Volume vs Density
ntim thiab ntom yog qhov tseem ceeb ntawm lub cev ntawm cov teeb meem. Lawv tau siv dav hauv chemistry thiab dej dynamics. Cov khoom loj tuaj yeem muab tau yog tias ob qho khoom no tau muab.
Volume
ntim ntsuas tus nqi ntawm peb qhov chaw nyob ntawm ib qho khoom. SI unit rau ntsuas ntim yog 'cubic meter'. Txawm li cas los xij, 'litre', uas yog sib npaug rau ib txhiab ntawm ib lub cubic meter (lossis cubic decimeter) yog qhov ntsuas nrov tshaj plaws rau ntim. ooj, pint thiab nkas loos yog cov units hauv imperial system rau ntim. Ib milliliter yuav muab ib tug cubic centimeter. Volume muaj qhov ntev ntawm L3 (length x length x length).
Tsis zoo li qhov loj, ntim hloov raws li cov xwm txheej sab nraud. Raws li ib qho piv txwv, qhov ntim ntawm ib qho qauv ntawm cov pa yog nyob ntawm qhov cua siab. Lub ntim ntawm cov khoom tuaj yeem hloov pauv thaum nws yaj.
Muaj cov lej lej los xam qhov ntim ntawm cov duab dav dav (ntev x qhov siab x dav rau lub cuboid, thiab 4/3 x πr 3rau ib tus kheej). Rau cov khoom uas muaj cov duab tsis yooj yim, ntsuas cov kua hloov pauv yog qhov kev xaiv zoo tshaj plaws.
Density
Density yog ib yam khoom ntawm lub cev, uas yog qhov ntsuas ntawm cov teeb meem muaj nyob rau hauv ib chav tsev ntim. Qhov ntom ntawm ib yam khoom tsis hloov nrog qhov loj ntawm tus qauv, thiab yog li, hu ua cov cuab yeej hnyav. Qhov ntom yog qhov sib piv ntawm qhov hnyav rau qhov ntim, thiab yog li ntawd, muaj lub cev qhov ntev ntawm ML -3ntsuas ntsuas qhov ceev yuav yog kilograms ib cubic meter (kgm -3) lossis grams ib milliliter (g / ml).
Thaum ib yam khoom tau muab tso rau hauv cov kua nws yuav ntab, yog tias cov khoom muaj qhov ntom ntom dua li cov kua. Qhov no yog vim li cas cov dej khov ntab saum dej. Yog tias ob lub kua dej (uas tsis sib xyaw ua ke) nrog qhov sib txawv ntawm qhov sib txawv tau muab tso ua ke, cov kua uas muaj qhov ntom ntom tsawg dua ntab rau ntawm cov kua nrog qhov ntom ntom dua.
Nyob hauv qee daim ntawv thov tshwj xeeb, qhov ceev yog txhais raws li qhov hnyav / ntim. Qhov no yog hu ua qhov hnyav, thiab qhov no, units yuav tsum yog Newtons ib cubic meter.
Qhov txawv ntawm ntim thiab ntom
1. Qhov ntim yog ntsuas hauv cubic meters, qhov ceev yog ntsuas hauv kilograms ib cubic meter.
2. Qhov ntom yog inversely proportional rau ntim yog tias qhov loj yog tas li. Qhov ntawd txhais tau hais tias qhov ceev yuav txo qis thaum lub ntim nce, thaum ua kom cov huab hwm coj mus tas li. Qhov no yog vim li cas qhov ntom ntawm ib yam khoom yuav txo qis thaum nws nthuav dav.
3. Qhov ceev yog cov khoom ntiag tug, whereas ntim yog cov cuab yeej dav dav.
4. Qhov ntom yog qhov loj suav los ntawm kev ua kom lub ntim tas li (uas yog ib chav tsev).
