Yuav ua li cas muaj ntau yam kilometers ib mile: ib tug complex qhov teeb meem

Yuav ua li cas muaj ntau yam kilometers nyob rau hauv ib mais? Qhov no qhov teeb meem yog 250-300 xyoo dhau los yuav tau floored tsis tau tsuas yog ib txog tej traveler, tab sis kuj yog ib tug paub txog. Nyob rau ntawm ib mais? Thiab yog dab tsi ib tug kilometer?

Lo lus "mais" yog muab los ntawm cov Roman milia passum, ces muaj yog ib tug txhiab kauj ruam. Cov Loos xws li ib tug deb ntawm ib txhiab paces ob legionary. Qhov yuav tsum tau ntsuas qhov ntev, thiab tsis tsuas yog kim, tab sis kuj tus neeg cov khoom, yog yeej ib txwm nyob rau hauv tib neeg. Deb li cas thiab khi rau lub davhlau ntawm cov xub, thiab ib hnub twg txoj hau kev, thiab txawm mus rau hauv cov hlab - uas yog, kom txog thaum koj mus, haus luam yeeb ib yam naj npawb ntawm cov hlab.

Tshwj xeeb tshaj yog nrov npe ntev ntsuas txuam nrog rau lub npe ntawm lub cev qhov chaw. Qhov no, piv txwv li, lokot- 0.5 'meter' ncua - txog 20 cm, ft -. 30 cm kawg txhais los ntawm lus Askiv raws li "kauj ruam, tus ko taw". Nws yog ib cuab kev hais tias xws li ib tug system yog es tsis yooj yim. Tom qab tag nrho, nws ob txhais taw thiab txhais tes, thiab cov kauj ruam rau tag nrho cov neeg ntawm txawv lengths.

Los ntawm kawg ntawm lub puas tawm xyoo, ntau tshaj plaub caug txawv mais muaj nyob rau hauv cov teb chaws Europe ntsuas mus rau daim av. Lo lus teb rau lo lus nug hais txog yuav ua li cas muaj ntau yam kilometers ib mais, txawv nyias, txawm nyob rau hauv lub teb chaws nyob rau hauv lub zej zog.

Cov Roman mais, raws li ntau qhov chaw, cas 1483 los yog 1598 meters. Nyob rau hauv lub nyob sib ze hais thiab Scotland nyob txawv mais. English yog luv luv, nws suav 1609 meters, nyob rau hauv lub Scottish -. 1808 m ntawm loj ntev yog ib tug German mile - 7.420 meters. Zoo li yog qhov teeb meem no nyob rau hauv Russia. Ntawm no, raws li cov av ntsuas qhov ntev ntawm lub mais siv tsis tshua, feem ntau nws yog siv los daws tau qhov teeb meem ntawm lub metric. Lavxias teb sab mais muaj xya mais, thiab nws yog 7468 meters.

Tiam sis tag nrho cov ntaub ntawv ntev pelted mile Scandinavia. Swedish mais muaj ib tug ntev ntawm 10688 m thiab lub npe ntawm tus coos Norwegian yuav thov - nws yog 11298 m.

Lawm, xws li ib tug teeb meem no tsis nplua ntau. Thiab nyob rau hauv 1875 nyob rau hauv Paris XVII lub teb chaws kos npe rau 'meter' Convention uas tom qab koom los ntawm lwm lub xeev. Nyob rau hauv lub neej txhua hnub muaj xws li meters, kilometers, kilograms. Tam sim no cov zauv metric system qhia los ntawm tag nrho cov lub lag kev luam tsim lub teb chaws. Tam sim no, cov lus teb rau lo lus nug: "Yuav ua li cas muaj ntau yam kilometers nyob rau hauv 1 mile?" yooj yim npaum li, txawm lub fact tias ib tug mais tawm los ntawm kev siv. Yooj yim daws thiab cov rov qab qhov teeb meem. Piv txwv peb nyeem hais tias muab qhia khoom 1 mile. Yuav ua li cas muaj ntau yam kilometers tau striding traveler? Lub caij nyoog teb yog. Yuav ua li cas muaj ntau yam kilometers nyob rau hauv ib mais - tam sim no nws yog lub npe hu raws nraim. Av mile yog 1.608 km, thiab lub hiav txwv - 1.853 km.

Nrog rau tag nrho nm nws yog chiv ib tug me ntsis yooj yim. Tom qab tag nrho, lub hiav txwv yog tsis mus ntsuas qhov kev ncua deb kauj ruam. Sailors rau teb cov lus nug txog yuav ua li cas muaj ntau yam kilometers ib mais, yuav tsum tau cia siab rau astronomical suav. Nautical mile conditionally sib npaug zos rau ib feeb ntawm latitude, los yog 1853 meters, uas yog, yog hais tias tus lub nkoj sails raws caij nyoog nruab nrab ntawm ib tug nautical mais, nws qhov chaw nyob yuav hloov raws nraim ib feeb ntawm latitude.

Yeej muaj tseeb, muaj ib tug me me catch. Peb lub ntiaj teb - nws tsis yog raws nraim ib lub pob, nws yog flattened ntawm tug. Thiab nws hloov tawm hais tias nyob rau ncaj qhov kev ncua deb nkauj nraug ib feeb ntawm latitude nyob rau lwm yam, ib tug me ntsis ntau. Yog li ntawd, muaj yog lwm chav tsev ntawm kev ntsuas ntawm kev ncua deb - lub equatorial nautical mais. Nws yog 1855 meters.