Pawg txhais tau tias tus nqi ntawm cov teeb meem hauv ib qho khoom. Matter yog ib yam uas tuaj yeem hnov lub cev. Feem ntau, huab hwm coj cuam tshuam nrog qhov loj ntawm qhov khoom, tab sis qhov no tsis tas li. Piv txwv li, lub zais pa tuaj yeem loj dua lwm yam khoom, tab sis muaj qhov hnyav tsawg. Muaj ntau txoj hauv kev uas koj tuaj yeem siv los xam qhov hnyav.
Kauj ruam
Ntu 1 ntawm 3: Txheeb Xyuas Pawg Los Ntawm Qhov Ceev thiab Ntim Ntawm Ib Lub Hom Phiaj
Kauj Ruam 1. Nrhiav qhov khoom ntom ntom
Kev nqus tshwj xeeb yog qhov qhia txog qhov ntom ntawm qhov teeb meem hauv ib qho khoom. Txhua cov ntaub ntawv muaj nws tus kheej qhov nqus tshwj xeeb uas tuaj yeem pom hauv internet lossis phau ntawv qhia. Chav tsev tshawb fawb rau lub ntiajteb txawj nqus tshwj xeeb yog kilogram ib cubic meter (kg/m3), tab sis koj tseem tuaj yeem siv grams ib cubic centimeter (g/cm3) rau cov khoom me me.
- Siv cov mis no los hloov cov chav nqus tshwj xeeb: 1,000 kg/m3 = 1g/cm3
- Ntawm qhov tod tes, qhov nqus tshwj xeeb ntawm cov kua feem ntau qhia hauv kilograms ib liter (kg/l) lossis grams ib milliliter (g/ml). Cov koog no sib npaug; 1 kg/l = 1 g/ml.
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Piv txwv:
pob zeb diamond muaj qhov tshwj xeeb ntawm 3.52 g/cm3.
Kauj Ruam 2. Xam qhov ntim ntawm qhov khoom
Volume yog tus nqi ntawm qhov chaw nyob ntawm ib yam khoom. Qhia qhov ntim ntawm cov khoom hauv cubic meters (m3) los yog cubic centimeters (cm3), thiab ntim cov kua hauv litres (l) lossis milliliters (ml). Cov mis ntim tau txiav txim siab los ntawm qhov zoo ntawm cov khoom. Nyeem kab lus no rau cov npe dav dav.
- Siv cov chav nyob ib yam li cov uas tau teev tseg hauv cov chav tshwj xeeb.
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Piv txwv li:
vim peb qhia qhov tshwj xeeb ntawm lub pob zeb diamond hauv chav ntawm g/cm3, peb yuav tsum qhia qhov ntim ntawm pob zeb diamond hauv cm3. Cia peb hais qhov ntim ntawm peb pob zeb diamond yog 5,000 cm3.
Kauj Ruam 3. Muab cov ntim thiab ntom ntawm cov khoom
Muab ob tus lej, thiab koj yuav tau txais qhov hnyav ntawm qhov khoom. Them sai sai rau cov ntsuas ntsuas thaum suav, thiab koj yuav tau txais cov chav ntawm qhov hnyav (kilograms lossis grams) hauv qhov kawg.
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Piv txwv li:
peb muaj pob zeb diamond nrog ntim txog 5,000 cm3 thiab lub ntiajteb txawj nqus tshwj xeeb 3.52 g/cm3. Txhawm rau nrhiav qhov hnyav ntawm pob zeb diamond, ua qhov kev suav ntawm 5,000 cm3 x 3.52g/cm3 = 17.600 Nws.
Ntu 2 ntawm 3: Xam Phaj Hauv Lwm Yam Teeb Meem Physics
Kauj Ruam 1. Txiav txim siab qhov hnyav nrog lub zog thiab nrawm
Newton txoj cai lij choj thib ob hais tias lub zog sib npaug rau lub sijhawm nrawm, lossis F = ma. Yog tias koj paub qhov tshwm sim quab yuam ntawm ib yam khoom thiab nws qhov nrawm, koj tuaj yeem hloov cov qauv no los suav qhov hnyav rau: m = F / a.
