Me pēhea te ki te whakarite uara: taahiraa i tohutohu taahiraa. He aha ngā uara e taea te whakaritea: tauira

Mai i nga wa onamata, faaite iwi tino hiahia i roto i te pātai o te pehea te reira pai ki te whakarite i te uara i roto i ngā uara rerekē. A ehara i te mea tika pākiki tūturu. hoatu te tangata u'i whenua tahito reira he take uaua rawa pono uara mahi. Tika whanganga te whenua, te whakatau i te taimaha o te hua i runga i te mākete, e hiahia ana koe ki te tātai i te ōwehenga o taonga i roto i te hokohoko, ki te whakatau i te auau tika o nga karepe i roto i te hauhake o te waina - he tika te wahi iti o te mahi e maha papa i roto i te ora kua pakeke o to tatou tupuna enei. Na reira, ko te painga mātauranga me te iwi matau ki ki te whakarite, ki te tika, aru uara te tohutohu o ana hoa atu mātanga, a maha tango ratou i te utu e tika ana mo tenei mahi, a tino pai, i te ara.

He aha e taea te whakaritea

I roto i to tatou wa, kua homai ano hoki tenei mahi he tūranga nui i roto i te ako o te pūtaiao tangohia. Tangata katoa, o te akoranga, e matau ana tatou e ko te reira e tika ana ki te whakarite i te uara o ōrite, arā, aporo - aporo me beets - ki beets. Tangata, me te kore e tamata ki te whakapuaki degrees i roto i kiromita ranei manokaramu i roto i waeoro, engari nga kaka roa boa mohio tatou i te tamarikitanga (mo te hunga e kore e mahara, i roto i te kotahi boa - 38 kaka). Ahakoa kaka, rawa, he rerekē, a i roto i te meka ka rerekē te roa boa i runga i nga momo o te kākā rānei, engari he kōrero i roto i nei tamata tatou ki te matau enei.

dimensionality

A, no te i roto i te mahi: "Whakatauritea te uara" Me te hunga taua uara arahi ki te tauraro noa, faaite e te i roto i te taua uara mō te noho pai o te whakarite. Ko reira mārama e ki whakatairite i te uara, faaite i roto i kirokaramu ki whakahuatia he uara i roto i centners ranei i roto i taranata, mo tokomaha o tatou i roto i te puhera. Heoi, i reira he rahinga ōrite e taea te faaite i roto i ngā āhuatanga, me te, ano, i roto i ngā pūnaha ruri rerekē. Whakamātauria, hei tauira, whakarite i te uara o te pokey kinematic ka whakatau i te inu atu Kaore i roto i Cst me mita pūrua ia te rua. e kore e mahi i te reira? A e kore e whiwhi. Ki te mahi i tenei, whakaata uara e rua te taua uara, a kua runga i te uara tau ki te whakatau i a ratou, ko te pai ki te hoa tauwhainga.

pūnaha Tārewa

I roto i te tikanga ki te matau he aha ngā uara e taea te whakaritea, ngana ki te haamana'o i te pūnaha inenga ngā. I roto i te tikanga ki te arotau, me te whakatere i te tukanga whakataunga i roto i te 1875, whitu whenua (tae atu Russia, USA, Germany me ētahi atu.) Ua hainatia e te Kawenata Mita, a takoto pūnaha ngahuru. Hei whakawhanake me te whakatōpū paerewa o te mita me te whakaturia te manokaramu i te Komiti International mō Weights me Measures, me i Paris, ki te pīkau i te International Bureau o Weights me Measures. pae hopea tipu tenei pūnaha ki te Pūnaha International o Units, SI. I tēnei wā, i tēnei pūnaha kua whāngai e te nuinga o nga whenua i roto i te mara o te rorohiko hangarau, tae atu te hunga whenua te wahi e whakamahia ngā motu i roto i te ora ia rahinga tinana (pērā i te United States me Ingarangi).

GHS

Heoi, i roto i te whakarara ki te paerewa tohutoro tikanga ki te whakawhanake i ētahi atu, pūnaha CGS iti watea (henemita-karamu-rua). I anihia i roto i 1832 i te Tiamana ahupūngao Gauss, a i roto i 1874 whakahōungia Maxwell ko Thompson, te nuinga i roto i te mara o electrodynamics. I te 1889 ka whakaekea te reira pūnaha MKS atu watea (mita-kirokaramu-rua). Tauritenga nui rawa mita uara tohutoro me Engineers kirokaramu nui atu watea atu i te whakamahi o pārōnaki (centi-, haumano, fili et al.). Heoi, e kore kua kitea tenei ariā he whakautu nui i roto i te ngakau o te hunga hoki nei i te tikanga i te reira. I roto i te ao, kaha whakawhanakehia, ka whakamahia pūnaha ngahuru, na whakamana nga tātaitanga i te GHS iti me iti, me i muri i 1960, ki te whakataki o te pūnaha SI, GHS me e ngā hinga ki disuse. I tēnei wā GHS mau tono i roto i te mahi anake, ki te te tātaitanga i roto i rehe ariā me astrophysics, a ka tika ki te ohie ture puka tuhi o te autōhiko.

