E toru ngā momo whakawhiti wera , tae atu ki te whakawhiti wera mā te ara iahiko, te whakawhiti wera ā-whakawhiti, me te whakawhiti irahiko.
Te whakawhiti wera mā te kawe hiko. Ina pā atu tētahi mea pāmahana teitei ki tētahi mea pāmahana iti, ka neke te pūngao mai i te mea pāmahana teitei ki te mea pāmahana iti. Mā te pūngao tāpiri ka tere ake te neke o ngā ngota me ngā ngota e hanga ana i te mea. I a rātou e neke ana, ka whai pūngao nekeneke ngā ngota (EK = ½ mv 2 ). Ka tukinga ngā ngota tere ake (me te pūngao nekeneke nui ake) ki ngā ngota i tō rātou taha. Kātahi ka tukinga ēnei ngota ki ētahi atu ngota i tō rātou taha. Ā, pērā tonu. Nō reira ka tukinga ngā ngota tetahi ki tetahi, ka whakawhiti pūngao. Ko te whakawhiti wera e puta ana mā te tukinga i waenga i ngā ngota e hanga ana i tētahi mea ka kiia ko te kawe hiko. Ko te kawe hiko ka puta i roto i ngā mea totoka, mai i ngā mea totoka ki ngā wai (wai ki ngā mea totoka) mai i ngā mea totoka ki ngā hau rānei (hau ki ngā mea totoka).
Te whakawhiti wera mā te whakawhiti wera. Ko te whakawhiti wera ka puta i roto i ngā wai (hei tauira, te wai) me ngā hau (hei tauira, te hau). Ko te whakawhiti wera te whakawhiti wera me te nekehanga o tētahi mea nā te huringa o tōna mātotoru. Ka huri te mātotoru o tētahi mea nā te mea ka huri tōna rōrahi. Ka huri te rōrahi o tētahi mea nā te mea ka mimiti te mea i tētahi nui o te wera.
Te whakawhiti wera mā te irahiko. Ko te irahiko te whakawhiti wera i roto i te ahua o ngā ngaru hikohiko. Ko ētahi tauira o te irahiko ko te mahana e pā ana ki tō tinana ina tata koe ki te oumu me te irahiko mai i te rā ki te whenua. He teitei ake te pāmahana o te rā (tata ki te 6000 Kelvin), engari he iti iho te pāmahana o te whenua. Nā tēnei rerekētanga pāmahana i waenganui i te rā me te whenua ka neke te wera mai i te rā (he pāmahana teitei ake) ki te whenua (he pāmahana iti iho). Mena me whakamahi he reo hei whakawhiti i te irahiko mai i te rā ki te whenua, pērā i te kawe hiko me te whakawhiti hiko, e kore te wera e tae ki te whenua nā te mea me haere mā roto i te korehau.
Tauira raruraru
1. Ngā Pātai Whakamātautau ā-Motu mō te Ahupūngao SMA/MA 2015/2016 Nama 19
Ka honoa ngā tokotoko whakarewa he rite te rahi, engari he rerekē ngā konganuku, e ai ki te pikitia i raro nei. Mēnā he 4 ngā wā o te kawe wera o te konganuku I i te kawe wera o te konganuku II, ko te pāmahana i te hononga o ngā konganuku e rua ko…
A. 45oC
B. 40 o C
C. 35 ° C
D. 30 o C
E. 25 ° C
Kōrero
E mōhiotia ana:
Te kawe wera o te konganuku I = 4k
Te kawe wera o te konganuku II = k
Te pāmahana o te taha whakarewa I = 50 o C
Te pāmahana taha whakarewa II = 0 o C
I pātaihia: Te pāmahana i te hononga o ngā konganuku e rua
Whakautu:
Ko te tātai mō te tere o te whakawhiti wera mā te ara iahiko:
Whakaahuatanga: Q/t = te tere whakawhiti wera, k = te kawe wera, A = te horahanga o te mata, T 1 -T 2 = te huringa pāmahana, l = te roa o te tokotoko
He rite te rahi o ngā konganuku e rua, nō reira ka tangohia a A me l i te whārite.
Ko te whakautu tika ko B.
2. Ngā Pātai Whakamātautau ā-Motu mō te Ahupūngao SMA/MA 2015/2016 Nama 19
E whakaatu ana te pikitia e whai ake nei i ngā tokotoko whakarewa A me B o ngā momo rerekē kua honoa ki tētahi pito.
He rite tonu te horahanga whakawhiti-wāhanga o ngā tokotoko e rua, engari ko te roa o A he rua te roa o B, ā, ko te tauwehenga kawe wera o A he 3 ngā wā o B. Mena ka pāngia ngā pito kore utu o A me B e ngā pāmahana rerekē, ko te pāmahana tika i te hononga ko…
A. 60oC
B. 64 o C
C. 70 ° C
D. 76 o C
E. 78 ° C
Kōrero
E mōhiotia ana:
Te kawe wera o te tokotoko A = 3k
Te kawe wera o te tokotoko B = k
Te roa o te tokotoko A = 2l
Te roa o te tokotoko B = l
Te pāmahana o te taha o te tokotoko A = 100 ° C
Te pāmahana o te taha o te tokotoko B = 40 ° C
I pātaihia: Te pāmahana i te hononga o ngā tokotoko e rua
Whakautu:
Ko te tātai mō te tere o te whakawhiti wera mā te ara iahiko:
Whakaahuatanga: Q/t = te tere whakawhiti wera, k = te kawe wera, A = te horahanga o te mata, T 1 -T 2 = te huringa pāmahana, l = te roa o te tokotoko
He rite te horahanga whakawhiti o ngā tokotoko e rua, nō reira ka tangohia a A i te whārite.
Ko te whakautu tika ko D.
3. Ngā Pātai Whakamātautau ā-Motu mō te Ahupūngao SMA/MA 2014/2015 Nama 14
Kia tupato ki te kōrero e whai ake nei:
(1) te kawe hiko o te konganuku
(2) te rerekētanga pāmahana i waenga i ngā pito whakarewa
(3) te roa o te konganuku
(4) te papatipu whakarewa
Ko ngā āhuatanga e whakatau ana i te tere o te horapa o te wera i roto i te konganuku ko….
A. (1), (2), me (3)
B. (1) me (4)
C. (2) me (4)
D. (3) me (4)
E. (4) anake
Kōrero
Ko te whakawhiti wera i roto i te konganuku he whakawhiti wera mā te ara iahiko. Ko te tātai mō te tere o te whakawhiti wera mā te ara iahiko ko:
Whakaahuatanga: Q/t = te tere whakawhiti wera, k = te kawe wera, A = te horahanga o te mata, T 1 -T 2 = te huringa pāmahana, l = te roa o te tokotoko
Ko te whakautu tika ko A.
