Amanzi abobona bumanzi buxhaphakileyo apha emhlabeni. Ubuninzi bamanzi bungama-71% emhlabeni. Amanzi angangxengwanga nganto akanavumba, akanancasa, engenawo nombala. Amadwala, iilwandle kunye nemilambo zezinwe ngamanzi. Imvula ngamanzi aza avela emafini esibhakabhaka. Ukuba ke amanzi aye abanda kakhulu, (abe kwiqondo elingaphantsi kwe-0), ayaqina abe ngumkhenkce. Imvula engamatye isenokuba ngumkhenkce okanye ibe liliqhwa xa iimeko zivuma. Ukuba ke amanzi aye ashushu kakhulu (mhlawumbi iqondo lobushushu bawo bubengaphezulu kwe-100), avele abile abe ngumophu ke ngoku. Abaluleke kakhulu amanzi ebomini. [2] Nangona kunjalo, kukho uphando oluthi kuya kuthi kubetha umnyaka ka-2025 bangaphezulu kwesiqingatha abantu abayakube benganamanzi ngokwaneleyo apha emhlabeni. [3]

Wayengumntu owayenqwenela ukuba ngugqirha esemncinci. Baza ke abazali bakhe boyiswa kukungabinazintsiba abakwazi ukumsa kwisikolo sokufundela ubugqurha, waza ke okaTutu wafunda kwikholeji i-Pretoria Bantu Normal watsho wangutitshala. Waafundisa kwisikolo semfundo ephakamileyo i""Johannesburg Bantu High"" nakwisikolo i""Munsienville High"" kwisixeko saseMogale.Wayeka ubutishala emva kwoku zizwa umtheto owaziwa njenge Bantu Education Act eqanqalazela imfundiso yabantu abamnyama base Mzantsi-Afrika. Waqhubeka ke kwizifundo zobufundisi ePeter's Theological College kwindawu yase Rosettenville, ngeyuoMnga (December) ka 1961 walawulwa ukuba ngumPriest kwiTshetshi elandela isikhokheli sakhe, uTrevor

Elinye igama lala manani kuthiwa angamanani a-positive. ngamanye amaxesha laa manani abhalwa njengo-+1 ukubonisa okokuba ahlukile kwamanye amanani waziwa ngokuba ngamanani a-negative numbers. Nangona kunjalo qaphela okokuba akusingawo onke amanani a-positive abanatural. Inani lisenokuba positive kodwa lingabikho natural (Umzekelo, i-

Ifonetiki (upelo /ifonetiki/, livela kwisiGrike: isandi, ilizwi) lisebe lofundo ngeelwimi eliquka ufundo ngezandi zentetho, okanye malunga nolwimi lokuthetha ngezandla isithetha- ntonye zizijekulo. Ibandakanya iimpawu zomzimba nezandi zentetho okanye iimpawu: ukuphinyiselwa kwazo, ukuvakala kwazo, ukuviwa ngeendlebe, nobume bazo ngokoluvo. Ifonoloji kwelinye icala, iqwalasela izinto ezingabonakaliyo, ukuhlengahlengiswa konxulumano lwegrama lwezandi neempawu.

Isifundo sefonetiki sisifundo esiyimimango ngemimango esigxile kwintetho. Malunga neelwimi ezithethwayo zintathu iindlela zokufunda ezingundoqo:

Xa kusongezwa i-complex number kwenye, ngamanye amazwi xa kudityaniswa ii-complex numbers ezimbini, dibanisa amacala e-real nawe-imaginary ecaleni. Umzekelo, (2 + 3i) + (3 + 2i) = (2 + 3) + (3 + 2)i= 5 + 5i.

Ifowuni sisixhobo esisebenza ngeentambo zombane. Ifowuni isebenza ngokuthi abantu ababini bekwiindawo ezahlukeneyo bakwazi ukuthetha. Iifowuni zamandulo bezisaya kuxhunyaniswa ngeengcingo zombane. Kungoku nje intetho eza ngefowuni ingathunyelwa ngeradiyo. Le ndlela intsha ke kuthiwa yiwayalesi okanye engenazintambo