2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Kev ntsuas rhiab nyob rau hauv chav tsev kub, PETN-PO thiab PETN-CH muaj qhov ntsuas siab dua rau kev cuam tshuam ntau dua li lwm cov ntaub ntawv, nrog kev poob siab ntawm ∼8 ± 2 cm, siv 2.5 kg poob qhov hnyav (PETN muajcuam tshuam rhiab ntawm 12 ± 2 cm; cov lej loj dua qhia cov ntaub ntawv rhiab tsawg).
Dab tsi yog qhov tawg yooj yim tshaj plaws?
Azidoazide azide yog cov tshuaj tawg ntau tshaj plaws puas tau tsim. Nws yog ib feem ntawm cov chav kawm ntawm cov tshuaj hu ua high-nitrogen energetic cov ntaub ntawv, thiab nws tau txais nws "bang" los ntawm 14 nitrogen atoms uas tsim nws nyob rau hauv ib tug xoob khi lub xeev. Cov khoom no yog ob qho tib si reactive thiab tawg heev.
PETN muaj zog npaum li cas?
PETN yog cov khoom tawg muaj zog nrog tus txheeb ze ua tau zoo ntawm 1.66. Thaum sib xyaw nrog cov yas yas, PETN tsim cov yas tawg.
Puas yog PETN yog tub rog tawg?
3 A tub rog-qib tawg: pentaerythritol tetranitrate. Pentaerythritol tetranitrate (PETN) yog cov khoom tseem ceeb hauv ntau cov khoom lag luam thiab tub rog tawg.
Yuav ua li cas yog cov khoom tawg yooj yim tshaj plaws?
EPX-1 muaj lub siab tshaj plaws detonation tshaj tawm ntawm txhua qhov kev tshawb fawb cov khoom tawg. Qhov ntsuas detonation siab thiab kub ntawm detonation ntawm EPX-1 yog nyob rau tib theem ntawm Semtex 10 thiab siab dua li qhov seem ntawm cov khoom tawg tau kawm.
Pom zoo:
Puas gluten rhiab heev tiag?
Cov pov thawj tshiab tau tsim gluten rhiab heev gluten rhiab heev kab mob Celiac yuav cuam tshuam rau lub neej expectancy Kev tshawb fawb tsis ntev los no luam tawm hauv JAMA pom qhov me me tab sis tseem ceeb nce kev pheej hmoo ntawm kev tuag.
Puas yog cov fibers rhiab heev yog thermosetting?
Heat Sensitive Fibers tiag tiag muaj Thermosetting daim ntawv thov. Kev piav qhia: Lub thermoset yog hardened thaum tshav kub rov qab, thiab yog li nws ua raws li tus neeg sawv cev thermosetting. Rau cov ntawv thov kub kub ib lub thermoset yog qhov zoo tshaj plaws.
Puas yog cones rhiab rau lub teeb ci?
Raws li cov pas nrig, cones muaj ib qho ntawm peb hom xim uas yog: S-cones (absorbs xiav), M-cones (absorbs ntsuab) thiab L-cones (absorbs liab). Txhua lub khob hliav qab yog li ntawd rhiab rau pom wavelengths ntawm lub teebuas sib haum rau liab (ntev-ntev), ntsuab (nruab nrab-ntev), lossis xiav (short-wavelength) lub teeb.
Ntev npaum li cas koj mus deb npaum li cas?
Txoj kev mus deb yog txoj kev uas lub cev tau txais los ntawm qhov pib taw tes mus rau qhov kawg ntawm lub sijhawm, ntawm qhov nrawm. Yog hais tias qhov nrawm tsis tas li: Distance=lub sijhawmnrawm. tag nrho ntev mus li cas? Txoj kev mus deb yog tag nrho ntawm txoj kev taug kev ntawm ob txoj haujlwm.
Vim li cas rhiab txhais tau tias?
Sensitization yog tsis yog-kev kawm cov txheej txheem uas rov ua haujlwm ntawm qhov kev txhawb nqa ua rau kev nce qib ntawm cov lus teb. Kev hnov mob feem ntau yog tus cwj pwm los ntawm kev txhim kho cov lus teb rau tag nrho cov chav kawm ntawm stimuli ntxiv rau qhov rov ua dua.
