Write the following numbers in powers of 10 notation: (a) 1.156, (b) 21.8, (c) 0.0068, (d) 328.65, (e) 0.219, and ( ) 444

Week6Introductiontomagnetism Magnetism Magnetscanexertastrongattractiveforceacrossemptyspaceon some,butnotallmaterials (mostcommonlyironcontainingmaterials) Permanentmagnetscaneitherattractorrepeleachother, dependingonhowtheyareoriented Magneticpoles(charges) Magneticforcecomesfromthemagnetic"charge",calledpoles Similartoelectricforcecomingfromelectriccharges Twokindsofmagneticpoles,called"north"(N)and"south"(S) Similartotwokindsofelectriccharge,called+& - Likepolesfeelarepulsiveforcebetweeneachother NrepelsN,SrepelsS Unlikepolesfeelanattractiveforce NattractsS Nomagneticmonopoles TherearenoisolatedNorSmagneticpoles(monopoles_ Unlikeelectriccharges MagneticpolsalwayscomeinN -Spairscalleddipoles Similartoelectricdipoles Ifyoucutamagneticdipoleintwo,youendupwithtwomagnetic dipoles,nottwomonopoles Magneticfields Forceexertedon"testNpole"atanypointrinspacebyfixed magnetisvisualizedasmagneticfieldlines Similartoelectricfields MagneticfieldcalledtheB -fieldB® MagneticfieldlinespointawayformNpolesandtowardSpoles "testNpole"movesawayfromNandtowardsSpole Similarto+electrictestchargeinEfield Magneticfieldsarealwaysdipolefields JustlikeEfieldofelectr