2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Tab sis qhov hluav taws xob tuaj ntawm qhov twg? Thiab thaum twg nws tshwm sim? Thawj qhov tau tsim nyob rau hauv lub tebchaws Yelemes hauv xyoo 1850, hais tias Dennis Manochio Sr., tus kws sau keeb kwm rau American Pyrotechnic Association (APA) hauv Chestertown, Md., thiab tus saib xyuas ntawm 4th ntawm Lub Xya Hli Americana & Tsev khaws puav pheej foob pob hluav taws hauv Saratoga, Calif.
Thaum twg yog thawj sparkler invented?
Tus thawj sparkler hu ua Cherosiphon thiab nws tau tsim nyob rau hauv AD 670 los ntawm ib tug pej xeem ntawm Heliopolis hu ua Callinicos. Nws qhov kev tsim khoom yog tsim los ua riam phom hu ua "Greek hluav taws" thiab nws tau siv los ze rau cov yeeb ncuab nkoj.
Thaum twg sparklers nrov?
Raws li keeb kwm ntawm sparklers, Suav tau tshawb pom thiab pib tsim cov foob pob hluav taws qee zaum ze rau xyoo pua AD. Raws li cov foob pob hluav taws tau dhau los ua qhov nyuaj thiab dav dav, qhov nrawm dhau los ua tus qauv ntawm yuav luag txhua qhov kev ua koob tsheej hauv Asia.
Cov sparklers qub ua los ntawm dab tsi?
Lawv feem ntau muaj xws li sticks nrog nyias, tsis-combustible hlau xaim dipped nyob rau hauv ib tug pyrotechnic slurryuas tso cai rau qeeb thiab muaj xim kub thaum ignited. Cov qauv tam sim no ntawm lub sparkler tuaj ntawm German wunderkerzen los ntawm 1850s, uas yog hlau coated nyob rau hauv hlau thiab phom.
Vim li cas cov sparklers ci?
Sparklers qhov tseeb muaj ib qho zoo sib xws rau foob pob hluav taws: combustion. Cov hmoov hlau thiab cov oxidizer (feem ntau yog potassium nitrate) sib tovthiab tsim lub zog loj heev. Qhov no ua rau lub teeb ci, nrog rau qee qhov cua sov thiab lub suab "popping" uas koj tau txais nrog sparklers.
Pom zoo:
Thaum twg cov tswj tau tsim?
thawj gaming maub los yog paddle, nws tau tsim nyob rau hauv 1972 los ntawm ATARI. Tus thawj tswj hwm yog dab tsi? The Magnavox Odyssey yog thawj qhov kev ua lag luam ua lag luam, thiab nws cov tswj hwm tau ua tiav, tab sis siv tau.
Thaum twg yog cov txheej txheem aseptic tau tsim?
Antisepsis lossis asepsis? Kev phais tshuaj tua kab mob tau ua ntau yam los ntawm Yauxej Lister hauv xyoo 1860, thaum nws siv phenol (paub thaum lub sijhawm ua carbolic acid) ua tshuaj tua kab mob. Leej twg pom cov txheej txheem aseptic?
Thaum twg cov nkoj tawm hauv nkoj tau tsim?
Qhia hauv Australia hauv 1974 thiab ob xyoos tom qab hauv Asmeskas thiab Europe, Mariner tam sim ob npaug ntawm qhov muaj peev xwm faib rau Mercury Marine. Leej twg tsim Mariner outboard motors? Tam sim no, Mercury cov khoom lag luam suav nrog Mercury, Mercury Racing, MerCruiser, thiab Mariner outboards (muag sab nraud Asmeskas).
Los ntawm cov khoom tsim thaum lub sij hawm tsim cov bakelite yog?
Nyob rau hauv rooj plaub ntawm bakelite phenol thiab formaldehyde condense los tsim cov monomer muab H2O raws li cov khoom lag luam. Bakelite tseem hu ua co-polymer. Cov tshuaj tiv thaiv: Phenol reacts nrog formaldehyde los tsim o-Hydroxy methyl phenol.
Thaum twg tau ya pob tw tau tsim?
Raws li kev txhawb nqa sab nraud, lub dav hlau ya tau tsim tawm thaum lub sijhawm qub qub thiab tom qab ntawd tau vam meej nyob rau lub sijhawm Gothic lub sijhawm Gothic lub sijhawm Gothic kos duab yog a style ntawm medieval art uas tau tsim nyob rau sab qaum teb Fabkis tawm ntawm Romanesque art nyob rau hauv lub xyoo pua 12th AD, coj los ntawm kev txhim kho ntawm Gothic architecture.
