Ndine kapu, mutu wanga ndi waung'ono, kupotoza kutsegula ndi kumwa madzi pakamwa, thupi langa mafuta ndi zovala zokongola.Ndine wokongola kwambiri!Ndipo zovala Zanga ndi zopangidwachitsulo chosapanga dzimbiri.
Ndife zofunika pa moyo wamakono, pafupifupi aliyense ali nazo.Ndipo ife chifukwa cha mawonekedwe a kutentha kwa kutentha, timakondedwa kwambiri ndi anthu.Madzi otentha mu kapu wamba, pakapita nthawi kuchokera kotentha mpaka kuziziritsa, kutentha kwamtunduwu ndi lamulo lachilengedwe, koma kapu ya thermos imatha kupanga madzi mu kapu pakapita nthawi amatha kukhalabe ndi kutentha komweko. choyambirira, kotero anthu makamaka amakonda mtundu uwukapu ya thermos.
“Vuta kapu", anthu ambiri amatigwiritsa ntchito kumwa madzi tsiku lililonse.Koma kodi mukudziŵa chifukwa chake madzi otentha a m’kapu sazizira pambuyo pa maola angapo?Kodi mukudziwa zomwe mfundo yathu ikukhudzana ndi vacuum?
Mu 1892, katswiri wa sayansi ya zakuthambo wa ku Scotland James Dewar anapanga bukulivacuum cup.Ntchito yonse ya moyo wa Dewar makamaka inali yophunzira za cryogenics.Kuti aphunzire za kusungunuka kwa gasi, anafunikira chidebe chokhala ndi zotsekera bwino zamatenthedwe.Panthawiyo, kutentha kwa chidebecho sikunali bwino, ndipo kutentha kunali kosavuta kutaya.Choncho Dewar anaganiza za vacuum yomwe singathe kusuntha kutentha.Mzimu wake wofufuza zinthu ndi luso linapangitsa kuti zimene anatulukirazi zikhale zopambana.Chidebecho chinatchedwa "Dewar" ndipo kenako chinakhalavacuum cuptimagwiritsa ntchito tsopano.
Pofika m'zaka za m'ma 1950, malonda a makapu opanda kanthu adafika pachimake chifukwa cha zofuna za anthu.Nthawi imeneyi, makapu vacuum ankanyamulidwa mu picnic banja, maulendo nyanja ndi msasa kumunda.Kenako, zinthu zavacuum cupidasinthidwa mosalekeza,chitsulo chosapanga dzimbirindipo zitsulo zadothi zinakhala zida zazikulu za thanki yamkati ndi chipolopolo.Kuthekera kwakudzipatula kwa mpweya kumakulitsidwa, zomwe zimapangitsa kuti kapu yosungira kutentha kwa vacuum ikhale yabwinoko.
Nthawi yotumiza: Aug-05-2020