1232_Physics ProblemsTechnical Physics

# 1232_Physics ProblemsTechnical Physics - Chapter 44 P44.6...

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Chapter 44 573 P44.6 It must start with kinetic energy equal to KU kqQ r if e f == . Here r f stands for the sum of the radii of the 2 4 He and 79 197 Au nuclei, computed as rr A r A f =+= × + = × −− 0 1 13 0 2 15 1 20 10 4 197 8 89 10 .. m m ej e j . Thus, ×⋅ × × = 8 9 91 0 27 6 01 0 889 10 409 10 256 9 2 15 12 . Nm C C m J M e V 22 af a f . P44.7 (a) rrA × = × 0 15 1 2 0 4 1 9 0 m (b) × = × 0 15 120 10 238 744 10 m P44.8 From = 0 , the radius of uranium is U = 0 238 a f . Thus, if = 1 2 U then rA r 0 0 1 2 238 = a f from which A = 30 . P44.9 The number of nucleons in a star of two solar masses is A = × × 2 1 99 10 167 10 238 10 30 27 57 . . . kg kg nucleon nucleons . Therefore × × = 0 1 3 15 57 1 20 10 2 38 10 16 0 . k m e j . P44.10 Vr = × 4 3 4 3 0 021 5 4 16 10 4 3 5 ππ m 3 bg We take the nuclear density from Example 44.2 mV × × = × ρ 2 3 10 4 16 10 9 57 10 17 5 12 . kg m m kg 33 e j and FG mm r × 12 2 11 12 2 2 667 10 957 10 100 . . . Nm kg kg m a f F 611 10 15 . N toward the other ball. P44.11 The stable nuclei that correspond to magic numbers are:
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## This note was uploaded on 12/15/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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