Cov txheej txheem:

Cov kev ntsuas scientific yog dab tsi?
Cov kev ntsuas scientific yog dab tsi?

Video: Cov kev ntsuas scientific yog dab tsi?

Video: Cov kev ntsuas scientific yog dab tsi?
Video: Hmong new song 2016 - Yog dab tsi - Xub Hluav Taws (Official MV) 2024, Kaum ib hlis
Anonim

Muaj xya lub hauv paus units hauv SI system:

  • kilogram (kg), rau qhov hnyav.
  • thib ob (s), rau lub sijhawm.
  • Kelvin (K), rau qhov kub thiab txias.
  • lub ampere (A), rau hluav taws xob tam sim no.
  • mole (mol), rau tus nqi ntawm cov khoom.
  • lub candela (cd), rau luminous siv.
  • lub ' meter ' (m), nyob deb.

Ib yam li ntawd, tib neeg nug, qhov ntsuas hauv kev tshawb fawb yog dab tsi?

Hauv kev kawm , a ntsuas yog ib phau ntawm cov ntaub ntawv ntau lossis cov lej uas piav qhia txog cov khoom ntawm ib qho khoom lossis qhov xwm txheej. A ntsuas yog tsim los ntawm kev sib piv ib qho kom muaj nuj nqis nrog cov qauv ntsuas. Kev kawm ntawm ntsuas hu ua metrology.

Ib sab saum toj no, qhov kev ncua deb ntsuas li cas hauv kev tshawb fawb? Astronomers siv metric units, thiab tshwj xeeb tshaj yog cov cgs (centimeter-gram-thib ob). Basic unit ntawm nyob deb yog centimeter (cm). Muaj 100 centimeters hauv ib lub 'meter' thiab 1000 meters hauv ib mais. lub parsec (pc), lub nyob deb ntawm qhov khoom muaj qhov hloov pauv parallactic ntawm 1 thib ob ntawm arc, lossis 3.1 × 1018cm.

Yog li ntawd, kev ntsuas kev tshawb fawb hauv chemistry yog dab tsi?

Kev ntsuas kev tshawb fawb ntawm Volume Volume, as ntsuas hauv chemistry , yog tus nqi ntawm qhov chaw teeb meem occupies. Nws yog feem ntau ntsuas los ntawm liter (L), 1.057 qt. Daim duab 4: Precise ntsuas ua kom cov tshuaj kom raug. Daim duab 5: Volumetric flasks ntsuas kua tshuaj kom raug.

Qhov twg hu ua ntsuas?

Kev ntsuas yog txoj haujlwm ntawm tus lej rau tus yam ntxwv ntawm ib qho khoom lossis kev tshwm sim, uas tuaj yeem muab piv nrog lwm yam khoom lossis xwm txheej. Scope thiab kev siv ntawm ntsuas yog nyob ntawm cov ntsiab lus thiab kev qhuab qhia. Kev tshawb fawb ntawm ntsuas yog nrhiav nyob rau hauv lub teb ntawm metrology.

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