2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ferberite feem ntau tshwm sim hauv pegmatites, granite greisens, thiab kub kub hydrothermal deposits. Nws yog ib qho me me ntawm tungsten. Ferberite tau pom nyob rau xyoo 1863 hauv Sierra Almagrera, Spain, thiab muaj npe tom qab German mineralogist Moritz Rudolph Ferber (1805-1875).
wolframite siv rau dab tsi?
Wolframite tau muaj nuj nqis heev raws li lub hauv paus tseem ceeb ntawm cov hlau tungsten, cov khoom siv ntom ntom ntom nti thiab cov cuab yeej siv hluav taws xob muaj zog thiab cov cuab yeej siv hluav taws xob. Ammunition, li zoo li nyuaj tungsten carbide tshuab cuab yeej.
Puas scheelite ci?
Scheelite fluoresces nyob rau hauv luv luv ultraviolet lub teeb, lub mineral glows lub ntuj kaj-xiav. Lub xub ntiag ntawm molybdenum kab impurities qee zaus ua rau lub teeb ntsuab. Fluorescence ntawm scheelite, qee zaum cuam tshuam nrog ib txwm kub, yog siv los ntawm geologists hauv kev tshawb nrhiav kub deposits.
pob zeb dab tsi yog wolframite pom hauv?
Wolframite yog tus thawj coj thiab thawj ore ntxhia ntawm tungsten, thiab feem ntau cuam tshuam nrog cov tin ore hauv thiab ib ncig granite lub teb chaws pob zeb . Wolframite yog ib qho hlau manganese tungsten oxide {(Fe. Mn)WO4} ntxhia.
Vim li cas nws thiaj hu ua wolframite?
Lub npe wolfram los los ntawm cov pob zeb hauv lub caij tau pom nyob rau hauv, wolframite. Wolframite txhais tau tias "tus devourer ntawm tin," uas yog qhov tsim nyog txij li cov ntxhia cuam tshuam nrogsmelting ntawm tin.
Pom zoo:
Thaum twg ferberite nrhiav tau?
Ferberite feem ntau tshwm sim hauv pegmatites, granite greisens, thiab kub hydrothermal deposits. Nws yog ib qho me me ntawm tungsten. Ferberite tau pom nyob rau hauv 1863 hauv Sierra Almagrera, Spain, thiab muab lub npe tom qab German mineralogist Moritz Rudolph Ferber (1805–1875).
Qhov khoom nyob rau pem hauv ntej ntawm lub lens diverging nyob qhov twg?
Teb: Dav hlau daim iav Dav Hlau Daim iav Rau lub teeb rays tawm lub dav hlau daim iav, lub lub kaum sab xis ntawm kev xav sib npaug ntawm lub kaum sab xis ntawm qhov xwm txheej. … Daim duab tsim los ntawm daim iav dav hlau yog ib txwm virtual (lub ntsiab lus tias lub teeb rays tsis yog los ntawm daim duab), upright, thiab ntawm tib lub duab thiab loj npaum li cov khoom nws yog reflecting.
Kev tsis ncaj ncees nyob qhov twg yog qhov hem rau kev ncaj ncees nyob txhua qhov chaw?
Martin Luther King tau hais tias: “Kev tsis ncaj ncees nyob txhua qhov chaw yog kev hem thawj rau kev ncaj ncees nyob txhua qhov chaw. Peb raug ntes nyob rau hauv ib tug inescapable network ntawm kev sib nrig sib pab, khi nyob rau hauv ib lub tsoos tsho ntawm txoj hmoo.
Qhov twg yog qhov tsis txaus ntseeg nyob qhov twg?
Yuav muaj ob lub cev tsis zoo nyob rau hauv lub midbrain. Lawv yog symmetrically positioned, ib tug nyob rau ntawm ob sab ntawm lub midline ntawm lub hlwb, thiab lawv tsim ob lub pob nyob rau hauv lub posterior nto ntawm lub paj hlwb nyob rau hauv qab ntawm lub superior colliculi.
Qhov twg tag nrho cov nqi hluav taws xob nyob ntawm qhov kev siv nyiaj siab tshaj plaws yog qhov twg?
marginal utility is zero. Tag nrho cov nqi hluav taws xob yog siab tshaj thaum marginal utility yog xoom. Qhov no yog vim muaj ntau txoj cai ntawm kev txo qis marginal utility uas hais tias tus neeg siv khoom noj ntau thiab ntau qhov zoo, qhov ntxiv rau tag nrho cov nqi hluav taws xob poob.
