A meterstick yog ib qho cuab yeej rau ntsuas qhov deb.
Dab tsi yog siv los ntsuas qhov luv luv?
Digital tape ntsuas yog qhov tseeb rau ob qho tib si luv luv thiab ntev mus txog 300 ko taw. Lawv kuj yog portable thiab yooj yim siv.
Qhov ntsuas twg siv los ntsuas qhov deb?
An odometer yog cov cuab yeej siv tshuab ntsuas qhov deb.
ntsuas qhov deb yog dab tsi?
Kev deb yog dab tsi? Kev ntsuas nrug deb length. Piv txwv li, qhov kev ncua deb ntawm txoj kev yog ntev npaum li cas txoj kev. Nyob rau hauv lub metric system ntawm kev ntsuas, feem ntau cov chav nyob ntawm qhov deb yog millimeters, centimeters, meters, thiab kilometers.
Peb suav qhov nrug li cas?
Yuav daws kom deb li deb siv tus qauv rau distance d=st, lossis nrug sib npaug ntawm lub sijhawm nrawm. Tus nqi thiab kev ceev zoo sib xws vim tias lawv ob leeg sawv cev rau qee qhov kev ncua deb ntawm ib lub sijhawm xws li mais ib teev lossis mais ib teev. Yog tias tus nqi r yog tib yam li ceev s, r=s=d / t.
