Video: Dab tsi yog arc thib ob?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A ob arc , arcsecond (arcsec), los yog arc ob yog 160 ntawm arcminute, 13600 ntawm ib degree, 11296000 ntawm ib tig, thiab π648000 (kwv yees 1206265) ntawm ib lub radian.
Hauv qhov no, 1 arc thib ob yog dab tsi?
Arc Ob . Ib chav ntsuas angular sib npaug 1 /60 ib arc feeb, lub 1 / 3600 ntawm ib degree. Cov arc ob yog npe. (tsis txhob tsis meej pem nrog lub cim rau ntiv tes).
Ib yam li ntawd, koj ua li cas nrhiav arc vib nas this? Angular Measurements Qhov kev ntsuas angular ntawm ib yam khoom feem ntau yog qhia hauv degrees, arcminutes lossis arcseconds . Ib yam li ib teev muab faib ua 60 feeb thiab ib feeb ua 60 vib nas this , degree muab faib ua 60 arcminutes thiab arcminute muab faib ua 60 arcseconds.
Tsis tas li ntawd, qhov kev ncua deb yog qhov arc thib ob?
Ntawm hiav txwv theem ib feeb ntawm arc raws txoj kab nruab nrab lossis ib qho meridian (qhov tseeb, ib lub voj voog loj) sib npaug ib mais ntawm thaj chaw raws lub ntiaj teb txoj kab nruab nrab lossis kwv yees li ib mais nautical (1,852 metres; 1.151 mais). A thib ob ntawm arc , ib tug rau caum ntawm cov nyiaj no, yog kwv yees li 30 meters (98 ko taw).
Muaj pes tsawg vib nas this ntawm arc nyob rau hauv 360 degrees?
Lub voj voog puv muaj 360 degrees . Ib degree tuaj yeem muab faib ua 60 feeb ntawm arc . Cov feeb ntawm arc yuav tsum tsis txhob totaub nrog feeb ntawm lub sijhawm. Txhua feeb ntawm arc muaj 60 vib nas this arc , yog a ob arc yog lub kaum sab xis uas yog 1/3, 600 ntawm a degree.
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