5 Ngā Tauira o Ngā Pātai Whakawhiti Wera
1. E rua ngā tokotoko P me Q he rite te rahi engari he rerekē ngā momo konganuku e piri ana, e ai ki te pikitia i raro nei. Mena he rua te tauwehenga kawe wera o P i te tauwehenga kawe wera o Q, ko te pāmahana i te rohe o P me Q ko...
A. 600 oC
B. 200 o C
C. 100 o C
D. 90 o C
E. 60 o C
Kōrero
E mōhiotia ana:
E rua ngā tokotoko P me Q he rite te rahi
Ko te tauwehenga kawe wera P e rua te nui atu i te tauwehenga kawe wera Q
Ko te pāmahana o te pito o te tokotoko P he 90 ° , ko te pāmahana o te pito o te tokotoko Q he 0 ° , ā, ko te pāmahana i waenganui i ngā tokotoko P me Q he T.
Pātai: Te pāmahana i te papa rohe P me Q
Whakautu:
Ko te tātai mō te tere o te whakawhiti wera mā te arataki :
Whakaahuatanga: Q/t = te tere whakawhiti wera, k = te kawe wera, A = te horahanga whakawhiti-wāhanga, T 1 = te pāmahana teitei, T 2 = te pāmahana iti, l = te roa o te mea.
E rua ngā tokotoko P me Q he rite te rahi, nō reira ka ngaro te horahanga mata (A) me te roa (l) i te whārite. Ka huri te whārite i runga ake nei ki:
Ko te tauwehenga kawe wera P e rua te nui ake i te tauwehenga kawe wera Q. Ka huri te whārite i runga ake nei ki:
Ko te pāmahana o te pito o te tokotoko P he 90 ° , ko te pāmahana o te pito o te tokotoko Q he 0 ° , ā, ko te pāmahana i waenganui i ngā tokotoko P me Q he T. Ka huri te whārite i runga ake nei ki:
Ko te pāmahana i te papa rohe P me Q he 60 ° C.
Ko te whakautu tika ko E.
2. He rite te horahanga whakawhiti me te roa o ngā tokotoko A me te tokotoko B. Mena ko te tauwehenga kawe hiko o te tokotoko A = 1/4 te wā o te tauwehenga kawe hiko o te tokotoko B, ka whakamahanahia ngā mea e rua i tetahi pito, ā, ka kitea he rite tonu te huringa pāmahana o ngā mea e rua. Ko te ōwehenga o te tere whakawhiti wera o te tokotoko A me te tokotoko B ko…..
A. 1 : 4
B. 1 : 2
C. 1 : 1
D. 2 : 1
E. 4 : 1
Kōrero
E mōhiotia ana:
Te horahanga whakawhiti-wāhanga o te tokotoko A (A) = te horahanga whakawhiti-wāhanga o te tokotoko B (A)
Te roa o te tokotoko A (l) = te roa o te tokotoko B (l)
Tauwehenga ara iahiko o te tokotoko A (k) = 1/4 te wā o te tauwehenga ara iahiko o te tokotoko B (1/4 k)
Huringa o te pāmahana o te pae A (ΔT) = huringa o te pāmahana o te pae B (ΔT)
E hiahiatia ana: Te whakataurite i ngā tere whakawhiti wera o te tokotoko A me te tokotoko B
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 whakawhiti-wāhanga, T 2 = te pāmahana teitei, T 1 = te pāmahana iti, l = te roa o te mea.
He rite te horahanga whakawhiti-wāhanga, he rite te roa o te tokotoko, he rite te huringa pāmahana.
Ko te whakautu tika ko E.
3. E rua ngā tokotoko whakarewa A me B, he rite te rahi, ā, ko te tauwehenga kawe hiko he 2k me te k.
Kua honoa ngā pito e rua, ā, ka pāngia ngā pito kore utu e te pāmahana e whakaaturia ana i te pikitia.
Ko te pāmahana (T) i te hononga whakarewa A me B ko...
