p43_060 - 60(a The rate of heat production is dE dt 3 i=1 =...

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60. (a) The rate of heat production is dE dt = 3 X i =1 R i Q i = 3 X i =1 λ 1 N i Q i = 3 X i =1 Ã ln 2 T 1 / 2 i ! (1 . 00 kg) f i m i Q i = (1 . 00 kg)(ln 2)(1 . 60 × 10 13 J / MeV) (3 . 15 × 10 7 s / y)(1 . 661 × 10 27 kg / u) · (4 × 10 6 )(51 . 7MeV) (238 u)(4 . 47 × 10 9 y) + (13 × 10 6 )(42 . 7MeV) (232 u)(1 . 41 × 10 10 y) + (4 × 10 6 )(1 . 31 MeV) (40 u)(1 . 28 × 10 9 y) ¸ =1 . 0 × 10 9 W . (b) The contribution to heating, due to radioactivity, is P
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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