1200_Physics ProblemsTechnical Physics

1200_Physics ProblemsTechnical Physics - Chapter 42 P42.68...

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Chapter 42 541 P42.68 (a) The configuration we may model as SN NS has higher energy than SN . The higher energy state has antiparallel magnetic moments, so it has parallel spins of the oppositely charged particles. (b) E hc == × = λ µ 942 10 589 25 .. J e V (c) ∆∆ Et = 2 so E ×⋅ × × F H G I K J 1055 10 316 10 100 104 10 34 7 19 30 . . . . Js 210 yr syr eV 1.60 10 J eV 7 ej e j P42.69 P r a ed r z e d z ra a z zz 41 2 2 0 3 2 250 2 500 0 0 where z r a 2 0 Pz z e e z =− + + + + + = F H G I K J = 1 2 22 1 2 0 1 2 25 0 10 0 2 00 37 2 0 006 74 0 125 2 5 af bg . . . . P42.70 (a) One molecule’s share of volume Al: V × F H G I K J × F H G I K J mass per molecule density gmo l molecules mol m g m 3 3 27 0 602 10 100 10 270 166 10 23 6 29 . . . . . V 3 10 1 255 10 −− . m ~ 1 0 n m . U: V = × F H G I K J × F H G I K J 238 18 9 209 10 6 29 g 6.02 10 molecules m g m 23 3 3 . . . V 3 10 1 276 10 10 .~ m n m . (b) The outermost electron in any atom sees the nuclear charge screened by all the electrons
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