4 Ngā tauira pātai hei whakatau i ngā wāhanga tere tīmatanga o te nekehanga parabolic
1. Ka whanahia te pōro i te koki 60o ki te mata o te mara. Mena ko te tere tīmatanga (vo) 10 m/s, tautuhia ngā wāhanga poutū me ngā wāhanga whakapae tere pōro wawe!
Kōrero
E mōhiotia ana:
Koki (θ) = 60o
Te tere tīmatanga (vo) = 10 m/s
I pātaihia: vox me te voy
Whakautu:
I roto i tētahi ara iahiko pērā i te parahi, kei reira ngā irahiko e neke noa ana, e kore e neke matapōkeretia i ngā tere teitei engari kāore e mawhiti atu i te konganuku. Ko ngā irahiko ka taea te neke noa ka kiia he irahiko kore utu. Ahakoa e neke noa ana ngā irahiko ki ngā taha katoa, kāore he rere kupenga o ngā irahiko i tētahi taha. Ka puta tēnei āhuatanga ina kāore he rerekētanga pūmanawa i waenga i ngā pito e rua o te waea parahi.
Ka rere noa te wai mai i ngā wāhi teitei ki ngā wāhi iti, pērā i te wai ua, te awa, te wai puna rānei. Heoi, kāore e taea e te wai te rere noa mai i ngā wāhi iti ki ngā wāhi teitei. Hei tauira, kāore e taea e te wai puna te rere mai i te puna ki te puna wai ko ia anake, me te hiahia ki te kaha tangata, ki te kaha miihini rānei. Ko te nui ake o te rerekētanga o te teitei i waenga i te puna me te puna wai, ko te nui ake o te kaha e hiahiatia ana.
I roto i te ahupūngao , he wai te wai. Ko te wai he matū ka taea te rere me te noho pūmau. 🙂 Ko tētahi atu tauira o te wai ko te toto.
He kaha motuhake tō te pūnga hiko. Mēnā kāore e wātea te kaha e hiahiatia ana, ka taea te hono i ngā pūnga hiko e rua, neke atu rānei, hei whakatutuki i te kaha e hiahiatia ana. Hei hono tika i ngā pūnga hiko, he mea nui te māramatanga hōhonu ki ngā ara iahiko pūnga hiko.
I mua i te ako i ngā ara iahiko pūnga, me mārama tuatahi ki ngā tohu. 
Ko ngā mea e whai ake nei. Ko ngā rārangi poutū e rua i roto i te tohu pūnga e tohu ana i ngā kaiārahi e rua i roto i te pūnga pereti-whakarara. I roto i te tohu pākahiko, ko te rārangi poutū roa e tohu ana i te pūmanawa teitei (+) ā, ko te rārangi poutū poto e tohu ana i te pūmanawa iti (-). Ko ngā rārangi whakapae i roto i ngā tohu pūnga me te pākahiko e tohu ana i ngā waea.
Rauemi rokiroki hiko i roto i ngā pūnga
E rua ngā pereti/pepa o ngā kaiārahi hiko e hangaia ana te pūnga hiko, ā, kei waenganui i ngā kaiārahi hiko e rua he matū whakapūmau hiko. I te tīmatanga, kāore ngā kaiārahi hiko e rua e utaina ana ki te hiko. Kia mahi ai te pūnga hiko, me utaina ia pereti/pepa o te kaiārahi hiko, ā, he rite tonu te nui o te utu hiko i runga i ia kaiārahi hiko engari he rerekē ngā momo. Hei tauira, ko te utu o tētahi kaiārahi hiko he Q = +10 Coulomb, kātahi ko te utu o tētahi atu kaiārahi hiko he Q = -10 Coulomb. Mā te noho mai o te utu hiko kotahi te rahi engari he rerekē ngā momo utu hiko i runga i ngā kaiārahi hiko e rua ka hangaia he papa hiko i waenganui i ngā pereti kaiārahi hiko e rua, ko te ahunga o te papa hiko mai i te utu pai ki te utu kino. Hei tāpiri, ka puta hoki he rerekētanga pūmanawa hiko i waenganui i ngā kaiārahi hiko e rua, ko te kaha hiko o te kaiārahi hiko he nui ake, ko te kaha hiko o te kaiārahi hiko he iti ake.
Ka taea e te pūnga hiko te mahi mēnā kāore ngā pereti/pepa arataki e rua e pā tetahi ki tetahi, kia kore ai te utu hiko e neke mai i tetahi arataki ki tetahi. Waihoki, kia kore ai te utu hiko e neke mai i te arataki ki te hau, me waiho te wāhi i waenganui i ngā arataki e rua hei korehau. I roto i te tuhinga mō ngā pūnga hiko pereti whakarara, kua kōrerohia te kaha o te pūnga hiko pereti whakarara , i reira ka wehea ngā pereti e rua e te korehau. He herenga tō te kaha o te pūnga hiko i roto i te korehau, nō reira hei whakanui ake i te kaha, ka whakatakotoria he dielectric i waenganui i ngā pereti/pepa arataki e rua.
Ko te pūnga pereti whakarara he pūnga kei roto ko ngā pereti whakarara e rua, ko ngā pereti arataki rānei, he rite te horahanga whakawhiti (A) o ia pereti, ā, ko ngā pereti e rua e wehea ana e tētahi tawhiti (d), pērā i te pikitia i te taha maui. I roto i tēnei tuhinga, me kī ko ngā pereti arataki e rua e wehea ana e te korehau. I roto i te pikitia, ko tētahi o ngā pereti arataki he utu pai (+Q) ko tētahi atu pereti arataki he utu kino (-Q), ā, he rite tonu te nui o te utu hiko i runga i ia pereti.
Ka taea e te karāhe iti te pupuri i te iti o te wai, engari ka taea e te karāhe nui te pupuri i te nui ake. Ko te nui o te karāhe, ko te nui ake o te wai ka taea te pupuri. Nō reira, he kaha, he ine rānei mō te kaha pupuri wai o ia karāhe. Pērā i ngā karāhe, he kaha anō hoki ngā pūnga ki te penapena i te utu hiko me te pūngao pūmanawa hiko. Ko te kaha o te pūnga, ko te ine rānei i tōna kaha ki te penapena i te utu hiko me te pūngao pūmanawa hiko, ka kiia ko te capacitance.
He taputapu te pūnga hiko e penapena ana i te utu hiko me te pūngao pūmanawa . Ko te pūnga hiko māmā he mea hanga mai i ngā pereti kawe hiko e rua, i ngā rau rānei e whakanohoia tata ana tetahi ki tetahi engari kāore e pā, e wehea ana e te ārai hiko, e te korehau rānei. Ko te kawe hiko he rauemi e taea ai te kawe i te iahiko hiko, pērā i te konganuku, ko te ārai hiko he rauemi kāore e taea te kawe i te iahiko hiko, pērā i te kirihou.
Ko te pūmanawa hiko e tautuhia ana ko te pūngao pūmanawa mō ia waeine o te utu hiko . Hei tauira, ina i te pūwāhi a, ko te pūngao pūmanawa o te utu q he EP a , kātahi ka hangaia te pūmanawa i te pūwāhi a penei:
Whakaahuatanga: V = pūmanawa hiko, EP = pūngao pūmanawa hiko, q = utu hiko.
Kāore a V i te pūwāhi a anake engari kei ngā pūwāhi katoa o te mara hiko . Hei tauira, ka whakamahia te pūwāhi a. Ka whakamāramahia i muri mai, kāore tōna uara e whakawhirinaki ana ki te utu q.