Pūtaiao

3 Ngā tauira o te whakawhiti wera mā te whakawhiti wera

1. Whakamāramahia te tikanga mā te whakamahi i ngā tauira te whakawhiti wera mā te whakawhiti wera ?
Kōrero
Ko te whakawhiti wera whakawhiti he whakawhiti wera e haere tahi ana me te nekehanga o te matū. Hei tauira, whakaarohia te wai i roto i te ipu konumohe e whakamahanahia ana i runga i te oumu. I te tīmatanga, ka whakawhitihia te wera mā te kawe me te irahiko mai i te mura ki te ipu konumohe, kātahi mā te kawe mai i te ipu konumohe ki te wai.
Ka tīmata te whakawhiti wera whakawhiti ina whiwhi te wai e tata ana ki tētahi ipu konumohe i tētahi wera tāpiri, ka whakanui ake i tōna pāmahana, kātahi ka whānui. Ka whakaitihia e tēnei whānui tōna mātotoru, ka mānu te wai ki te mata. Ka whakakapia tēnei wai e te wai he iti ake te pāmahana, he nui ake te mātotoru. Ka haere tonu tēnei tukanga, ka hangaia he ia whakawhiti i roto i te ipu. Ka mutu te tukanga ina tae katoa te wai ki te mata. te pāmahana taua wā anō rānei e koropupū ana te wai.
Ko tētahi atu tauira ko te hau. Ko te hau he hau e neke ana. Ka neke te hau kia taea ai te neke i te wera mai i ngā wāhi he teitei te pāmahana ki ngā wāhi he iti te pāmahana.

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4 Ngā tauira pātai mō te wera huna, te wera hanumi, te wera o te kohu

1. Ko te nui o te wera me mimiti hei huri i te āhua o te 1 karamu koura mai i te totoka ki te wai ko….. Ko te wera rewa o te koura = 64,5 x 103 ^J /kg

Kōrero

E mōhiotia ana:

Taumaha o te koura (m) = 1 karamu = 1 x 10 ^-3 kg

Te wera o te hanumitanga o te koura (L _F ) = 64,5 x 103 ^J /kg

Pātai: Te wera (Q) e mimitia ana e te koura

Whakautu:

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9 ngā tauira o ngā pātai ahupūngao karihi mō ngā tauhohenga hanumi me te pūngao here ngota

1. Mātakihia te tauhohenga hanumi karihi e whai ake nei:
₁H² + ₁H³ → ₂He⁴ + ₀n¹ Ā,
Mena te papatipu ₁H² = 2,014 amu, papatipu ₁H³ = 3,016 amu, te papatipu o te matūriki α = 4,0026 amu me te papatipu o te niutron = 1,0084 amu, ko te pūngao i puta ko…. (1 amu he ōrite ki te 931 MeV)
A. 18,62 MeV
B. 17,69 MeV
C. 16,76 MeV
D. 15,73 MeV
E. 14,89 MeV
Kōrero

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4 ngā tauira o ngā pātai motuhake mō te wera me te kaha o te wera

1. Ko tēhea te mea ka tere ake te wera ina whakamaroketia ngātahi i te rā wera, i te konumohe, i te parahi rānei? Ko te wera motuhake o te konumohe = 900 J/kg ^o C, ā, ko te wera motuhake o te parahi = 390 J/kg ^o C.

Kōrero

Ka roa ake te wera o tētahi mea, ka nui ake te wera motuhake. I te taha ke, ka tere ake te wera o tētahi mea, ka iti ake te wera motuhake.

He iti ake te wera motuhake o te parahi i te wera motuhake o te konumohe, nō reira ka tere ake te wera o te parahi.

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5 Ngā tauira o ngā raruraru wera

1. Ko te wera motuhake o tētahi tine he 2 kirokaramu te taumaha, ko te 130 J.kg ^-1 C ^-1 . Ko te nui o te wera e mimitia ana e te tine hei whakapiki i tōna pāmahana mai i te 50 ^° C ki te 100 ^° C ko….

