Korehau Taiepa Rua Te Pounamu Wai Waiata me te Kakau

He mea nui nga kapu Thermos i roto i te oranga o te tangata ia ra.He maha nga tangata e pai ana ki te inu i te wai wera, ka taea e te kapu takawai te pupuri i te pāmahana wai, no reira ka whakamahia e te katoa i te takurua.Na, he aha e noho mahana ai, kei te mohio koe ki te kaupapa kei muri?

Ka hangaia te kapu takawai mai i te pounamu takawai.He rite tonu te kaupapa o te tiaki wera ki tera o te pounamu takawai.Mo te pai o te kawe, ka mahia te pounamu hei kapu.I mua ake, ka whakamahia e te tangata nga ipu takawai hei penapena wai wera.Ka kiia hoki nga ipu Thermos he ipu thermos, he ipu wai kohua, he kohua wera ranei.Ka kati te waha ki te puru.

I te tau 1892 i hangaia e te tohunga ahupūngao Ingarangi a Sir James Dewar te ipu korehau hou.I taua wa, e mahi ana ia i tetahi mahi rangahau mo te whakakaha hau.Hei whakaheke hau i te pāmahana iti, me hanga e ia tetahi ipu hei wehe i te hau mai i te pāmahana o waho.No reira ka tono ia ki a Berg, he tohunga moata, kia pupuhihia he pounamu rua mona.E rua nga paparanga ipu karaihe, ko nga pakitara o roto o nga papa e rua ka pania ki te mercury, katahi ka ngotea te hau i waenganui i nga papa e rua kia puta he korehau.Ko tenei momo pounamu korehau e kiia ana ko "Du pounamu", ka taea te pupuri i te pāmahana o te wai i roto kia kore e rereke mo tetahi waa ahakoa he makariri, he wera ranei.

E toru nga huarahi mo te whakawhiti wera: te kawe wera, te wera wera me te whakamaarama wera.Ko te riki o te pounamu wai whakahiato he hanganga karaehe paparua-rua, a ka whakakorehia te waenganui ki te whakaiti i te whakawhitinga wera;ka aukatihia te riki karaihe ki te puru e kore e ngawari ki te whakahaere i te wera, ka taea te ringihia te wai wera ki te whakaheke i te wera wera;ka whakakikoruatia te raina i waenganui i te karaihe-rua-rua te karaihe Hiriwa, e whakaata ana i te hihi wera i roto i te pounamu ki muri.Kaua e whakahawea ki ia pounamu takawai iti, ka whakamahia e ia nga tikanga whakawhiti wera e toru hei whakatutuki i te pai o te tiaki wera.

Ko te ihu kapu takawai o mua ko te awhi o roto o te ipu wai takawai iti, engari mo te pai o te inu, ka tuwhera te waha o roto.Na te whakawhanaketanga o te hapori, kua iti noa te kite i tenei ahua o te kapu waiariki karaehe pakarukaru, he maha atu nga kapu takawai ka mahia ki te kowiri tira, engari he rite tonu te kaupapa o te tiaki wera.

Ko te pounamu wai wera kowiri tira he hanganga paparua-rua, a ko te tank o roto me te tinana o te kapu ka paiherea ki te hanga i te korehau, e kore e whakawhiti i te wera;he pai te mahi hiri o te tikaokao o te pounamu wai wera, a he iti noa te mate wera na roto i te convection.Ka whakakikoruatia te parahi, te hiriwa ranei i waenga i te tank o roto me nga papa e rua o te kowiri tira i runga i te tinana kapu, ka taea te whakaiti i te wera i ngaro i te radiation.He ngawari ki te kawe i nga ipu wai kowiri tira, he roa, he ngawari ki te horoi, kua noho pai ki te maakete.

Ko te tikanga, ko te mea kino rawa atu o te pounamu takawai ko te kaokao, no reira ka pai ake te whakamarumaru o te wera ki te kapu takawai he nui te kaha me te waha iti.I te wa e haere ana ma runga motoka, e mahi hakinakina ana ranei o waho, ka noho ko te kapu thermos kaha nui hei taputapu me mau.

Ka pupuri te thermos i te pāmahana ehara i te mahana, no reira ehara i te mea ka pupuri i te wai wera ki tetahi pāmahana, engari ka taea ano e ia te pupuri i nga mea penei i te sorbet ki tetahi pāmahana.Ko te hanga o te kapu takawai he uaua te wera o roto ki te memeha, a, ehara i te mea ngawari mo te wera o waho ki te kuhu ki roto, na reira ka noho "mahana" me te "matao" te kapu takawai.