2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Hnub txuag lub sijhawm, tseem hu ua lub sijhawm txuag lub sijhawm nruab hnub lossis nruab hnub, thiab lub caij ntuj sov, yog qhov kev coj ua ntawm cov moos ua ntej thaum lub hli sov so kom qhov tsaus ntuj poob rau lub sijhawm tom ntej.
Puas yog peb ua hnub ci txuag lub sijhawm xyoo 2021?
Rau xyoo 2021, hnub txuag (tsis txuag) sijhawm yuav xaus 2 teev sawv ntxov, Hnub Sunday, Kaum Ib Hlis 7. Lub sijhawm ntawd, lub sijhawm yuav "rov qab" mus txog 1 teev sawv ntxov. thiab tib neeg tuaj yeem txaus siab rau ib teev ntxiv ntawm kev pw tsaug zog.
Txoj cai rau Hnub Txuag Hnub yog dab tsi?
DST hauv Tebchaws Meskas pib txhua xyoo rau hnub thib ob Hnub Sunday hauv lub Peb Hlis thaum lub sijhawm teem rau 1 teev. Lawv raug muab rov qab mus rau lub sij hawm txheem thawj hnub Sunday thaum lub Kaum Ib Hlis thaum DST xaus.
Puas yog kev txuag nruab hnub pib lossis xaus?
hnub txuag lub sij hawm ces xaus rau thawj hnub Sunday nyob rau lub Kaum Ib Hlis, thaum lub moos tsiv rov qab ib teev ntawm 2 teev sawv ntxov lub hnub ci hauv zos (yog li ntawd lawv mam li nyeem 1 teev sawv ntxov hauv zos tus qauv lub sijhawm). Xyoo 2021, DST pib thaum Lub Peb Hlis 14 thiab xaus rau Lub Kaum Ib Hlis 7 hauv Teb Chaws Asmeskas, thaum koj yuav teem lub moos rov qab ib teev thiab lub voj voog yuav pib dua.
Lub xeev twg thiaj li tshem tawm Hnub Nruab Hnub?
Hawaii thiab Arizona tsuas yog ob lub xeev hauv Tebchaws Meskas uas tsis saib lub sijhawm txuag nruab hnub. Txawm li cas los xij, ntau thaj chaw txawv teb chaws tsis ua raws li kev txuag lub sijhawm nruab hnub. Cov cheeb tsam no suav nrog Asmeskas Samoa, Guam, Northern Mariana Islands, Puerto Rico, thiabTeb Chaws Asmeskas Virgin Islands.
Pom zoo:
Thaum lub sijhawm tawg hluav taws xob hluav taws xob yog?
Volcanic eruptions tsim peb yam khoom: gas, lava, thiab fragmented khib nyiab hu ua tephra. Cov ntaub ntawv dab tsi siv rau hauv kev tawg hluav taws kub? ash, ciders, kub tawg, thiab cov foob pob pov tseghauv cov khoom tawg yog cov khoom loj uas tau pom nyob rau hauv volcanic eruptions thoob ntiaj teb.
Puas yog lub tshuab hluav taws xob xav tau lub tshuab hluav taws xob?
Diesels tsis xav tau lawv - pob tseg li qub / tshuab tawm li qub yog tsim los rau qhov chaw nruab nrab ntawm lub turbo thiab lub throttle. Nyob rau hauv ib tug petrol engine, ntawm siab boost, thaum koj snap lub throttle kaw lub turbo tseem tig.
Puas hluav taws xob hluav taws xob puas tsim hluav taws xob?
Coal feem ntau siv roj los tsim hluav taws xobhauv Tebchaws Meskas. Hauv cov chaw tsim hluav taws xob hluav taws xob hluav taws xob, cov hluav taws xob bituminous, subbituminous thee, lossis lignite raug hlawv. Cov cua kub uas tsim los ntawm kev sib xyaw ntawm cov thee yog siv los hloov cov dej mus rau hauv qhov chaw siab zog, uas tsav lub turbine, uas tsim hluav taws xob.
Lub tshuab hluav taws xob hluav taws xob tsim hluav taws xob li cas?
Piav seb lub twj hluav taws xob hluav taws xob tsim hluav taws xob hla lub membrane li cas. Los ntawm pum electrons hla lub membrane, sab uas cov electrons raug tshem tawm muaj qhov zoo dua, thaum sab tau txais cov hluav taws xob ntau muaj qhov tsis zoo.
Puas yog lub tshuab hluav taws xob puas muaj lub tshuab hluav taws xob?
Vim li cas lub tshuab hluav taws xob sab hauv combustion yuav tsum tsis muaj lub tshuab hluav taws xob los ua kom cov roj tsis zoo li roj av? Spark plugs yog siv nyob rau hauv cov roj cav mus ignite cov pa roj sib tov whereas nyob rau hauv diesel engines lub xub ntiag ntawm lub txim plugs yog tsis tsim nyog.