Kōrero

E mōhiotia ana:

Taumaha (m) = 2 kg

Te wera motuhake o te tine (c) = 130 J.kg ^-1 C ^-1

Huringa pāmahana (ΔT ) = 100 ^° C – 50 ^° C = 50 ^° C

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5 ngā tauira o ngā pātai whakawhanui rōrahi

1. He pōro totoka he mea hanga ki te konumohe, ā, ko te tauwehenga whānui rārangi he 24 x 10 ^-6° C ^-1 . Mena he 30 ^cm³ te rōrahi o te pōro i te pāmahana 30 ^° C , me whakamahana te pōro ki te pāmahana o….. ^° C kia piki ake ai te rōrahi o te pōro ki te 30,5 cm³^.

Kōrero

E mōhiotia ana:

Tauwehenga o te whakawhanuitanga rārangi (α ) = 24 x 10 ^{-6 o} C ^-1

Tauwehenga whānui rōrahi (γ ) = 3 a = 3 x 24 x 10 ^{-6 o} C ^-1 = 72 x 10 ^{-6 o} C ^-1

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3 Ngā tauira pātai mō te whakawhānui i te rohe

1. He 50 cm te roa o tētahi rau maitai i te pāmahana o te 20 ^{° C, ā, he 30 cm te whānui. Mēnā ko te tauwehenga whānui raina o te maitai he 10 -5 °} C ^-1 , ko te pikinga o te horahanga me te horahanga katoa i te pāmahana o te 60 ^° C ko….

Kōrero

E mōhiotia ana:

Te pāmahana tīmatanga (T ₁ ) = 20 ^° C

Te pāmahana whakamutunga (T ₂ ) = 60 ^° C

Huringa pāmahana (ΔT ) = 60 ^° C – 20 ^° C = 40 ^° C

Te horahanga tīmatanga (A ₁ ) = Te roa x te whānui = 50 henimita x 30 henimita = 1500 henimita ²

Ko te tauwehenga whānui rārangi o te maitai (α ) = 10 ^{-5 o} C ^-1

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6 Ngā Tauira o Ngā Pātai Tauira Atomika

1. Ko te rerekētanga i waenga i ngā tauira ngota e ai ki a Rutherford rāua ko Bohr ko…

Kōrero

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5 Ngā tauira pātai mō te whakawhanui i te roa

1. He pae rino i te pāmahana o te 20^oE 40 cm te roa o C. Ko te tauwehenga whānui raina o te maitai he 10^{-5 o}C^-1. Ko te pikinga o te roa o te maitai me te roa whakamutunga o te maitai i te pāmahana 70^oKo C te……
Kōrero
E mōhiotia ana:
Te pikinga o te pāmahana (ΔT) = 70^oC - 20^oC=50^oC
Te roa tīmatanga (L)₁) = 40 henemita
Tauwehenga o te whakawhanuitanga rārangi o te maitai (a) = 10^{-5 o}C^-1
I pātaihia: Te pikinga o te roa (ΔL) me te roa whakamutunga (L₂)
Whakautu:
a) Te pikinga o te roa (ΔL)
ΔL = αL₁ ΔT
ΔL = (10^{-5 o}C^-1)(40 henimita)(50^oC)
ΔL = (10^-5)(2 x 10³) henimita
ΔL = 2 x 10^-2 cm
ΔL = 2 / 10² cm
ΔL = 2 / 100 cm
ΔL = 0,02 henimita

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6 Ngā tauira o ngā pātai hurihanga pāmahana: te tauine Celsius, te tauine Fahrenheit, te tauine Kelvin

1. 50^oC = … ^oF?
Kōrero
I te pēhanga hau o te 1 āhuarangi, ko te pāmahana hukapapa mō te inemahana Celsius he 0.^oC, engari te whakamahana Ko te tauine Fahrenheit he 32^oF. I te pēhanga hau o te 1 āhuarangi, ko te pāmahana pūwāhi kohu mō te inemahana Celsius he 100^oC, ko te inemahana o te tauine Fahrenheit he 212^oF.
Nō reira, 0^oC=32^oF me te 100^oC=212^oF.

^{I te tauine Celsius, e 100 ngā nekehanga} i waenga i te 0 ^° C me te 100 ^° C . I te tauine Fahrenheit, e 180 ^{ngā nekehanga i waenga i te 32 °} F me te 212 ^° F . Hei whiwhi i te pāmahana Fahrenheit (T ^° F), whakareatia te pāmahana Celsius (T ^° C) ki te 9/5, kātahi ka tāpirihia te 32 ^°C.

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