Video: Qhov twg hauv qab no yog chav tsev ntawm qhov hnyav?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
The SI units ntawm mass density yog kg / m3, tab sis muaj ob peb lwm yam units . Ib ntawm feem ntau siv units ntawm mass density yog gram per cubic centimeter, los yog g/cc. Qhov no yog vim dej ntshiab muaj ib tug huab hwm coj ceev ntawm 1 g/cc. Nws hloov tawm tias 1 ml ntawm kua yog sib npaug rau 1 cc ua volume.
Tsis tas li ntawd, ib qho ntawm cov hauv qab no yog qhov ntsuas qhov hnyav?
Qhov hnyav tshwj xeeb yog txhais raws li qhov hnyav ntawm ib chav tsev ntim. Qhov hnyav yog lub zog. SI unit rau qhov hnyav yog [N/m3]. Lub imperial unit yog [ lb /ft3].
Tsis tas li ntawd, dab tsi yog cov units rau qhov ntom ntawm cov kua? Qhov loj ntawm cov dej yog qhia nyob rau hauv grams (g) los yog kilograms ( kg ), thiab qhov ntim yog ntsuas hauv litres (L), cubic centimeters (cm3), los yog milliliters (mL). Qhov ceev yog xam los ntawm kev faib cov huab hwm coj los ntawm lub ntim, yog li ntawd qhov ceev yog ntsuas raws li units ntawm huab hwm coj / ntim, feem ntau g / mL.
Xav txog qhov no, qhov ntom ntawm cov khoom yog dab tsi?
Qhov ntom , qhov loj ntawm ib chav tsev ntim ntawm cov khoom yam khoom . Cov mis rau ceev yog d = M/V, qhov twg d yog ceev , M yog loj, thiab V yog ntim. Qhov ntom Feem ntau qhia nyob rau hauv units ntawm grams ib cubic centimeter. Qhov ntom kuj tseem tuaj yeem qhia tau tias yog kilograms ib cubic meter (hauv MKS lossis SI units).
Dab tsi yog qhov ceev thiab nws daim ntawv thov?
Qhov ntom yog qhov loj ntawm ib yam khoom rau ib chav tsev ntawm ntim. Nws yog siv los ntsuas qhov compactness ntawm ib yam khoom, thiab feem ntau qhia nyob rau hauv g / cm³, los yog lb / ft³. Cov ceev ntawm ib qho piv txwv yog qhia nrog Greek tsab ntawv "ρ" (Latin tsab ntawv D kuj siv tau) thiab xam raws li: ρ = m / v.
Pom zoo:
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