Cov txheej txheem:
Video: Dab tsi yog tag nrho cov dej num?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub ntsiab khoom ntawm dej yog nws polarity, cohesion, adhesion, nto nro, siab tshwj xeeb kub, thiab evaporative txias. A dej molecule raug them me ntsis ntawm ob qhov kawg. Qhov no yog vim muaj oxygen ntau dua electronegative dua hydrogen.
Tib neeg kuj nug, 7 yam dej num yog dab tsi?
7 Cov khoom ntawm cov dej yog:
- polarity,
- kev sib koom tes.
- adhesion.
- nto nro.
- kub tshwj xeeb.
- evaporative txias.
Tsis tas li ntawd, muaj pes tsawg lub zog dej muaj? Nyob ntawd yog 3 yam sib txawv ntawm dej , sau H2O: khoom (ice), kua ( dej ), thiab gas (steam). Vim dej zoo li ubiquitous, ntau cov neeg tsis paub txog qhov txawv txawv thiab txawv khoom ntawm dej , suav nrog: Boiling Point thiab Freezing Point. Nto Ntog, Kub ntawm Vaporization, thiab Vapor Siab.
Ntxiv mus, dab tsi yog 5 yam khoom ntawm dej?
5 Cov Khoom Siv Dej
- Nws attraction rau polar molecules.
- Cov cua kub tshwj xeeb.
- High tshav kub ntawm vaporization.
- Cov dej khov qis dua.
- Siab polarity.
Dab tsi yog qhov tseem ceeb tshaj plaws ntawm cov dej?
Cov cov khoom tseem ceeb tshaj plaws ntawm cov dej yog khoov. Raws li molecule, dej yog bent. Qhov no khoov yog dab tsi ua rau lub polarity ntawm dej . Nyob rau hauv lem, no polarity yog lub luag hauj lwm rau yuav luag tag nrho cov notable cov khoom ntawm dej , suav nrog lub peev xwm kub thiab qhov ntom ntom ntawm cov dej khov, uas yog ob qho ntawm cov tseem ceeb tshaj plaws tshwm sim.
Pom zoo:
Dab tsi yog electromagnetic nthwv dej tag nrho muaj sib xws?
Lawv txhua tus muaj cov khoom sib xws. Hauv lub tshuab nqus tsev, lawv txhua tus taug kev ntawm tib qhov ceev - qhov ceev ntawm lub teeb - uas yog 3 × 108 m / s. Lawv yog cov transverse nthwv dej, nrog cov oscillations yog hluav taws xob thiab magnetic teb. Zoo li tag nrho cov nthwv dej, lawv tuaj yeem cuam tshuam, refracted thiab diffraction
Dab tsi yog cov lej suav tag nrho cov lej suav lej thiab lej lej?
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Dab tsi yog qhov cuam tshuam ntawm cov kab mob nroj tsuag uas rhuav tshem tag nrho cov chloroplasts hauv cov nroj tsuag?
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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
Ntau npaum li cas ntawm cov pej xeem hauv ntiaj teb nyob ntawm cov kab ke roob rau tag nrho lossis qee qhov ntawm lawv cov dej?
Roob yog lub ntiaj teb "dej yees," muab 60-80% ntawm tag nrho cov dej tshiab rau peb ntiaj chaw. Tsawg kawg ib nrab ntawm lub ntiaj teb cov pej xeem nyob ntawm roob ecosystem kev pabcuam kom muaj sia nyob - tsis yog dej xwb, tab sis kuj muaj zaub mov thiab lub zog huv