Kev quab yuam tau hais tawm hauv chav ntawm N (newtons), uas tuaj yeem sau tau (kg * m)/ s2. Kev nrawm tau hais tawm hauv chav ntawm m/s2. Thaum suav F/a, cov koog ntawm kev quab yuam thiab kev nrawm nrawm yog sib koom ua ke kom cov lus teb tau hais tawm hauv kilograms (kg).
Kauj Ruam 2. Nkag siab qhov sib txawv ntawm qhov hnyav thiab qhov hnyav
Pawg yog qhov teeb meem ntawm qhov khoom, uas yuav tsis hloov pauv tshwj tsis yog ib feem ntawm qhov khoom raug txiav lossis ntxiv. Qhov hnyav yog ntsuas ntawm qhov cuam tshuam ntawm lub zog nqus mus rau qhov hnyav ntawm ib yam khoom. Yog tias koj txav cov khoom mus rau qhov chaw uas muaj lub zog sib nqus sib txawv (piv txwv li, los ntawm lub ntiaj teb mus rau lub hli) nws qhov hnyav yuav hloov, tab sis nws qhov hnyav yuav tsis.
Txawm li cas los xij, ib yam khoom uas hnyav dua yuav hnyav dua li ib yam khoom uas tsis hnyav dua yog tias nws raug cuam tshuam los ntawm tib lub ntiajteb txawj nqus
Kauj Ruam 3. Xam cov molar hnyav
Thaum ua haujlwm ntawm kev ua haujlwm tshuaj lom neeg, koj tuaj yeem hla lub sijhawm "molar mass." Molar loj yog lub tswv yim txheeb ze, uas ntsuas tsis yog ib yam khoom, tab sis ib qho mole ntawm cov khoom sib xyaw. Nov yog yuav xam nws li cas hauv cov lus nug feem ntau:
- Rau ib lub ntsiab lus: nrhiav cov atomic loj ntawm lub hauv paus lossis cov khoom sib xyaw uas koj tab tom suav. Qhov no yog chav atomic pawg lossis amu. Sib npaug los ntawm qhov hnyav qhov hnyav tas li, 1 g/mol, yog li nws tuaj yeem hais tawm hauv cov txheej txheem hnyav molar g/mol.
- Rau qhov sib xyaw: ntxiv cov atomic pawg ntawm cov atoms ua cov sib xyaw kom tau tag nrho amu rau cov qauv. Muab tus lej no suav nrog 1 g/mol.
Ntu 3 ntawm 3: Ntsuas Pawg Nrog Tshuav
Kauj Ruam 1. Siv peb txhais caj npab sib npaug
Qhov nyiaj seem no tau siv dav los laij cov khoom hnyav. Qhov nyiaj seem no muaj peb caj npab nruab nrog tes taw hnyav li. Qhov hnyav ntawm caj npab tshuav tuaj yeem hloov pauv kom koj tuaj yeem ntsuas qhov hnyav ntawm qhov khoom.
- Qhov peb-caj npab sib npaug no tsis cuam tshuam los ntawm lub zog nqus, yog li nws tuaj yeem muab qhov ntsuas qhov tseeb ntawm qhov hnyav. Txoj kev nws ua haujlwm yog los ntawm kev sib piv qhov hnyav ntawm cov khoom paub nrog qhov hnyav ntawm cov khoom uas tab tom nrhiav.
- Qhov nruab nrab ntawm caj npab muaj qhov ntsuas ntawm 100 g, caj npab nraub qaum muaj qhov ntsuas ntawm 10 g, thiab caj npab pem hauv ntej tuaj yeem nyeem ntawm 0 txog 10 g. Qhov hnyav ntawm caj npab nyob ntawm ib kis.
