Vim li cas qhov ntom ntawm cov dej siab tshaj ntawm 4?
Vim li cas qhov ntom ntawm cov dej siab tshaj ntawm 4?

Video: Vim li cas qhov ntom ntawm cov dej siab tshaj ntawm 4?

Video: Vim li cas qhov ntom ntawm cov dej siab tshaj ntawm 4?
Video: Vim li cas koj lub neej thiaj li tsis txawj muaj nyiaj yog ua cas? ( How to Change your life) 2024, Kaum ib hlis
Anonim

Cov qhov siab tshaj plaws ntawm cov dej tshwm sim ntawm 4 °C vim tias, ntawm qhov kub no, ob qhov cuam tshuam tawm tsam tsis sib npaug. Kev piav qhia: Hauv dej khov, lub dej molecules yog nyob rau hauv acrystal lattice uas muaj ntau qhov chaw khoob. Thaum cov dej khov meltsto kua dej , tus qauv collapses thiab cov ceev ntawm cov kua nce.

Ib yam li ntawd, koj tuaj yeem nug, dab tsi yog qhov ntom ntawm cov dej ntawm 4 degree?

Dej muaj nws qhov siab tshaj plaws ceev ntawm 1 g / cm33 ntawm 4 degrees Celsius. Thaum qhov kub thiab txias hloov los ntawm ntau dua lossis tsawg dua 4 degrees , cov ceev yuav tsawg dua 1 g / cm23. Dej muaj qhov siab tshaj plaws ceev ntawm 1 g / cm33tsuas yog thaum nws ntshiab dej.

Kuj Paub, vim li cas dej thiaj li muaj qhov ntom ntom? Cov molecules ntawm cov dej yog nyob ze ua ke, thiab qhov no nce lub ceev ntawm cov kua. Raws li qhov kub thiab txias dej txo, cov dej molecules qeeb thiab cov ceev nce. Clusterformation yog cov nyhuv loj dua, yog li cov ceev pib txo. Yog li ntawd, lub ceev ntawm dej yog ib siab kawg ntawm 4 ° C.

Ntxiv mus, nyob rau theem twg yog qhov dej ntom ntom tshaj plaws?

Ib qho tshwj xeeb tseem ceeb tsis xwm yeem siab tshaj plaws ceev yog o dej , uas ncav a ceev ncov ntawm 3.98 ° C (39.16 ° F). Qhov no muaj qhov cuam tshuam tseem ceeb hauv ntiaj teb ecosystem.

Puas yog qhov ntom ntawm cov dej siab?

Qhov ntom yog qhov loj ntawm ib chav tsev ntim ntawm asubstance. Cov qhov ntom ntom ntawm cov dej feem ntau yog muab li 1 g / cm23, tab sis hauv qab no yog qhov ntom ntawm cov dej nrog sib txawv units. Nws tsis yog coincidence uas dej muaj ib ceev ntawm 1.

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