Ngā Whatunga Gurumuda
Ngā whariki whakarara – ngā raruraru me ngā otinga
1. Ka whakamāramahia he whatanga kei roto he 4000 ngā kohao mō ia henimita , ā, ka puta te rārangi kanapa tuarua i te koki 30°. He aha te roanga ngaru o te mārama i whakamahia? (1 Å = 10 -10 m)
Mōhiotia:
Ko te tawhiti i waenga i ngā āputa (d) = 1 / (4000 āputa / cm) = 0.00025 cm = 2.5 x 10 -4 cm = 2.5 x 10 -6 mita
Raupapa (n) = 2
Sin 30 o = 0.5
1 Å = 10 -10 m
2 Te kaupapa mahi-pūngao Te kaha kore-pūmau Te nekehanga i runga i te papa whakarara me te waku – Ngā Raru me ngā Otinga
1. Ka paheke tetahi poraka i raro i te papa whakarara me te waku. He aha te tere o te poraka ina pa te poraka ki te whenua? Ko te tauwehenga waku nekeneke ko 0.4. Ko te whakaterenga nā te kaha ā-papatipu ko 10 m/s 2.
Mōhiotia:
Teitei tīmatanga (ho) = 6 mita
Teitei whakamutunga ( t ) = 0 m
Tere tīmatanga (v o ) = 0 (poraka i te tīmatanga i te okiokinga)
Tauwehenga o te waku nekeneke (μ k ) = 0.4
Ngā mahi i mahia i roto i ngā tukanga thermodynamic – ngā raruraru me ngā otinga
1. Ka pēhia he hau tino pai mai i te āhua 1 ki te āhua 2 e whakaaturia ana i te kauwhata i raro nei. Tātaihia te mahi i mahia e te hau.
otinga
1 rita = 0.001 m3
Mōhiotia:
Pēhanga 1 (P1 ) = 10 kPa = 10,000 Pa = 10,000 N/ m2
Pēhanga 2 (P 2 ) = 20 kPa = 20,000 Pa = 20,000 N/m 2
Te tukinga me te tiaki i te pūngao miihini – ngā whakamātautau me ngā otinga
1. He ōrite te taumaha o ngā mea e rua , m1 = m2 = 0.5 kg i taka mai i te teitei ōrite e whakaaturia ana i te pikitia i raro nei. Ko te radius o te porowhita he 1/5 m. He tino pūmau te tukinga i waenga i ngā mea e rua. Tātaihia te tere o ia mea i muri i te tukinga. Ko te whakaterenga nā te kaha ā-papatipu he 10 m/ s2.
Mōhiotia:
Papatipu o te mea (m) = m1 = m2 = 0.5 kirokaramu
Teitei tīmatanga (h1 ) = 1/5 m
Teitei whakamutunga (h 2 ) = 0 ( turanga o te ara )
Te nekehanga o te nekehanga me te nekehanga o te pere – Ngā raruraru me ngā otinga
1. Ka whakaurua he pōro 0.2-kg ki roto i te kōhao C, e whakaaturia ana i te pikitia i raro nei. Ka whiua e te kaiwhiu te pōro i roto i te 0.01 hēkona, ā, ko te ara o BC i haere i roto i te 1 hēkona. Tātaihia te rahi o te kaha kia taea ai te whakauru i te pōro ki roto i te kōhao C. Ko te whakaterenga nā te kaha ā-papa he 10 m/ s².
Mōhiotia:
Koki (θ) = 60 o
Taumaha o te pōro (m) = 0.2 kg
Te whakaterenga nā te kaha ā-papa (g) = 10 m/s 2
Wā wā (Δt) = 0.01 hēkona
Te nekehanga rārangi kore-taurite – ngā raruraru me ngā otinga
1.
E whakaatu ana te ripanga i runga ake nei i ngā raraunga mō ngā mea e toru e haere ana i te tawhiti ōrite me te whakaterenga pumau.
He aha te tere whakamutunga o te mea P me te tere tīmatanga o te mea Q?
Te ariā kinetic o ngā hau me te ture tuatahi o te thermodynamics – ngā raruraru me ngā otinga
1. Kei roto i tētahi ipu he 4 rita te rōrahi o ngā hau pai, ā, ko tōna pēhanga he 3 atm (1 atm = 10 5 Nm -2 ). Ka whakamahanahia ngā hau pai i te pēhanga pumau mai i te 27 ° C ki te 87 ° C. Ko te kaha wera o te hau he 9 JK -1 . He aha te rōrahi whakamutunga o ngā hau me te huringa o te pūngao ā-roto o ngā hau?
otinga
Tukanga isobaric (pēhanga pumau)
Mōhiotia:
Ko te rōrahi tīmatanga o te hau (V 1 ) = 4 rita
Te hurihanga o ngā tinana mārō – ngā raruraru me ngā otinga
Te wā o te kaha
1. E toru ngā kaha e pā ana ki tētahi kurupae e 6 mita te roa, e whakaaturia ana i te pikitia i raro nei. He aha te taipana kupenga e huri ana i te kurupae huri noa i te pūwāhi O hei tuaka hurihanga?
Mōhiotia:
Te tuaka hurihuri i te pūwāhi O.
Kaha 1 (F 1 ) = F
Ko te tawhiti i waenganui i te rārangi mahi a F 1 me te tuaka hurihuri (r 1 ) = 3 mita
Ngā puna raupapa me ngā puna whakarara – ngā raruraru me ngā otinga
1. E piri ana tētahi mea 160-karamu ki tētahi pito o tētahi puna, ā, ko te huringa o te roa o te puna he 4 cm. He aha te huringa o te roa o ngā puna e toru e honoa ana i roto i te raupapa me te whakarara , e ai ki te pikitia i raro nei?
Mōhiotia:
Te panonitanga o te roa o te puna (Δx) = 4 cm = 0.04 m
Taumaha (m) = 160 karamu = 0.16 kg
Te whakaterenga nā te kaha ā-papa (g) = 10 m/s 2
Ngā nekehanga hurihuri – ngā raruraru me ngā otinga
1. Ko te taumaha o tētahi pūreirei he 2-kg te roa, ko tōna tere o te kore e nekeneke, ko I = 2/5 MR2 . Mēnā ko te tere o te kaha i runga i te pūreirei he 4 Nm, he aha te whakaterenga rārangi o te pūreirei? Ko te whakaterenga nā te kaha ā-papatipu ko g = 10 ms -2.
Kua mohiotia :
Ko te wā o te korekore o te pūrakau (I) = 2/5 MR 2
Te taumaha o te pūrakau (M) = 2 kg
Te kaha o te kaha (τ) = 4 Nm