Video: Yuav ua li cas koj xam lub sij hawm nyob rau hauv motion?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev daws rau sij hawm . Tus nqi ntawm kev hloov hauv txoj hauj lwm, los yog ceev, yog sib npaug rau qhov kev ncua deb uas tau muab faib los ntawm sij hawm . Tosolve rau sij hawm , faib qhov kev ncua deb mus los ntawm tus nqi. Piv txwv li, yog Cole tsav nws lub tsheb 45 km ib teev thiab taug kev atotal ntawm 225 km, ces nws mus rau 225/45 = 5hours.
Ib yam li ntawd, tib neeg nug, tus qauv rau lub sijhawm yog dab tsi?
Koj tuaj yeem siv qhov sib npaug qauv d = rt uas txhais tau hais tias nrug sib npaug lub sij hawm sij hawm . Yuav kom daws tau qhov ceev orrate siv lub qauv rau ceev, s = d / t uas txhais tau tias speedequals nrug muab faib los ntawm sij hawm . daws rau sij hawm siv cov formula rau lub sijhawm , t = d/s uas txhais tau tias sij hawm sib npaug nrug faib los ntawm kev ceev.
Tsis tas li ntawd, chav tsev rau kev ceev yog dab tsi? Chav tsev ntawm ceev suav nrog: meters ib ob (symbol m s−1 los yog m/s), lub SI muab tau chav tsev ; kilometers ib teev (cim km / h); mais ib teev (cim mi / h lossis mph);
Yog li ntawd, kuv yuav ua li cas xam qhov kev hloov chaw?
Rau xam kev hloov chaw thaum pib tshaj tawm, acceleration, thiab lub sij hawm qhov tseem ceeb tau teev tseg, siv cov mis S = ut + 1/2at². Hauv cov qauv no, U sawv cev rau qhov pib tshaj tawm, A yog qhov khoom nrawm, thiab T tuaj yeem sib npaug ntawm tag nrho lub sijhawm lossis tus nqi ntawm lub sijhawm uas cov khoom nrawm rau.
Tus qauv rau nruab nrab ceev yog dab tsi?
Nruab Nrab Ceev . Cov ceev ntawm ib qho khoom raug pom los ntawm kev faib qhov kev ncua deb uas cov khoom npog los ntawm lub sijhawm uas cov khoom siv los npog qhov kev ncua deb. Yog tias 'D' yog qhov kev ncua deb mus rau qee lub sijhawm 'T' ces tus ceev ntawm theobject rau txoj kev no los yog 's' yog sib npaug rau s = D / T.
Pom zoo:
Yog vim li cas magnesium nyob rau lub sij hawm 3 ntawm lub sij hawm?
Cov qauv ntawm cov khoom hloov pauv thaum koj mus hla lub sijhawm. Thawj peb yog hlau, silicon yog loj covalent, thiab tus so yog cov molecules yooj yim. Sodium, magnesium thiab aluminium tag nrho muaj cov qauv hlau. Nyob rau hauv magnesium, ob qho tib si ntawm nws sab nrauv electrons koom nrog, thiab nyob rau hauv txhuas tag nrho peb
Lub sij hawm twg yog californium nyob rau hauv lub sij hawm?
Cov khoom no yog ib qho khoom. Californium tau muab cais ua ib feem ntawm Actinide series raws li ib qho ntawm 'Rare Earth Elements' uas tuaj yeem nyob hauv Pawg 3 cov ntsiab lus ntawm Lub Sij Hawm Lub Sijhawm thiab hauv 6th thiab 7th lub sijhawm. Lub Ntiaj Teb Rare Elements yog ntawm Lanthanide thiab Actinide series
Yuav ua li cas koj xam lub sij hawm nws yuav siv sij hawm mus ncig teb chaws?
Kwv yees seb koj yuav mus sai npaum li cas ntawm koj qhov kev mus ncig. Tom qab ntawd, faib koj qhov kev ncua deb ntawm koj qhov nrawm. Qhov no yuav muab rau koj anestimation ntawm koj lub sijhawm mus ncig. Piv txwv li, yog tias koj mus ncig yog 240 mais thiab koj yuav tsav 40 mais ib teev, koj lub sijhawm yuav yog 240/40 = 6hours
Yuav ua li cas koj xam lub sij hawm nyob rau hauv lub oscilloscope?
Suav tus naj npawb ntawm kab rov tav faib los ntawm ib qho taw tes siab mus rau tom ntej (piv txwv li ncov mus rau ncov) ntawm koj lub teeb liab oscillating. Tom ntej no koj yuav muab tus naj npawb ntawm kab rov tav faib los ntawm lub sij hawm / faib kom pom lub teeb liab lub sij hawm. Koj tuaj yeem suav cov teeb liab zaus nrog qhov sib npaug no: zaus = 1 / lub sijhawm
Cov kab ntsug nyob rau hauv lub sij hawm lub sij hawm sawv cev li cas?
Cov kab ntsug ntawm lub sij hawm teev npe hu ua pab pawg lossis tsev neeg vim lawv cov tshuaj lom neeg zoo sib xws. Txhua tus tswv cuab ntawm tsev neeg ntawm cov ntsiab lus muaj tib tus lej ntawm valence electrons thiab cov khoom siv tshuaj zoo sib xws. Cov kab kab rov tav ntawm lub rooj ntu ntu yog hu ua lub sijhawm