Video: Dab tsi ua rau muaj kev hloov pauv hauv linear momentum?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txoj cai lij choj tuaj yeem qhia tau li no: Hauv kev sib tsoo, ib qho khoom muaj kev quab yuam rau lub sijhawm tshwj xeeb uas ua rau muaj kev sib tsoo. hloov hauv lub zog . Qhov tshwm sim ntawm qhov quab yuam ua rau lub sijhawm muab yog tias qhov khoom loj yog nrawm los yog qeeb (los yog kev hloov kev taw qhia).
Tom qab ntawd, ob lub ntsiab lus twg ua rau muaj kev hloov pauv hauv lub zog?
Kev taw qhia ntawm lub lub zog vector yuav zoo ib yam li cov nrawm . Muab Momentum ” nyob rau hauv Conceptual ntsiab lus: Ob yam cuam tshuam lub zog yog qhov loj thiab nrawm ntawm qhov khoom. Ib yam khoom uas muaj qhov qis nrawm thiab ib pawg me me tsim tawm tsawg kawg lub zog vim nws yuav siv lub zog me me thiab/los yog lub sijhawm los nres nws.
Tom qab ntawd, lo lus nug yog, dab tsi yog ob txoj hauv kev uas koj tuaj yeem ua kom muaj zog linear? Raws li linear zog = velocity x mass (non-relativistically), ces muaj xwb ob txoj kev rau nce qhov (magnitude) ntawm lub lub zog . Nce qhov (magnitude) ntawm qhov nrawm los yog nce pawg. Nco ntsoov tias qhov nrawm, zoo li yog lub zog , yog li lawv muaj qhov loj thiab kev taw qhia.
Ntawm no, koj yuav daws li cas rau kev hloov pauv hauv lub zog?
Yog tias lub zog ua, piv txwv li, rau 5 vib nas this: 50 × 5 = 250. Qhov no yog qhov khoom. hloov hauv qhov nrawm, ntsuas hauv m / s. Multiply cov khoom hloov luas = 250 x 20 = 5,000. hloov hauv lub zog , ntsuas hauv kg m/s.
linear momentum txhais li cas?
Linear zog txhais tau tias yog cov khoom ntawm ib qhov system qhov loj multiplied los ntawm nws cov tshaj tawm. Yog li qhov loj dua ib yam khoom loj lossis qhov loj dua nws qhov nrawm, qhov loj dua nws lub zog . Momentum p yog a vector muaj tib qhov kev taw qhia raws li kev tshaj tawm v. Lub SI unit rau lub zog yog kg·m/s.
Pom zoo:
Dab tsi yog qhov txawv ntawm ib puag ncig kev hloov pauv thiab kev hloov pauv qub txeeg qub teg?
Qhov sib txawv ntawm cov yam ntxwv ntawm cov tib neeg ntawm tib hom yog hu ua variation. Qhov no yog inherited variation. Qee qhov kev hloov pauv yog qhov tshwm sim ntawm qhov sib txawv ntawm ib puag ncig, lossis ib tus neeg ua dab tsi. Qhov no yog hu ua environmental variation
Dab tsi yog kev saib xyuas ntawm kev ruaj ntseg sab hauv txawm tias muaj kev hloov pauv hauv ib puag ncig sab nraud?
Kev saib xyuas ntawm kev ruaj ntseg sab hauv txawm tias muaj kev hloov pauv hauv ib puag ncig sab nraud yog hu ua homeostasis
Dab tsi tsim cov roj siab thiab nws hloov pauv li cas nrog kev hloov pauv hauv kinetic zog?
Gas siab yog tshwm sim los ntawm kev sib tsoo ntawm cov khoom siv roj nrog rau sab hauv ntawm lub thawv thaum lawv sib tsoo nrog thiab tawm dag zog rau ntawm phab ntsa ntim. Tom qab ntawd cov roj yog cua sov. Raws li qhov kub ntawm cov roj nce, cov khoom tau nce lub zog kinetic thiab lawv cov nrawm nrawm
Thaum ib qho kev sib cais ua rau muaj kev hloov pauv hloov pauv ntawm lub ntiaj teb nce ntxiv?
Txij li thaum lub kaw lus raug cais tawm, tsis muaj cua sov tuaj yeem khiav tawm (tus txheej txheem yog li adiabatic), yog li thaum lub zog ntws tawm hauv lub cev, qhov entropy ntawm qhov system nce, piv txwv li Δ Ssys> 0. Yog li ntawd, lub entropy ntawm lub system yuav tsum tau nce rau ib tug spontaneous txheej txheem nyob rau hauv no cais system
Dab tsi ua rau muaj qhov hloov pauv hloov pauv?
Point kev hloov. Point mutation, hloov nyob rau hauv ib tug noob nyob rau hauv uas ib tug hauv paus khub nyob rau hauv lub DNA ib theem zuj zus yog hloov. Kev hloov pauv ntawm cov ntsiab lus feem ntau yog tshwm sim los ntawm kev ua yuam kev thaum lub sij hawm DNA replication, txawm hais tias kev hloov pauv ntawm DNA, xws li los ntawm kev cuam tshuam rau X-rays lossis rau ultraviolet hluav taws xob, kuj tuaj yeem ua rau muaj kev hloov pauv