Mene ne mita?

Zai ze cewa abin da zai iya zama sauki fiye da mataki naúrar, da abin da kowane mutum na fuskantar zahiri daga cikin shimfiɗar jariri,. Mita, kilogram, lita ... Duk da haka, wani lokacin rayuwar ɗura sabon tambayoyi kafin ma wadannan "gurus". Daya daga irin misalai - abin da yake wannan mita. Lalle ne, a cikin makaranta lissafi darussa a raka'a wani girma ba auna. Saboda haka, watakila ba su wanzu, kamar yadda aikata Gudun mita - tsarki almarar? Yanzu cewa Internet ne m ga dukan, a ka'idar, zaka iya samun amsar kusan duk wani tambaya. Babban abu - shi ne hakkin ya kirkiro shi. Na bincike da buga a cikin search bar na browser request "cewa mita ne" lalle ne haƙĩƙa mamakin cewa wadannan kalmomi suna a hade tare da kitchen theme. Menene wannan yake nufi?

misali

Zai yiwu, bayan duk, ya kamata sosai da bincike da tambaya daga abin da mita. Babu shakka, tun muna magana ne game da raka'a ji, da search for amsar da ya kamata a Faransa, a ofishin na kaya masu nauyi da kuma Matakan, wanda Stores duk reference samfurori SI. Amma idan za mu iya duba a tsaye, to, babu yanci mikakke mita akwai ba a samu. Wannan ya nuna cewa ba mita da ake bukata awo na tsawon ne kawai a kaikaice da alaka.

Da farko, wanda goma-rabo daga duration na nazarin sasannin meridians, intersecting Paris da aka dauka a matsayin tunani. Matakan da aka aiwatar a 1795, da kuma bayan gabatarwar daidaituwa tarawa a 1799, bisa ga data line aka yi da bakin platinum size. Daga bisani, duk da haka, žwarewar wannan mita suna ƙara kira a cikin tambaya, tun da siffar duniya ne da nisa daga wani cikakken Sphere, amma kuma a cikin gargajiya geodesy samu irin wannan unprecedented daidaito ba tare da tauraron dan adam awo ne kusan ba zai yiwu. Idan a lokacin da asali "misali" da daidaito da aka quite isa ga duk ayyuka na lokaci, da halin da ake ciki da aka canza a kowace shekara. A sakamakon haka, a shekarar 1960, an samarwa don amfani mai mita wani bangare na zango na atomic mika mulki a krypton. Kuma kawai shekaru 23 daga baya ya karbi Tutar su zamani fassarar, daura da tsawon hanyar da haske katako a wani wuri.

Mene ne mita?

Wannan lokaci da aka yi amfani da farko a sayar da birgima kayan. Godiya ga shi, ba su iya muhimmanci rage wuya da lissafin. Alal misali, mutum na bukatar saya 10 murabba'in mita linoleum. A kantuna aiki abu ne samunsa cikin Rolls, da nisa daga wanda yake invariable ga kowace ƙira. Saboda haka, kafin su sami ake bukata 10 sq. m zuwa 2 m fadi yi, shi ne zama dole don auna kawai 5 m. Tun 2 m * 5 m = 10 sq. M. nan ne 5 - da kuma samun mita. A wasu kalmomin, da mita ne daidai da tunani darajar, amma a ganin wani kara m darajar (a cikin wannan harka da nisa).

Duk da haka, wannan definition bukatar wasu bayani, a matsayin m magana "mikakke mita kitchen," shi ne, ba ko da yaushe ne bayyananne. Bayan duk, da misalin, da sayan kitchen furniture, a rubuce, za a iya tambaya to unwind daga yi wani yawan kabad. Rikice taso daga gaskiya cewa dillalai na irin furniture kayayyakin a baya aka ambata m dabi'u suna dauke ba m, da kuma kudin abu da kuma aiki. Idan muka sani farashin mai mita, da kuma kowane m bambanta kawai a cikin sarari sanyi (yayin da rike wannan adadin abu), zai iya zama da sauƙin amfani da manufar m lissafin da mita. Buyers sha'awar a cikin kudin na "a wannan kitchen model, amma a mafi girma ko karami tsawon," iya lissafta shi, ko da a kan nasu.