- Koj tuaj yeem ntsuas qhov hnyav ntawm ib yam khoom kom raug siv qhov nyiaj seem no. Qhov ntsuas ntsuas yuam kev ntawm peb sab caj npab tsuas yog 0.06 g. Xav txog daim ntawv tshuav nyiaj no ua haujlwm zoo li lub saw saw.
Kauj Ruam 2. Xaub peb qhov hnyav nce mus rau sab laug ntawm caj npab
Xaub txhua yam thaum lub phaj seem tseem tsis muaj dab tsi, yog li tus lej uas nyeem yog xoom.
- Yog tias tus cim ntawm sab xis ntawm sab caj npab tsis sib thooj rau kab sib npaug, koj yuav tsum ntsuas qhov sib npaug los ntawm kev tig cov ntsia hlau rau sab laug sab laug ntawm daim phiaj sib npaug.
- Koj yuav tsum ua cov kauj ruam no kom ntseeg tau tias lub phaj khoob khoob hnyav 0.000 g kom nws tsis cuam tshuam rau kev nyeem cov txiaj ntsig tau. Qhov hnyav ntawm phaj sib npaug hu ua tare.
- Koj tseem tuaj yeem tig lub xov tooj hauv qab lub tais hauv lossis tawm kom txog thaum nws nyeem xoom. Muab qhov khoom coj los ntsuas rau ntawm daim phaj seem. Tam sim no, koj tau npaj los txiav txim qhov hnyav los ntawm zawv zawg qhov hnyav.
Kauj Ruam 3. Xaub qhov hnyav ib tus zuj zus
Ua ntej, xaub qhov hnyav ntawm 100 g caj npab rau sab xis. Txuas ntxiv mus kom txog thaum tus cim nyob hauv qab qhov sib npaug. Qhov ntsuas ntawm qhov sib npaug ntawm caj npab yog suav los ntawm sab laug qhia qhov hnyav ntawm cov khoom hauv chav nyob ntawm ntau pua grams. Los so ntawm ib kis mus rau lwm qhov.
- Xaub qhov hnyav ntawm 10 g caj npab rau sab xis. Khaws zawv zawg kom txog thaum tus cim nyob hauv qab qhov sib npaug. Qhov ntsuas ntawm qhov sib npaug ntawm caj npab yog suav los ntawm sab laug qhia qhov hnyav ntawm cov khoom hauv kaum tawm grams.
- Lub caj npab pem hauv ntej ntawm qhov nyiaj tshuav tsis yog cim nrog nplai. Koj tuaj yeem hloov qhov hnyav mus rau ib sab. Tus lej uas tau nyeem ntawm caj npab sawv cev rau qhov hnyav ntawm cov khoom hauv grams. Cov kab loj ntawm cov lej ntawm caj npab sawv cev kaum feem ntawm ib gram.
Kauj Ruam 4. Xam qhov hnyav ntawm qhov khoom
Tam sim no, koj tuaj yeem suav qhov hnyav ntawm cov khoom ntawm daim phaj tshuav. Koj tsuas yog xav tau ntxiv cov lej uas tau nyeem ntawm peb caj npab ntawm qhov nyiaj tshuav.
- Nyeem caj npab pem hauv ntej zoo li nyeem tus pas ntsuas. Koj tuaj yeem nyeem nws mus rau kab ib nrab.
- Piv txwv, cia peb hais tias koj ntsuas qhov hnyav ntawm ib lub peev ntawm dej qab zib. Yog tias caj npab nraub qaum nyeem 70 g, nruab nrab caj npab nyeem 300 g, thiab caj npab pem hauv ntej nyeem 3.34 g, qhov hnyav ntawm cov dej qab zib tuaj yeem yog 373.34 g.
Lub tswv yim
- Lub cim rau pawg yog m lossis M.
- Koj tuaj yeem siv lub laij lej online los xam qhov hnyav yog tias koj twb paub qhov ntim thiab qhov nqus tshwj xeeb.
