p45_033 - 33. (a) Letting v (r) = Hr ve = 2GM/r, we get...

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33. (a) Letting v ( r )= Hr v e = p 2 GM/r ,weget M/r 3 H 2 / 2 G .Thu s , ρ = M 4 πr 3 / 3 = 3 4 π M r 3 3 H 2 8 πG . (b) The density being expressed in H-atoms/m 3 is equivalent to expressing it in terms of ρ 0 = m H / m 3 = 1 . 67 × 10 27 kg / m 3 .Thu s , ρ = 3 H 2 8 πGρ 0 ³ Hatoms / m 3 ´ = 3(0 .
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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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