Ukulinganisa Isikali Sokushisa Kusetshenziswa Amaphuzu Amabili Amiswe Ka-Celsius
Ngo-1742, u-Anders Celsius — isazi sezinkanyezi saseSweden eNyuvesi yase-Uppsala — wethula iphepha eRoyal Swedish Academy of Sciences ephakamisa isikali sokushisa esisekelwe emaphuzwini amabili okubhekisela angenziwa kabusha: iphuzu lokungqinisa nephuzu lokubila kwamanzi. Ukuqonda kwakhe okubalulekile kwakuwukuthi lezi zinguquko zesigaba zenzeka emazingeni okushisa angashintshi, anomhlaba wonke ngaphansi komfutho womoya ojwayelekile (760 mmHg / 101.325 kPa).
Isikali sokuqala sika-Celsius sasiphambene nalesi esisetshenziswa namuhla: wanikeza 0° ephuzwini lokubila kanye ne-100° ephuzwini lokungqinisa. Isikali saphendulwa ngemva kokufa kwakhe (1744), mhlawumbe ngu-Carl Linnaeus noma umakhi wamathuluzi u-Daniel Ekström.
Le nqubo idinga ubuchule obunakekelayo — imercury kumele ifinyelele ukubhalanseka okuphelele kuzo zonke izindawo zokubhekisela. U-Celsius wabhala ukuthi ushintsho lomfutho lwe-27 mmHg luhambisa iphuzu lokubila cishe nge-1°C.
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