Video: Dab tsi yog txhais los ntawm kev nrawm thiab nrawm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv kev xaus, ceev thiab ceev yog cov kinematic ntau uas muaj cov ntsiab lus sib txawv. Ceev , yog ib qho scalar quantity, yog tus nqi ntawm qhov khoom npog qhov deb. Qhov nruab nrab ceev yog qhov kev ncua deb (scalar kom muaj nuj nqis) ib lub sij hawm piv. Ceev ceev yog tus nqi ntawm txoj haujlwm hloov.
Ua kom pom qhov no, qhov txawv ntawm qhov nrawm thiab nrawm hauv physics yog dab tsi?
Hauv paus ceev yog ib tug vector kom muaj nuj nqis thiab teev nyob rau hauv m/s (meters/second). Ceev yog qhov kev ncua deb mus los ntawm ib yam khoom uas yog, ceev yog qhov kev ncua deb mus los ntawm ib yam khoom ib lub sij hawm hauv a kev taw qhia tshwj xeeb. Ceev yog scalar ntau qhov twg as ceev yog vector kom muaj nuj nqis.
Ib yam li ntawd, cov mis rau qhov siab tshaj plaws yog dab tsi? Cov qauv rau ceev yog v(0)t. 19.8 * 15.9 = 314.82 m/s rau ceev tshaj plaws.
Kuj paub, yog dab tsi yog qhov ceev ceev formula?
Velocity Formula . Yog tias 'S' yog qhov hloov pauv ntawm ib qho khoom hauv qee lub sijhawm 'T', ces qhov ceev yog sib npaug, v = S/T. Cov units ntawm ceev yog m/s los yog km/hr.
Dab tsi yog hu ua velocity?
Ceev ceev yog ib qho vector qhia ntawm qhov kev hloov pauv uas ib yam khoom lossis cov khoom ua haujlwm raws sijhawm. Standard unit ntawm ceev magnitude (ib lub npe hu ua ceev) yog tus ' meter ' ib ob (m / s). Xav txog lub tsheb txav ntawm 20 m / s nrog rau qhov chaw ntawm txoj kev loj, taug kev mus rau sab qaum teb.
Pom zoo:
Dab tsi yog qhov zoo sib xws thiab qhov sib txawv ntawm qhov nrawm thiab nrawm?
Kev sib piv daim duab piv rau Kev Sib Piv Ceev Ceev Tus Nqi Hloov ntawm qhov kev ncua deb Hloov pauv hloov thaum lub cev rov qab mus rau nws qhov chaw pib Yuav tsis xoom Yuav yog xoom Tsiv khoom Ceev ntawm cov khoom txav tsis tuaj yeem tsis zoo. Kev nrawm ntawm cov khoom txav tuaj yeem yog qhov zoo, tsis zoo lossis xoom
Dab tsi yog qhov txawv ntawm qhov nrawm thiab nrawm nrog piv txwv?
Qhov laj thawj yog yooj yim. Kev nrawm yog lub sij hawm tus nqi ntawm qhov khoom txav mus raws txoj kev, thaum lub nrawm yog tus nqi thiab kev taw qhia ntawm qhov khoom txav. Piv txwv li, 50 km / h (31 mph) piav qhia txog qhov ceev ntawm lub tsheb uas taug kev raws txoj kev, thaum 50 km / teev sab hnub poob piav qhia txog qhov nrawm uas nws tab tom taug kev
Ib qho piv txwv zoo ntawm kev nrawm nrawm yog dab tsi?
Kev sib tsoo, photons, pib los ntawm kev so thiab dhia mus rau qee qhov nrawm yog txhua yam piv txwv ntawm cov khoom lossis cov xwm txheej uas qhov kev hloov pauv sai sai tshwm sim. Photons raug tso tawm ntawm qhov nrawm ntawm lub teeb ntsig txog qhov nruab nrab thiab lawv hloov nrawm thaum nkag mus rau lwm qhov nruab nrab
Dab tsi yog qhov txawv ntawm Arrhenius txhais thiab brønsted Lowry txhais ntawm acids thiab bases?
Qhov txawv ntawm peb txoj kev xav yog qhov kev xav Arrhenius hais tias cov kua qaub ib txwm muaj H + thiab cov hauv paus ib txwm muaj OH-. Thaum tus qauv Bronsted-Lowry thov tias cov kua qaub yog cov neeg pub dawb proton thiab cov neeg txais kev lees paub yog li cov hauv paus tsis tas yuav muaj OH- yog li cov kua qaub pub ib qho proton rau dej tsim H3O +
Dab tsi yog txhais los ntawm lub sij hawm dissociation thiab dab tsi yog ib qho piv txwv ntawm cov khoom uas dissociates?
Dissociation, nyob rau hauv chemistry, sib cais ntawm ib yam khoom mus rau hauv atoms los yog ions. Thermal dissociation tshwm sim ntawm qhov kub thiab txias. Piv txwv li, hydrogen molecules (H 2) dissociate rau hauv atoms (H) ntawm kub heev; ntawm 5,000 ° K txog 95% ntawm cov molecules hauv cov qauv ntawm hydrogen yog dissociated rau hauv atoms