Hipanga i te aratohu taahiraa

E hi'opoa tatou i te hi'oraa i roto i te taipitopito. Tera pea te raruraru, ko: "Ka taea e koe te whakarite i te uara o te 25 taranata me 19570 kg ēnei te mea nui.?" Aha kia meatia e koe te mea tuatahi, ko te ki te whakatau i roto i te mea uara e tatou uara i homai. Na, ko te uara tuatahi kua hoatu matou i roto i tana, me te tuarua - i roto i kirokaramu. I roto i te taahiraa tuarua, tirohia tatou ahakoa kahore e tamata tatou ki te tomo i te compilers mahi huanane, e ngana ana ki te tiki ki te whakatairite i ngā uara Nä. He hoki mahi-mahanga, rawa i roto i te whakamātautau tere, te wahi i homai te whakahoki ki ia pātai e hoki 20-30 hēkona. Ka rite ki taea e matou te titiro, he ōrite te uara: i roto i kirokaramu me tana i whanganga e matou te papatipu me te tinana taimaha, na haere rua o te whakamātautau kei ki te hua pai. Te taahiraa tuatoru, te iriti manokaramu ki te ton, ranei, hei kōrero, he ton - i roto i kirokaramu mō te noho pai o te whakarite. I roto i te whakatinanatanga tuatahi tahuri 25 me 19,57 taranata, a tuarua: 25 000 me 19 570 kg. Na inaianei e taea e koe ki te rangimarie o te whakaaro ki te whakarite i te uara o enei uara. Ka rite ki mārama kitea, he nui atu i te tuarua (19 570 kg) te uara tuatahi (25 m) i roto i te wā e rua.

rore

Ka rite ki whakahuatia i runga ake, i roto i whakamātautau hou te rota o te mahi-kēhua. e kore te tenei tika parse to matou mahi, ka taea e te mahanga e rawa te kinokore-titiro pātai, rawa tetahi e taparu te whakahoki arorau. Heoi, ko te eia, rite ki te tikanga, kei roto i te kōrero, i roto i te mita iti e tamata i te drafters o te mahi i roto i nga ara, ki ke ranei. Hei tauira, hei utu o te maheni koe he raruraru whakawete ki te waihanga o te pātai: "Whakatauritea te uara wahi ko reira taea" - te drafters o te whakamātautau noa e taea ui koe ki te whakarite i enei uara, me te tīpako i te uara e strikingly rite ki tahi i te tahi ratou. Hei tauira, kg * m / s, me ² m / s ^2. I roto i te take tuatahi ko reira te kaha mahi i runga i te ahanoa (Newton te), me te tuarua - whakaterenga o te tinana, ranei m / s, me ² m / s te wahi e ui koe ki te whakarite i te whakaterenga o te tere o te tinana, e ko uara tino Nä.

whakarite matatini

Heoi, tino maha i roto i ngā mahi arahi e rua ngā uara, faaite kore anake i roto i te wae rerekē me ngā pūnaha rerekē o te tātai, engari rerekē hoki i ia atu i runga i nga pau o te tikanga tinana. Hei tauira, i roto i te tauākī raruraru reira ta: "Whakatauritea te uara o te pokey hihiri me te kinematic, me te whakatau i te inu atu Kaore." Ko te uara o te pokey kinematic e hoatu i roto i te waeine SI, e ko, i roto i te m ² / s, me hihiri - te GHS, e ko, i roto i te tū. Aha ki te mahi i roto i tenei take?

Hei whakaoti i enei raruraru, ka taea e koe te whakamahi i te tohutohu i runga ake ki te tāpiritanga iti te reira. whakatau tatou i o nga pūnaha ka mahi: kia waiho ai te pūnaha SI, he noa i roto i Engineers. Te taahiraa tuarua, tirohia hoki matou me kite ki te mea he mahanga? Otiia i roto i tenei tauira, rawa, he poke katoa. whakarite tatou i nga fluids e rua te tawhā o te waku ā-(pokey), Heoi e ōrite uara e rua. Ko te taahiraa tuatoru o te iritiraa i te pokey hihiri o te tū i roto i Pascal-rua, i te mea i roto i ngā waeine noa o te pūnaha SI. I tua atu iriti i te pokey kinematic i roto i te hihiri, whakanuia rawatia i te reira i te uara hāngai kiato wai (uara tepu) o, ka whakarite i te hua whiwhi.

i waho i te pūnaha

He hoki waeine ehara i te SI, wae arā kore whakaurua i SI, engari rite ki nga hua o te karanga i nga whakatau te amuiraa rahi i runga i Weights me Measures (GKVM), tika hoki te whakamahi ki te SI. Whakatauritea ēnei uara ki tahi i te tahi anake, no te mau mai i a ratou ki te paerewa SI toharite noa. Ki te waho te pūnaha ngā wae pērā i te meneti, te haora, te ra, rita, volts irahiko, kōpuku ha, pae, Āngatorōma, me te tini ke atu.