Video: Dab tsi yog qhov ntom ntawm cov khoom?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov ntom , qhov loj ntawm ib chav tsev ntim ntawm cov khoom yam khoom . Cov mis rau ceev yog d = M/V, qhov twg yog ceev , M yog loj, thiab V yog ntim. Qhov ntom Feem ntau hais nyob rau hauv units ntawm grams ib cubic centimeter. Qhov ntom kuj tseem tuaj yeem qhia tau li kilograms ib cubic meter (hauv MKS lossis SI units).
Tib neeg kuj nug, dab tsi yog txhais los ntawm qhov ntom ntawm ib yam khoom?
Cov ceev , los yog ntau precisely, lub volumetricmass ceev, ntawm ib yam khoom yog nws qhov loj ntawm ib chav tsev ntim. Mathematically, ceev yog txhais raws li huab hwm coj faib byvolume: qhov twg ρ yog tus ceev , m yog qhov loj, thiab V yog qhov ntim.
Ib sab saum toj, dab tsi yog qhov ceev hauv cov lus yooj yim? Qhov ntom yog ib qho kev ntsuas uas sib piv cov nqi ntawm cov khoom uas muaj rau nws ntim. Ib yam khoom uas muaj ntau qhov teeb meem hauv qee qhov ntim muaj siab ceev . Qhov ntom yog pom los ntawm kev faib qhov loj ntawm ib yam khoom los ntawm nws qhov ntim.
Ib tug kuj yuav nug, qhov ceev pab txheeb xyuas cov khoom li cas?
Koj tuaj yeem txheeb xyuas ib tug tsis paub yam khoom bymeasuring nws ceev thiab muab koj cov txiaj ntsig sib piv rau cov npe uas paub ceev . Qhov ntom = loj / ntim. Koj kev txiav txim qhov loj ntawm cov hlau ntawm ib lub nplai.
Dab tsi yog qhov ntom ntom ntawm cov kua dej?
Qhov ntom [edit] Cov qhov ntom ntom ntawm cov kua dej , feem ntau yog xaiv los ntawm Greek lub cim (rho) txhais tau tias yog qhov loj ntawm lub kua dej dhau ib lub ntim infinitesimal. Qhov ntom isexpressed nyob rau hauv lub British Gravitational (BG) system asslugs/ft3, thiab hauv SI systemkg/m3.
Pom zoo:
Dab tsi yog qhov ntom ntom ntom ntom ntom ntom ntom?
Ib daim phiaj density yog ib qho piv txwv ntawm kev faib cov lej sib txawv. Nws yuav siv ib ntsiav ceev kwv yees los qhia qhov tshwm sim ceev muaj nuj nqi ntawm lub nce mus nce los (saib ntxiv). Nws yog ib tug smoothed version ntawm lub histogram thiab yog siv nyob rau hauv tib lub tswvyim
Dab tsi yog vim li cas ntawm qhov ntom ntom ntom?
Ntawm cov kua-cua sib cuam tshuam, qhov nro ntawm qhov chaw tshwm sim los ntawm kev nyiam ntawm cov kua molecules ntau dua rau ib leeg (vim kev sib koom ua ke) dua li cov molecules hauv huab cua (vim adhesion)
Dab tsi yog qhov txawv ntawm qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom nrog cov piv txwv?
Nws ua haujlwm nyob rau hauv ob qho tib si loj thiab me me thiab tsis yog raws li cov pej xeem ceev. Ceev dependent yam yog cov uas tswj cov kev loj hlob ntawm ib tug pej xeem nyob rau ntawm nws lub ceev thaum ceev ywj siab yam yog cov uas tswj pejxeem kev loj hlob yam tsis muaj nyob rau nws cov ceev
Vim li cas qhov ntom ntom yog ib qho khoom tseem ceeb ntawm cov dej hiav txwv?
Qhov ntom ntawm cov dej hiav txwv ua lub luag haujlwm tseem ceeb hauv kev ua kom dej hiav txwv dej ntws thiab cov cua sov ncig vim qhov tseeb tias cov dej ntom ntom ntws hauv qab qis dua. Salinity, kub thiab qhov tob tag nrho cuam tshuam qhov ntom ntawm cov dej hiav txwv. Qhov ceev yog ib qho kev ntsuas ntawm qhov nruj npaum li cas ntawm cov teeb meem tau ntim rau hauv ib lub ntim
Lub raj mis ntom ntom siv li cas los nrhiav qhov ntom ntawm cov kua?
Qhov loj thiab qhov loj ntawm cov molecules nyob rau hauv cov kua thiab ze npaum li cas lawv tau ntim ua ke txiav txim siab qhov ntom ntawm cov kua. Ib yam li cov khoom, qhov ntom ntawm cov kua sib npaug ntawm cov kua faib los ntawm nws qhov ntim; D = m/v. Qhov ceev ntawm cov dej yog 1 gram ib cubic centimeter