6.1 Tau Txais Qhov Muaj. Derived quantities yog cov uas yuav qhia tau hais tias yog lub hauv paus los yog muab tau ntau npaum li caslos ntawm kev siv lej cim ntawm kev sib npaug thiab kev faib nkaus xwb (tsis suav ntxiv lossis rho lossis lwm yam kos npe).
Dab tsi yog muab tau kom muaj nuj nqis nrog piv txwv?
Drived quantities is the quantities which is expressed in terms of fundamental quantities thiab raws li xya lub hauv paus ntsiab lus. Piv txwv li, cheeb tsam, ntim, quab yuam, siab, ceev thiab lwm yam yog ob peb derived kom muaj nuj nqis.
Dab tsi yog muab tau ntau npaum li cas hauv chav kawm 7?
Dab tsi yog muab tau ntau? Teb: Lub cev muaj nuj nqis uas tuaj yeem tau txais los ntawm kev sib faib, faib lossis los ntawm kev ua lej sib txuas cov khoom siv tseem ceeb yog lub npe hu ua derived quantities.
Vim li cas thiaj hu ua kom muaj nuj nqis?
Cov khoom tau txais yog ntau uas xam los ntawm ob lossis ntau qhov kev ntsuas Lawv suav nrog thaj chaw, ntim, thiab qhov ntom. Lub cheeb tsam ntawm ib daim duab plaub yog xam raws li nws qhov ntev multiplied los ntawm nws qhov dav. Qhov ntim ntawm cov khoom sib npaug yog xam raws li cov khoom ntawm nws qhov ntev, dav, thiab qhov siab.
Qhov twg yog qhov muab tau los?
Ib chav tsev muab los yog SI chav ntsuas ntawm kev ntsuas suav nrog kev sib xyaw ntawm xya lub hauv paus. Zoo li SI unit of force yog lub derived unit, newton los yog N qhov twg N=s21 × m × kg.
