Chav tsev ntawm qhov ntev yog chav tsev yooj yim siv los ntawm tib neeg los ntsuas qhov ntev ntawm cov khoom hauv qhov chaw. Ntau lub teb chaws muaj qhov sib txawv ntawm qhov ntev. Muaj ntau hom kev hloov pauv qhov ntev hauv lub ntiaj teb, suav nrog cov tsoos suav ntev units, thoob ntiaj teb tus qauv ntev units, imperial length units, astronomical length units, thiab lwm yam. Nyob rau hauv peb lub neej txhua hnub, kev kawm, thiab kev lag luam ntau lawm thiab kev ua haujlwm, kev hloov pauv ntawm ntev units yog inseparable. Hauv qab no yog cov npe ntawm cov qauv hloov pauv ntawm cov chav sib txawv, vam tias yuav pab tau koj zoo dua.
Hauv International System of Units, tus qauv ntawm qhov ntev yog "meter", sawv cev los ntawm lub cim "m". Qhov ntev units yog tag nrho cov metric.
Cov mis hloov pauv ntawm cov qauv thoob ntiaj teb ntev units yog raws li hauv qab no:
1 kilometer/km = 1000 m/m = 10000 decimeter/dm = 100000 cm/cm = 1000000 hli/mm
1 millimeter/mm = 1000 micron/μm = 1000000 nanometer/nm
Ib txwm suav cov chav nyob ntev xws li mais, ko taw, taw, thiab lwm yam. Cov mis hloov dua siab tshiab yog raws li hauv qab no:
1 mi = 150 feet = 500 m.
2 mais = 1 km (1000 meters)
1 = 10 feet,
Luas = 3.33 m
1 luas = 3.33 decimeter
Ob peb lub tebchaws nyob sab Europe thiab Asmeskas, feem ntau yog tebchaws United Kingdom thiab Tebchaws Meskas, siv imperial units, yog li cov chav nyob ntev lawv siv kuj txawv, feem ntau yog mais, yards, feet, thiab inches. Cov mis hloov pauv rau imperial ntev units yog raws li nram no: mais ( mais) 1 mais = 1760 yards = 5280 feet = 1.609344 kilometers Yard (yard, yd) 1 yard = 3 feet = 0.9144 meters Fathom (f, fat, Fa, ftm) 1 luas = 2 yards = 1.8288 m Wave (furlong) 1 nthwv dej = 220 yards = 201.17 meters Feet (ko taw, ft, lub plural yog taw) 1 ko taw = 12 ntiv tes = 30.48 centimeters Hauv nti (nti, hauv) 1 nti = 2.54 centimeters
Nyob rau hauv astronomy, "lub teeb-xyoo" feem ntau yog siv los ua chav tsev ntawm qhov ntev. Nws yog qhov kev ncua deb ntawm lub teeb nyob rau hauv lub nqus tsev vacuum nyob rau hauv ib xyoos, yog li nws kuj hu ua lub teeb-xyoo.
Cov mis hloov pauv rau astronomical ntev units yog raws li nram no:
1 lub teeb xyoo = 9.4653 × 10^12 km
1 parsec = 3.2616 lub teeb xyoo
1 astronomical unit≈149.6 lab kilometers
Lwm qhov ntev xws li: meter (Pm), megameter (Mm), kilometer (km), decimeter (dm), centimeter (cm), millimeter (mm), silk meter (dmm), Centimeters (cmm), micrometers (μm) , nanometers (nm), picometers (pm), femtometers (fm), ammeters (am), thiab lwm yam.
Lawv hloov dua siab tshiab kev sib raug zoo nrog meters yog raws li nram no:
Luas = 1 x 10 x 15 m
Luas = 1 x 10 x 9 m
Luas = 1 x 10 x 6 m
Luas = 1 x 10 x 3 m
Luas = 1 x 10^(-1) m
Luas = 1 x 10^(-2) m
Luas = 1 x 10^(-3) m
Luas = 1 x 10^(-4) m
Luas = 1 x 10^(-5) m
Luas = 1 x 10^(-6) m
Luas = 1 x 10^(-9) m
Luas = 1 x 10^(-12) m
Luas = 1 x 10^(-15) m
Luas = 1 x 10^(-18) m
Post lub sij hawm: Mar-22-2024