Video: Vim li cas dej denser li kua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov dej qis dua nyob rau hauv nws daim ntawv yog vim li cas hydrogen bonds yog oriented raws li nws freezes: lub dej molecules raug thawb kom deb sib nrug piv rau kua dej . Lub (a) lattice qauv ntawm cov dej khov ua rau nws tsawg dua ntom tshaj li cov dawb ntws molecules ntawm kua dej , ua kom nws mus (b) ntab rau dej.
Tsis tas li ntawd, vim li cas dej thiaj li ntom ntom ntom nti li cov kua?
Dej yog txawv txawv nyob rau hauv uas nws siab tshaj plaws ceev tshwm sim li ib ua kua , es tsis yog ib qho khoom. Qhov no txhais tau tias cov dej khov floats dej . Rau feem ntau tshuaj, qhov no nce qhov chaw ntawm molecules, ua kom sov kua tsawg ntom tshaj cov khoom txias.
Tom qab, lo lus nug yog, dab tsi ua kua hnyav dua dej? Mercury yog a ua kua ntawm chav tsev kub thiab muaj qhov ntom ntawm 13.6 npaug ntawm dej (ceev faj, mercury's poisonous). Feem ntau cov hlau, thaum melted, yuav yog hnyav dua dej (tab sis tej zaum yuav kub dua dua dej yuav zam), xws li molten txhuas los yog hlau (cov hmoov txhuas kuj lom!).
Tsuas yog li ntawd, dab tsi ua rau cov dej khov ua kom tsawg dua li cov dej ua kua?
Thaum twg dej khov, dej molecules tsim cov qauv crystalline tswj los ntawm hydrogen bonding. Cov dej khov , los yog dej khov , yog tsawg dua cov dej ua kua . Dej khov yog tsawg dua dej vim yog kev taw qhia ntawm hydrogen bonds ua rau molecules kom thawb deb sib nrug, uas txo qis cov ceev.
Dab tsi yog qhov ntom ntawm cov dej?
997 kg/m²
Pom zoo:
Cov kua dej thiab hom kua dej yog dab tsi?
Cov kua dej tuaj yeem muab faib ua plaub yam yooj yim. Cov kua dej zoo tagnrho. Cov kua dej tiag tiag. Newtonian kua dej. Tsis yog-Newtonian Fluid
Vim li cas cov kua siv lead ua kua hloov xim nrog kub?
Cov molecules hauv cov kua siv lead ua kua tuaj yeem txav mus los ntawm nws tus kheej, xws li hauv cov kua, tab sis nyob twj ywm me ntsis, xws li hauv cov khoom siv lead ua (khoom). Cov kua siv lead ua kua no teb rau kev hloov pauv ntawm qhov kub thiab txias los ntawm kev hloov xim. Raws li qhov kub thiab txias, lawv cov xim hloov ntawm liab mus rau txiv kab ntxwv, daj, ntsuab, xiav, thiab ntshav
Vim li cas lub cell membrane yog cov kua dej mosaic qauv?
Cov kua dej mosaic qauv piav qhia txog cov cell membrane raws li cov ntaub ntawv ntawm ntau hom molecules (phospholipids, cholesterols, thiab proteins) uas txav mus tas li. Qhov kev txav no pab cov cell membrane tswj nws lub luag haujlwm ua qhov cuam tshuam ntawm sab hauv thiab sab nraud ntawm lub cell ib puag ncig
Vim li cas cov kua dej ntws?
Qhov no txhais tau hais tias cov kua ua kua yog sib nrug thiab txav tau yooj yim dua. Txij li thaum cov particlescan txav, cov kua tuaj yeem ntws thiab nqa cov duab ntawm nws lub thawv. Qhov no yog vim lub zog ntawm kev nyiam ntawm cov dej hauv dej rub cov khoom ntawm qhov chaw ua ke
Dab tsi yog qhov tseem ceeb tshaj plaws uas yuav tsum muaj rau cov kua dej ntws hauv cov kav dej Dab tsi lwm yam cuam tshuam rau cov dej ntws?
Thaum ib qho kev quab yuam sab nraud yog exerted rau ntawm cov kua uas muaj, qhov tshwm sim siab yog kis sib npaug thoob plaws hauv cov kua. Yog li txhawm rau kom dej ntws, dej xav tau qhov sib txawv siab. Cov kav dej kuj tuaj yeem cuam tshuam los ntawm cov kua dej, cov yeeb nkab loj, qhov kub thiab txias (cov kav dej khov), cov kua dej ntom ntom