Hauv lub neej txhua hnub, xws li hauv kev tsim khoom, qee zaum nws yuav tsum tau hloov qhov ntsuas ntawm cov kua dej mus rau hauv qhov hnyav. Dab tsi suav xav tau rau qhov no? Tej zaum muaj qee yam khoom siv los txhais lus rau qee qhov kev siv lub cev mus rau lwm tus?
Nws yog qhov tsim nyog
lub rooj ntawm qhov ntom ntawm cov tshuaj yeeb dej caw
Cov Lus Qhia
Kauj ruam 1
Muaj ib lub tswv yim hais tias qhov hnyav ntawm ib qho kua tshuaj, qhov ntim ntawm qhov uas yog sib npaug rau ib liter, sib xws rau ib kilo. Txawm li cas los xij, txhawm rau kuaj xyuas qhov kev ntseeg siab no, nws txaus txaus kom rov qab ib qho qauv yooj yim los ntawm chav kawm ntawm lub tsev kawm ntawv physics: m = p * V, qhov twg m yog qhov ntau ntawm cov khoom noj, p yog nws qhov ntom, V yog ntim. Cov qauv mis no qhia meej txog kev ncaj qha rau ntawm qhov hnyav ntawm ib qho khoom siv tsis yog ntawm nws qhov ntim, tab sis kuj nyob ntawm nws qhov ceev. Yog li, nws tsis tuaj yeem hloov qhov ntim ntawm ib yam khoom rau hauv qhov hnyav, ntau dua qhov sib txawv - liv mus rau hauv kilos, vim cov no yog cov sib txawv ntawm lub cev ntawm kev ntsuas. Tab sis nws yog ua tau kom pom seb qhov loj ntawm cov tshuaj sau ib qho ntau ntim.
Kauj ruam 2
Txhawm rau hloov cov mis nyuj rau kilo, nrhiav qhov nws ntom. Raws li ntau qhov chaw, qhov ntom ntawm cov mis nws txawv nyob ntawm cov ntsiab lus hauv nws cov dej muaj pes tsawg, muaj roj, qhuav mis nyuj skimmed nyob ntawm 1027 txog 1032 kg / m³.
Kauj ruam 3
Txhawm rau muab qhov nruab nrab ntom ntom, ntxiv ob qho tseem ceeb thiab faib cov txiaj ntsig ntawm ob. Qhov ntom nruab nrab ntawm cov mis yuav muab sib npaug nrog 1029, 5 kg / m³. Hloov ib liv ntawm cov mis rau hauv lub cubic meters (cov ntaub ntawv tab: 1 litre = 0, 001 m³).
Kauj ruam 4
Thaum koj hloov cov txiaj ntsig p = 1029.5 kg / m³ thiab V = 0, 001 m³ rau hauv cov qauv: m = p * V (m = 1029, 5 kg / m³ * 0, 001 m³), koj tau txais m = 1, 0295 kg …
Qhov no txhais tau tias ib liter tuav 1.0295 kg ntawm mis.
