Video: Puas yog cov viscosities ntawm magmas nce nrog nce feem pua ntawm silica?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov viscosities ntawm magmas nce nrog nce feem pua ntawm silica . Kev tawg ntawm cov roob hluav taws Hawaii tuaj yeem piav qhia tias tawg tau sib piv rau xyoo 1980 Mount St. Helens eruption. Basaltic lavas feem ntau yog kub dua thiab khov dua li andesite lavas.
Ib yam li ntawd ib tug yuav nug, uas magma muaj pes tsawg leeg yog feem ntau tawg?
Gas muab magmas lawv tawg tus cwj pwm, vim tias qhov ntim ntawm cov pa nthuav tawm thaum lub siab txo. Cov muaj pes tsawg leeg ntawm cov gases hauv magma yog: Feem ntau H2O (dej vapor) & qee qhov CO2 (cov pa roj carbon dioxide)
Kub ntawm Magmas
- Basaltic magma - 1000 txog 1200oC.
- Andesitic magma - 800 rau 1000oC.
- Rhyolitic magma - 650 txog 800oC.
Qhov thib ob, qhov muaj pes tsawg leeg ntawm magma cuam tshuam li cas? Magmas txawv hauv muaj pes tsawg leeg , qho cuam tshuam viscosity. Magma muaj pes tsawg leeg muaj loj nyhuv pe qas a roob hluav taws tawg. Felsic lavas yog viscous ntau dua thiab tawg explosively los yog ua tsis yog tawg . Mafic lavas tsis tshua khov thiab tawg effusively.
Hais txog qhov no, cov ntsiab lus silica cuam tshuam li cas rau viscosity ntawm magma?
Magmas uas muaj siab silica cov ntsiab lus Yog li ntawd yuav ua kom pom ntau dua ntawm polymerization, thiab muaj viscosities siab dua, dua li cov uas muaj tsawg- silica cov ntsiab lus . Tus nqi ntawm yaj gases nyob rau hauv lub magma kuj cuam tshuam nws yog viscosity , tab sis nyob rau hauv ib txoj kev tsis meej tshaj qhov kub thiab txias silica cov ntsiab lus.
Yam twg ntawm cov magma hauv qab no muaj cov ntsiab lus roj ntau tshaj?
Felsic magma muaj cov ntsiab lus silica siab tshaj plaws ntawm tag nrho magma hom , ntawm 65-70%. Yog li ntawd, felsic magma kuj muaj cov roj ntau tshaj plaws thiab viscosity, thiab qis tshaj qhov ntsuas kub, ntawm 650 ° thiab 800 ° C (1202 ° thiab 1472 ° Fahrenheit).
Pom zoo:
Yuav ua li cas koj thiaj nrhiav tau cov mis empirical nrog feem pua?
Transcript Faib txhua % los ntawm atomic mass ntawm lub caij. Faib txhua cov lus teb los ntawm qhov tsawg tshaj plaws. Kho cov lej no rau hauv lawv qhov qis tshaj tus lej tag nrho
Qhov feem ntawm 33 1 3 feem pua yog dab tsi?
Piv txwv tus nqi feem pua ntawm cov zauv feem 25% 0.25 1/4 331/3% 0.333 1/3 50% 0.5 1/2 75% 0.75 3/4
Qhov feem pua ntawm DNA tau koom nrog cov tswv cuab ntawm tib neeg?
Muaj ntau tshaj peb lab qhov sib txawv ntawm koj cov genome thiab lwm tus. Ntawm qhov tod tes, peb txhua tus yog 99.9 feem pua zoo tib yam, DNA-wise. (Los ntawm qhov sib txawv, peb tsuas yog kwv yees li 99 feem pua zoo ib yam li peb cov txheeb ze ze tshaj plaws, chimpanzees.)
Yuav ua li cas koj sau ib feem raws li ib tug khoom ntawm ib tug tag nrho cov zauv thiab ib feem feem?
Cov cai los nrhiav cov khoom ntawm ib feem feem thiab tag nrho tus lej Peb xub sau tag nrho cov lej ua ib feem, piv txwv li, sau nws faib los ntawm ib qho; Piv txwv li: 7 yog sau ua 71. Peb mam li muab cov zauv. Peb muab cov denominators. Yog tias yuav tsum tau ua kom yooj yim, nws ua tiav thiab tom qab ntawd peb sau cov feem kawg
Txoj cai thermodynamic twg hais tias koj Tsis tuaj yeem hloov 100 feem pua ntawm cov cua sov rau hauv cov khoom siv hluav taws xob ntawm cov lus teb xaiv?
Txoj Cai thib ob