Cov txheej txheem:

Yuav ua li cas koj pom qhov tsis paub meej ntawm ib qho cuab yeej?
Yuav ua li cas koj pom qhov tsis paub meej ntawm ib qho cuab yeej?

Video: Yuav ua li cas koj pom qhov tsis paub meej ntawm ib qho cuab yeej?

Video: Yuav ua li cas koj pom qhov tsis paub meej ntawm ib qho cuab yeej?
Video: Zaj Dub - Cas Tsis Xaiv Koj_Nkauj Tawm Tshiab [Official MV] 2024, Kaum ib hlis
Anonim

Rau xam tus qauv tsis paub meej , lub sijhawm ib nrab yuav muab faib los ntawm √3. Rau piv txwv , ib ntsuas nrog kev tshaj tawm kam rau siab lossis qhov tseeb ntawm ± 0.004mm yuav muaj tag nrho lub sijhawm ntawm 0.008mm thiab ib nrab ntawm 0.004. Tus qauv tsis paub meej 0.008mm / 2√3 lossis 0.004mm / √3, uas yog 0.0023mm.

Kuj nug, dab tsi yog qhov ntsuas qhov tsis paub tseeb?

Instrument Uncertainty . Thaum siv ib ntsuas los ntsuas qhov muaj nuj nqis, tus nqi kaw yuav ib txwm muaj qib ntawm tsis paub meej . Qhov no degree ntawm tsis paub meej yuav tsum muaj kev cuam tshuam thaum ib tus sau qhov ntau.

Ib yam li ntawd, qhov tsis paub meej ntawm tus qauv yog dab tsi? Standard Uncertainty thiab kwv tij Standard Uncertainty Lus txhais. Cov txheem tsis paub meej u(y) ntawm kev ntsuas qhov tshwm sim y yog qhov kwv yees txheem deviation ntawm y. Tus txheeb ze standard uncertainty ur(y) ntawm qhov ntsuas tau y yog txhais los ntawm ur(y) = u(y)/|y|, qhov twg y tsis sib npaug 0.

Ib yam li ntawd, koj ua li cas xam qhov tsis paub tseeb hauv chemistry?

Kev kwv yees tsis paub tseeb los ntawm cov txheej txheem rov ntsuas dua

  1. txhais =
  2. Luas = 24.0 cm 3
  3. range = (tus nqi loj tshaj - tus nqi tsawg tshaj plaws)
  4. = 25.0 - 23.0.
  5. luas = 2.0 cm 3
  6. uncertainty = ± ib nrab ntawm qhov ntau.
  7. = cm 3
  8. = ± 1.0 cm 3

Qhov feem pua tsis paub meej txhais li cas?

Nws yog xam as: The feem pua tsis paub meej tuaj yeem txhais raws li piav qhia tsis paub meej uas yuav tshwm sim yog hais tias tus nqi ntsuas tau 100 units. Ib qho zoo sib xws yog tus txheeb ze tsis paub meej (los yog fractional tsis paub meej ).

Pom zoo: