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Zenziwa njani iifreyimu zeglasi yentsimbi?
Uyilo lweglasi Yonke isakhelo seglasi yamehlo kufuneka siyilwe phambi kokuba siye kwimveliso. Iiglasi azikho kakhulu imveliso yemveliso. Enyanisweni, zifana kakhulu nomsebenzi wezandla owenziwe ngumntu kwaye emva koko ziveliswe ngobuninzi. Oko ndisengumntwana, ndaziva ngathi ukufana kweeglasi ayisiyonto intle ...Funda ngokugqithisileyo -
Ngaba iifreyimu zeacetate zingcono kunezakhelo zeplastiki?
Yintoni i-cellulose acetate? I-cellulose acetate ibhekisela kwi-resin ye-thermoplastic efunyenwe nge-esterification kunye ne-acetic acid njenge-solvent kunye ne-acetic anhydride njenge-acetylating agent phantsi kwesenzo se-catalyst. organic acid esters. Isazinzulu uPaul Schützenberge waqala ukwenza le fayibha ngo-1865, ...Funda ngokugqithisileyo -
Kutheni unyanzelisa ukunxiba iindondo zelanga xa uphuma?
Gqoka izibuko zelanga xa uhamba, kungekhona nje ukubonakala, kodwa nempilo yamehlo. Namhlanje siza kuthetha ngeendondo zelanga. 01 Khusela amehlo akho elangeni Lusuku oluhle lohambo, kodwa awukwazi ukuwavula amehlo akho elangeni. Ngokukhetha iperi yezibuko zelanga, unga...Funda ngokugqithisileyo -
Iinzuzo zokunxiba iindondo.
I-1.Ukugqoka iiglasi kunokulungisa umbono wakho I-Myopia ibangelwa ukuba ukukhanya okude akukwazi ukugxila kwi-retina, okubangela ukuba izinto ezikude zingacaci. Nangona kunjalo, ngokugqoka i-lens ye-myopic, umfanekiso ocacileyo wento unokufumaneka, ngaloo ndlela ulungisa umbono. 2. Ukunxiba iindondo kuno...Funda ngokugqithisileyo -
Iiglasi zelanga ingqiqo eqhelekileyo
Iglasi yelanga luhlobo lwamanqaku okhathalelo lwempilo lwamehlo okuthintela uvuselelo olunamandla lokukhanya kwelanga ekubangeleni ingozi emehlweni abantu. Ngokuphuculwa kwezinto zabantu kunye nenqanaba lenkcubeko, iglasi yelanga ingasetyenziswa njengobuhle okanye ibonise ubucwebe obukhethekileyo besitayile somntu. Sungla...Funda ngokugqithisileyo