833_Physics ProblemsTechnical Physics

833_Physics ProblemsTechnical Physics - Chapter 29 P29.39 e...

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Chapter 29 173 P29.39 r mv qB = so m rqB v == ×× × −− 7 94 10 1 60 10 1 80 460 10 31 9 5 .. . . m C T ms ej e j af m × F H G I K J = 497 10 299 27 27 kg 1 u 1.66 10 kg u The particle is singly ionized: either a tritium ion, 1 3 H + , or a helium ion, 2 3 He + . Section 29.5 Applications Involving Charged Particles Moving in a Magnetic Field P29.40 FF Be = so qvB qE = where v K m = 2 and K is kinetic energy of the electron. Ev B K m B = × × = 2 2750 160 10 911 10 0 015 0 244 19 31 bg . . . k V m P29.41 Km v q V 1 2 2 so v qV m = 2 Fv B B q mv r = 2 r mv qB m q qVm BB mV q = 2 1 2 ∆∆ (a) r 238 27 19 2 2238 166 10 2000 160 10 1 120 828 10 828 = × F H G I K J = . . . c m (b) r 235 823 = c m r r m m 238
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