A. 80 ° C
B. 100 o C
C. 120 o C
D. 150 o C
E. 160 o C
Kōrero
E mōhiotia ana:
E rua ngā tokotoko whakarewa A me B he rite te rahi
Ko te tauwehenga ara iahiko o te konganuku A = 2k
Tauwehenga arataki whakarewa B = k
Te pāmahana o te pito whakarewa A = 210 ° C
Te pāmahana o te pito whakarewa B = 30 ° C
E hiahiatia ana: Te pāmahana (T) i ngā hononga whakarewa A me B
Whakautu:
Ko te tātai mō te tere o te whakawhiti wera mā te arataki :
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
E rua ngā tokotoko whakarewa A me B he rite te rahi, nō reira kua tangohia te horahanga mata (A) me te roa (l) o ngā tokotoko i te whārite.
Ko te whakautu tika ko D.
4. E rua ngā tokotoko arataki he rite te roa me te horahanga whakawhiti e honoa ana tetahi ki tetahi e whakaaturia ana i te pikitia i raro nei. Ko te tauwehenga arataki wera o te tokotoko arataki tuarua = 2 ngā wā o te tauwehenga arataki wera o te tokotoko tuatahi. Mena ka whakamahanahia te tokotoko tuatahi kia T 1 = 100 ° C me T 2 = 25 ° C, ko te pāmahana i te hononga (T) ko ...
A. 30 oC
B. 35 o C
C. 40 o C
D. 45 o C
E. 50 o C
Kōrero
E mōhiotia ana:
E rua ngā tokotoko whakarewa A me B he rite te rahi
Tauwehenga arataki o te tokotoko I = k
Tauwehenga arataki o te tokotoko II = 2k
Te pāmahana o te pito o te tokotoko I = 100 ° C
Te pāmahana o te pito o te tokotoko II = 25 ° C
I pātaihia: Te pāmahana i ngā hononga o ngā tokotoko I me II
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
Te pāmahana i te papa rohe P me Q:
E rua ngā tokotoko whakarewa A me B he rite te rahi, nō reira kua tangohia te horahanga mata (A) me te roa (l) o ngā tokotoko i te whārite.
Ko te whakautu tika ko C.
5. E toru ngā tokotoko whakarewa rerekē, A, B me C, engari he rite te roa me te horahanga whakawhiti, e honoa ana tetahi ki tetahi, e ai ki te pikitia i raro nei.
Te kawe hiko nui 4 kA = 2 manoB = kC me T1 = 100oC me T4 = 20oC kātahi ka te pāmahana T2 me T3 ko…
A. T 2 = 54,26 ° C, T 3 = 31,4 ° C
B. T 2 = 31,4 o C, T 3 = 54,26 o C
C. T 2 = 32,4 o C, T 3 = 54,26 o C
D. T 2 = 56,26 o C, T 3 = 31,4 o C
E. T 2 = 54,26 o C, T 3 = 30,4 o C
Kōrero
E mōhiotia ana:
T 1 = 100 ° C
T 4 = 20 ° C
4k A = 2k B = k C
Mena ko k C = 4, ko k B = 2, ko k A = 1
I pātaihia: T 2 me T 3
Whakautu:
Ko te tātai mō te whakawhiti wera mā te ara iahiko:
Ngā Mōhiohio:
Q/t = te tere whakawhiti wera, k = te kawe wera, A = te horahanga whakawhiti-wāhanga, T 1 = te pāmahana tīmatanga, T 2 = te pāmahana whakamutunga, l = te roa o te tokotoko.
He ōrite te roa (l) me te horahanga whakawhiti-wāhanga (A), nō reira kua tangohia atu rāua i te whārite.
Whakamahia tēnei whārite hei tatau i te pāmahana.
Whakaarohia ngā tokotoko whakarewa A me B.
Whakaarohia ngā tokotoko whakarewa B me C.
Whakakorea te whārite 1 me te whārite 2:
Tātaihia te T 2 mā te whakamahi i te whārite 1:
Ko te whakautu tika ko A.
Pūtake pātai:
Ngā Pātai Ahupūngao Whakamātautau ā-Motu mō te Kura Tuarua/Kura Tuarua Mahi-ā-ringa
