2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Hnub 4 Lub Yim Hli 2020, ntau cov ammonium nitrate khaws cia ntawm Chaw nres nkoj ntawm Beirut hauv lub nroog Lebanon tawg, ua rau tsawg kawg 218 tus neeg tuag, 7,000 raug mob, thiab US $ 15 nphom hauv kev puas tsuaj, thiab ua rau kwv yees li 300,000 tus neeg tsis muaj tsev nyob.
Dab tsi ua rau cov pa taws liab tom qab tawg?
Cov xim txiv kab ntxwv / xim liab yog tshwm sim los ntawm qhov muaj NO2 uas yog cov khoom ncaj qha ntawm cov txheej txheem detonation, thiab tseem tsim tawm tom qab hlawv cov tshuaj tiv thaiv thiab los ntawm theem nrab. oxidation ntawm TSIS TAU rau NO2 raws li huab cua sib xyaw nrog huab cua.
Dab kub kub liab hauv qhov tawg?
Ib qho ammonium nitrate tawg ua rau cov nitrogen oxides loj heev. Nitrogen dioxide (NO₂) yog cov pa liab, tsw ntxhiab tsw phem. Cov duab los ntawm Beirut nthuav tawm cov xim liab liab sib txawv rau cov pa roj av los ntawm kev tawg.
Vim li cas qee qhov tawg liab?
Nov muaj cov txiv kab ntxwv, liab / xim av uas yog tus yam ntxwv ntawm nitrogen dioxide, ib qho ntawm cov khoom decomposition ntawm ammonium nitrate, uas yog qhov qhia tau zoo heev tias cov tshuaj no yog koom nrog thiab qhov yuav tshwm sim ntawm qhov tawg.
1 kg ntawm TNT puas tuaj yeem ua tau?
Raws li kev tswj hwm ib kilogram ntawm TNT tuaj yeem rhuav tshem (lossis txawm tias obliterate) tsheb me. Qhov kwv yees radiant tshav kub lub zog tso tawm thaum lub sij hawm 3-theem, 600 V, 100 kA arcing txhaum nyob rau hauv ib tug 0.5 m × 0.5 m × 0.5 m (20 nyob rau hauv × 20 nyob rau hauv × 20 nyob rau hauv)compartment hauv 1-thib ob lub sijhawm.
Pom zoo:
Cov pej thuam tawg rau qhov ua tsaug rau qhov twg?
Ob tug mlom raug defaced nyob rau hauv Minneapolis thaum sawv ntxov Thanksgiving, suav nrog ib tug ntawm George Washington uas tau raug tshem tawm. Tus pej thuam George Washington ntawm Fair Oaks Park, tawm tsam Minneapolis Institute of Art, tau kos duab kos duab "
Puas siv hluav taws xob hauv qhov hluav taws xob tuaj yeem siv rau ntawm qhov loj?
Txawm hais tias tsawg dua, lwm hom kev siv hluav taws xob hauv av tuaj yeem siv los muab ntau lub zog ntau dua. Tapping qhov chaw ntawm cov dej kub faus rau hauv qab lub ntiaj teb saum npoo tuaj yeem muab cua sov rau cov neeg coob coob, thiab tsim kom muaj zog txaus los tsim hluav taws xob loj.
Lub tshuab hluav taws xob loj npaum li cas rau qhov chaw nres tsheb tsis muaj hluav taws xob?
Nrhiav lub rhaub nrog BTU tso zis uas phim koj cov txiaj ntsig. Piv txwv li, yog tias koj qhov chaw nres tsheb tsis muaj hluav taws xob yog 484 square feet, koj cov qauv yog 484 / 200 x 9, 000, lossis 21, 780. Koj xav tau lub rhaub nrog tsawg kawg yog 21, 780 BTU tso zis.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Puas qhov chaw taws teeb hluav taws ua haujlwm nrog ib qho hluav taws kub?
Kuv tuaj yeem siv cov chaw taws teeb ntawm 4k qhov hluav taws kub tshiab los ua haujlwm nrog cov hluav taws uas tsis yog 4k qub. … Qhov tseem ceeb yog…yog tias koj muaj 2 rab phom, xyuas kom tseeb tias tus koj tsis xav siv yog tawm. Tom qab ntawd, nyob rau hauv pem hauv ntej ntawm lub qhov hluav taws kub uas koj xav siv, tuav tus yuam sij hauv tsev rau 10-20 vib nas this kom txog thaum nws pib ntsais.
