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Hais txog Bar Magnets - Sib Nqus Zog Thiab Yuav Xaiv Li Cas
Bar hlau nplaum tuaj yeem muab faib ua ib qho ntawm ob hom: mus tas li thiab ib ntus.Cov hlau nplaum tas mus li yeej ib txwm nyob rau hauv txoj hauj lwm "on";uas yog, lawv cov magnetic teb yeej ib txwm nquag nquag thiab tam sim no.Cov hlau nplaum ib ntus yog cov khoom siv hlau nplaum thaum ua los ntawm cov hlau nplaum uas twb muaj lawm.Perh...Nyeem ntxiv -
Qhov sib txawv ntawm cov khoom sib nqus sib txawv
Cov hlau nplaum tau los ntev heev txij li hnub koj tseem hluas thaum koj siv sijhawm teev los npaj cov xim zoo nkauj ntawm cov ntawv hlau nplaum rau koj niam lub qhov rooj tub yees.Niaj hnub no cov hlau nplaum muaj zog dua puas tau thiab lawv ntau yam ua rau lawv muaj txiaj ntsig zoo rau ntau yam kev siv.Rare earth thiab ce...Nyeem ntxiv
