NRm=433πρ. We substitute this into µtotal= Nto obtain 133totaltotal34.34mRRmρµ⎛⎞π=⇒=⎜⎟π⎝⎠The mass of an iron atom is m==×=×−−5656166 109 30 102726uukgukg.bgch..Therefore, R=××LNMMOQPP−−3 9 30 108 0 104211018 102622235..kgJ Tkg mJ Tm.3chchchchπ14 103(b) The volume of the sphere is VRs×=×44182 102 53 1035316π3π3mm3and the volume of the Earth is Ve=×46 37 10108 106321π3,3so the fraction of the Earth’s volume that is occupied by the sphere is 253 10108 1023 1016215..××−mm3353. (a) If the magnetization of the sphere is saturated, the total dipole moment is
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.