Qhov nro ntawm cov dej tuaj yeem tuav qhov hnyav me me. … Raws li cov hlau ntim me me thiab lub teeb txaus kom tsis txhob tawg qhov nro ntawm cov dej, lawv tsuas yog pw rau saum. Yog tias koj thawb lawv mus rau hauv qab dej, lawv yuav nyob ntawd.
Yuav ua li cas thaum koj muab cov ntaub hlau tso rau hauv dej?
Yog tias koj muab cov ntaub ntawv hlau tso rau hauv cov kua dej, txawm li cas los xij, koj tuaj yeem pom cov duab ntawm cov hlau nplaum zoo dua. … Cov kua dej ua rau cov ntaub ntawv hlau qeeb qeeb, uas pab saib cov kab hlau nplaum zoo dua.
Koj puas tuaj yeem cais cov ntaub ntawv hlau los ntawm dej?
Kev piav qhia: Sau cov ntaub ntawv hlau rau ntawm frit, thiab ntxuav cov ntaub ntawv nrog dej txias me ntsis, thiab me ntsis ntawm ethanol kom tshem tawm cov dej, thiab tom qab ntawd cua qhuav. Ua haujlwm tiav.
Puas yog hlau filings magnetic?
Iron filings are me me shavings of a ferromagnetic material Ferromagnetic (rau lub hom phiaj ntawm nplooj ntawv no, tsawg kawg) txhais tau hais tias lawv yuav ua kom lawv tus kheej nrog cov hlau nplaum. Ua li ntawd, cov ntaub ntawv hlau yog ib txoj hauv kev zoo los tso saib cov hlau nplaum ntawm ib lossis ntau lub hlau nplaum.
Puas kov cov ntaub hlau tsis zoo?
Cov ntaub ntawv hlau tuaj yeem ua rau raug mob hnyav yog tias nws nkag mus rau hauv qhov muag, lub ntsws lossis nqos tau. Peb cov ntaub ntawv hlau tsis muaj pos thiab spikes thiab lawv yog feem ntau muaj kev nyab xeeb rau kov lossis tuav los ntawm tes liab qab.