswa nomthamo othile wamanzi wamamitha angu-32. Kwabe sekutholwa ukuthi endaweni engamamitha ayi-1 ububanzi bomhlaba umoya uchotshozwa yisisindo sika-1.033 kg.

Lokhu kusebenza kuzo zonke izinto ezisemhlabeni, kuhlanganise nomzimba uqobo. Uma silinganisa indawo yayo, sithola inani elilinganiselwa ku-15,000 cm², okusho ukuthi umzimba uvezwe ngcindezi yomoya cishe ngo-15500 kg. Njengoba lokhu kucindezela kusakazeka yonke indawo ngokulinganayo, umuntu akajabuli ngalokhu "umthwalo".

Ukucindezelwa kwamanzi kuyalinganiswa ngezilinganiso ezinjenge-millimeters ze-mercury. I-unit of measurement ye-millibar (mb) nayo isetshenziselwa, kepha kamuva nje okujwayelekile ukusetshenziswa kukaPascal (noma i-hectoPascal, hPa), elilingana ne-millibar eyodwa. Uma uqhathanisa wonke amayunithi amathathu, khona-ke isilinganiso phakathi kwabo ngu: 760 mm Hg. = 1013 hPa = 1013.25 mbar. Zonke lezi zindinganiso zithathwa njengokujwayelekile komfutho womoya kumuntu. Umzimba womuntu uyakwazi ukulungisa kabusha, ukuvumelanisa nezinguquko ezingcindezini zomoya. Ngaphezu kwalokho, ikhono lokuziphatha ngokujwayelekile nezinye izingcindezi umuntu angazenza naye ngokuqeqesha.

Ngesikhathi esifanayo, kufanele kuqondwe ukuthi inqubo evamile yengcindezi yomkhathi kumuntu akusho ukuthi kuyoba yindabuko yezulu, ngoba ezindaweni eziningi zomhlaba kunezici eziningi ezithonya kakhulu lolu lwazi. Ngakho-ke, isibonelo, eVladivostok, ukucindezelwa kwesimo sezulu ngesilinganiso saminyaka yonke ngu-761 mm Hg, kanti lokhu kuyinto evamile yengcindezi yomkhathi kubantu. Ngesikhathi esifanayo, kwezinye izindawo eTibet, lapho ukuphakama kwemizi kungaphezu kwamamitha angu-5000, ingcindezi ingama 413 mm Hg kuphela. Leli xabiso, njengoba kulula ukulibala, lingaphansi izikhathi ezingu-1.8 kunomkhuba wokucindezela emkhathini womuntu.

Futhi iqiniso ukuthi ukuphakama kwengcindezi yasemkhathini kuxhomeke kakhulu ekuphakameni. Yingakho, ukuze kuvumelaniswe izinkomba zezinsimbi nemininingwane yezibalo, kuyisiko, uma ukucindezelwa kubonakala, ukukhombisa ukubaluleka kwayo ezingeni elithile-elwandle.