Video: Qhov tseem ceeb ntawm Millikan qhov kev sim roj poob yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Millikan qhov kev sim yog tseem ceeb vim nws tau tsim cov nqi ntawm ib qho hluav taws xob. Millikan siv ib qho yooj yim heev apparatus uas nws balanced cov kev ua ntawm gravitational, hluav taws xob, thiab (cua) luag quab yuam. Siv cov cuab yeej no, nws muaj peev xwm xam tau tias tus nqi ntawm lub tshuab hluav taws xob yog 1.60 × 10?¹? C.
Ntxiv mus, qhov tseem ceeb ntawm Millikan qhov kev sim roj poob yog dab tsi?
Xyoo 1909, Robert Millikan thiab Harvey Fletcher tau ua roj poob kev sim los txiav txim qhov nqi ntawm ib qho hluav taws xob. Lawv tau tshem tawm cov dej me me ntawm roj nruab nrab ntawm ob hlau electrodes los ntawm ntsuas downward gravitational quab yuam nrog upward drag thiab fais fab.
Ib sab saum toj no, vim li cas Millikan tseem ceeb? Robert Andrews Millikan (Lub Peb Hlis 22, 1868 - Lub Kaum Ob Hlis 19, 1953) yog ib tus kws tshawb fawb Asmeskas tau txais txiaj ntsig los ntawm Nobel nqi zog rau Physics hauv xyoo 1923 rau kev ntsuas cov nqi hluav taws xob qis thiab rau nws txoj haujlwm ntawm cov nyhuv photoelectric.
Raws li txoj cai, vim li cas cov roj siv hauv kev sim roj poob?
Cov roj yog hom feem ntau siv nyob rau hauv lub tshuab nqus tsev vacuum thiab raug xaiv vim nws muaj ib tug tsis tshua muaj vapor siab. Ib txwm roj yuav evaporate nyob rau hauv lub tshav kub ntawm lub teeb qhov chaw ua rau lub loj ntawm lub vaj xo hloov dua lub sij hawm kev sim.
Puas yog roj zoo lossis tsis zoo?
Raws li rau roj , nws yog cov tshuaj tsis muaj polar. Txij li cov atoms nyob rau hauv fatty acids nyob rau hauv roj qhia lawv cov electrons zoo, lawv (feem ntau) tsis muaj nqi , los yog tsawg kawg tsis txaus ua rau tag nrho cov molecule polar. Muab lawv tsis muaj tus nqi zoo lossis tsis zoo , lawv tsis attracted rau ib tug polar molecule zoo li dej.
Pom zoo:
Qhov loj ntawm daim teb hauv Millikan qhov kev sim roj poob tau txiav txim siab li cas?
Millikan roj-poob sim, thawj qhov ncaj qha thiab kev ntsuas ntawm cov nqi hluav taws xob ntawm ib qho hluav taws xob. Millikan tau ntsuas ob qho tib si ntawm qhov hluav taws xob quab yuam thiab qhov loj ntawm qhov hluav taws xob ntawm qhov me me ntawm cov roj tso tawm thiab los ntawm cov ntaub ntawv txiav txim siab qhov loj ntawm tus nqi nws tus kheej
Ob qhov tseem ceeb ntawm lub voj voog ntawm tes yog dab tsi thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Muaj ob theem tseem ceeb hauv lub voj voog ntawm tes. Thawj theem yog interphase thaum lub cell loj hlob thiab replicates nws DNA. Qhov thib ob yog theem mitotic (M-Phase) thaum lub sijhawm cell faib thiab hloov ib daim qauv ntawm nws cov DNA mus rau ob lub hlwb zoo tib yam
Robert Millikan roj poob kev sim yog dab tsi?
Xyoo 1909, Robert Millikan thiab Harvey Fletcher tau ua qhov kev sim roj los txiav txim seb tus nqi hluav taws xob. Lawv tshem tawm cov me me tee dej ntawm cov roj ntawm ob lub hlau electrodes los ntawm kev sib npaug downward gravitational quab yuam nrog upward drag thiab fais fab
Cov roj twg yog siv hauv Millikan roj poob txoj kev?
1 Teb. Ernest Z. Millikan siv lub tshuab nqus tsev roj rau nws qhov kev sim
Dab tsi yog 2 qhov tseem ceeb ntawm lub voj voog ntawm tes thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Cov xwm txheej no tuaj yeem muab faib ua ob qhov tseem ceeb: interphase (hauv nruab nrab ntawm kev sib faib theem ua pawg G1 theem, S theem, G2 theem), thaum lub xov tooj ntawm tes tsim thiab ua nrog nws cov haujlwm metabolic; mitotic theem (M mitosis), thaum lub sij hawm lub cell yog replicating nws tus kheej