Tus qauv ntawm lub sijhawm yog muab los ntawm [M0L0T 1 . Or, T=√[M0 L1 T0] × [M 0 L1 T-2- 1=√[T2]=[M0 L 0 T1]. Yog li ntawd, lub sij hawm yog dimensionally sawv cev li [M0 L0 T1].
Dab tsi yog qhov ntev ntawm lub sijhawm ntawm lub pendulum yooj yim?
Ib pawg m raug tshem tawm los ntawm cov xaim ntawm qhov ntev L yog lub pendulum yooj yim thiab ua rau muaj kev sib haum xeeb yooj yim rau amplitudes tsawg dua li ntawm 15º. Lub sij hawm ntawm lub pendulum yooj yim yog T=2π√Lg T=2 π L g, qhov L yog qhov ntev ntawm txoj hlua thiab g yog qhov nrawm vim lub ntiajteb txawj nqus.
Dab tsi yog lub sijhawm?
Sijhawm. Ib lub sijhawm ntev, lossis sijhawm ntev, yog qhov ntev ntawm lub sijhawm. Lub sij hawm feem ntau hu ua "plaub dimension" vim li no, tab sis qhov ntawd tsis yog txhais tau tias nws yog qhov loj me. Qhov ntev ntawm lub cev yog ib txoj hauv kev los ntsuas lub cev hloov pauv.
Dab tsi yog qhov loj me ntawm qhov ntom ntom?
Cov mis rau qhov ntom yog d=M/V, qhov twg d yog qhov ntom, M yog qhov loj, thiab V yog ntim. Qhov ceev yog feem ntau qhia nyob rau hauv units ntawm grams ib cubic centimeter. Piv txwv li, qhov ceev ntawm cov dej yog 1 gram ib cubic centimeter, thiab lub ntiaj teb qhov ceev yog 5.51 grams ib cubic centimeter.
yog dab tsiDimensional formula thiab dimensional equation?
Dimensional Formula yog kev qhia uas qhia tau hais tias yuav ua li cas thiab qhov twg ntawm lub hauv paus kom muaj nuj nqis sawv cev qhov ntev ntawm lub cev kom muaj nuj nqis. Dimensional Equation yog ib qho kev sib npaug tau los ntawm kev sib npaug ntawm lub cev nrog nws cov qauv loj.
