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1236_Physics ProblemsTechnical Physics

# 1236_Physics ProblemsTechnical Physics - Chapter 44 P44.22...

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Chapter 44 577 P44.22 (a) The first term overstates the importance of volume and the second term subtracts this overstatement. (b) For spherical volume 4 3 4 3 3 2 b g π π R R R = . For cubical volume R R R 3 2 6 6 = . The maximum binding energy or lowest state of energy is achieved by building “nearly” spherical nuclei. P44.23 (a) “Volume” term: E C A 1 1 15 7 56 879 = = = . MeV MeV a fa f . “Surface” term: E C A 2 2 2 3 2 3 17 8 56 260 = − = − = − . MeV MeV a fa f . “Coulomb” term: E C Z Z A 3 3 1 3 1 3 1 0 71 26 25 56 121 = − = − = − a f a f a fa f a f . MeV MeV . “Asymmetry” term: E C A Z A 4 4 2 2 2 23 6 56 52 56 6 74 = = − = − a f a f a f . . MeV MeV. E b = 491 MeV (b) E E b 1 179% = ; E E b 2 53 0% = − . , E E b 3 24 6% = − . ; E E b 4 1 37% = − . Section 44.4 Radioactivity P44.24 R R e e e t = = = = F H G I K J = 0 2 8 04 40 2 2 5 5 6 40 6 40 6 40 1 2 0 200 λ . . . . ln . . ln mCi mCi mCi mCi d d a f a f e j a f b ga f P44.25 dN dt N = − λ so λ = F H G I K J = × × = × 1 1 00 10 6 00 10 6 00 10 15 11 4 1 N dN dt . . . e je j s T 1 2 3 2 1 16 10 19 3 = = × = ln . . λ
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