Kev Taw Qhia Zog yog ib qho ntawm cov kev xav tau tseem ceeb ntawm tib neeg uas tsis tuaj yeem sib cais tau ntawm lub neej txhua hnub. Txij li thaum muaj kev hloov pauv hauv kev lag luam, kev siv zog tau nce ntxiv sai sai, feem ntau yog cov roj fossil xws li roj, thee, thiab roj av. Txawm hais tias cov peev txheej no tau tsav kev lag luam thiab kev nce qib hauv kev siv tshuab, lawv kuj muaj kev cuam tshuam tsis zoo rau ib puag ncig ... Nyeem ntxiv
Lub zog hluav taws xob yog ib qho tseem ceeb tshaj plaws ntawm lub neej niaj hnub no. Cov peev txheej hluav taws xob siv los tsim hluav taws xob tuaj yeem muab faib ua ob pawg tseem ceeb: rov ua dua tshiab thiab tsis rov ua dua tshiab. Ob hom peev txheej hluav taws xob ua lub luag haujlwm tseem ceeb hauv lub ntiaj teb hluav taws xob, txhua tus muaj lawv tus kheej qhov zoo thiab kev cov nyom. Tsab xov xwm no yuav tshuaj xyuas ntau hom chaw tsim hluav taws xob rov ua dua tshiab… Nyeem ntxiv
Lub zog yog ib qho tseem ceeb ntawm lub neej niaj hnub no, muab zog rau txhua yam los ntawm kev thauj mus los thiab kev lag luam mus rau lub neej txhua hnub. Cov peev txheej zog tau muab faib ua ob pawg tseem ceeb: rov ua dua tshiab thiab tsis rov ua dua tshiab. Txhua tus muaj nws tus yam ntxwv, qhov zoo, thiab cov teeb meem. Tsab xov xwm no yuav tham txog qhov tob txog cov lus txhais, hom, qhov zoo, thiab qhov tsis zoo ntawm cov peev txheej rov ua dua tshiab thiab tsis rov ua dua tshiab, nrog rau… Nyeem ntxiv
Kev ua haujlwm ntawm cov pa roj radioactivity yog ib qho xwm txheej uas tshwm sim thaum cov nuclei atomic tsis ruaj khov lwj thiab tso cov khoom me me lossis hluav taws xob tawm. Qhov xwm txheej no tau tshawb pom thaum xyoo pua 19th thiab tau ua rau muaj ntau yam kev hloov pauv tshiab hauv kev tshawb fawb, thev naus laus zis, thiab tshuaj. Tsab xov xwm no yuav tshawb nrhiav cov ntsiab cai tseem ceeb ntawm kev ua haujlwm ntawm cov pa roj radioactivity, cov hom kev lwj ntawm cov pa roj radioactivity, nws cov ntawv thov hauv ntau qhov chaw, thiab ... Nyeem ntxiv
Cov tshuaj tiv thaiv fission yog ib qho ntawm cov xwm txheej ntuj tsim uas txaus nyiam thiab muaj feem cuam tshuam tshaj plaws hauv nuclear physics. Los ntawm kev faib cov nuclei atomic hnyav rau hauv cov sib dua, cov tshuaj tiv thaiv fission tso tawm ntau lub zog, uas tau siv rau ntau yam kev siv, los ntawm kev tsim hluav taws xob mus rau riam phom nuclear. Tsab xov xwm no yuav tshawb nrhiav cov hauv paus ntsiab lus ntawm cov tshuaj tiv thaiv fission ... Nyeem ntxiv
Cov tshuaj tiv thaiv nuclear yog cov txheej txheem uas cov nuclei atomic sib cuam tshuam nrog ib leeg los tsim cov nuclei tshiab lossis cov khoom me me sib txawv. Ib qho ntawm cov hom tshuaj tiv thaiv nuclear uas txaus nyiam tshaj plaws thiab muaj peev xwm muaj zog tshaj plaws yog kev sib xyaw ua ke. Kev sib xyaw ua ke yog cov txheej txheem ntawm ob lub nuclei sib xyaw ua ke los tsim cov nuclei hnyav dua, nrog rau kev tso tawm lub zog loj heev ... Nyeem ntxiv
Kev xav rov qab yog ib lub tswv yim tseem ceeb hauv kev lej, tshwj xeeb tshaj yog hauv geometry. Nws piav qhia txog cov txheej txheem uas ib yam khoom raug xav rov qab, lossis mirrored, los tsim ib daim duab uas sib npaug rau ib txoj kab lossis lub dav hlau. Hauv tsab xov xwm no, peb yuav tshawb nrhiav lub tswv yim ntawm kev xav rov qab, nws siv li cas hauv ntau qhov xwm txheej, thiab nws qhov tseem ceeb hauv kev kawm thiab kev siv lej. Nkag siab txog Kev Xav Rov Qab… Nyeem ntxiv
Cov Lus Nug Piv Txwv thiab Kev Sib Tham Siv Qhov Sib Npaug Tsis Tu Ncua Hauv Kev Xam Xaj Kev Taw Qhia Chemistry yog kev kawm txog cov tshuaj thiab cov kev hloov pauv uas tshwm sim hauv cov tshuaj ntawd. Ib lub tswv yim tseem ceeb hauv chemistry yog kev sib npaug ntawm cov tshuaj, qhov twg cov tshuaj tiv thaiv mus txog lub xeev uas tus nqi ntawm cov tshuaj tiv thaiv pem hauv ntej sib npaug rau tus nqi ntawm cov tshuaj tiv thaiv rov qab. Hauv kev sib npaug ntawm cov tshuaj, qhov concentration ntawm cov reactants… Nyeem ntxiv
Lub nucleus atomic yog qhov me tshaj plaws thiab tseem ceeb tshaj plaws uas ua rau txhua yam khoom hauv lub ntiaj teb. Kev nkag siab txog cov qauv ntawm lub nucleus atomic yog qhov tseem ceeb rau kev nkag siab txog ntau yam xwm txheej ntawm lub cev thiab tshuaj. Tsab xov xwm no yuav tshawb nrhiav txog cov qauv ntawm lub nucleus atomic, los ntawm nws keeb kwm ntawm kev tshawb pom, nws cov khoom, cov zog ua haujlwm hauv nws, mus rau nws cov kev cuam tshuam rau kev tshawb fawb thiab thev naus laus zis. Keeb Kwm ntawm Kev Tshawb Pom… Nyeem ntxiv
Cov thev naus laus zis digital tau dhau los ua ib feem tseem ceeb ntawm peb lub neej txhua hnub. Cov kev nce qib ntawm thev naus laus zis no tau hloov pauv txoj kev uas peb sib txuas lus, ua haujlwm, kawm, yuav khoom, thiab txawm tias nyob hauv peb lub neej. Hauv tsab xov xwm no, peb yuav tham txog ntau yam kev siv thev naus laus zis digital hauv lub neej txhua hnub thiab lawv qhov cuam tshuam dav dav rau zej zog. Kev sib txuas lus: Ib qho ntawm cov kev cuam tshuam loj tshaj plaws ntawm thev naus laus zis digital yog nyob rau hauv… Nyeem ntxiv