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# 1) Given that ρv = 12ρ nC/m3 for 1 < ρ < 2 (and zero otherwise),...

1) Given that ρv = 12ρ nC/m3 for 1 < ρ < 2 (and zero otherwise), prove that:

a) D = 0                      for ρ < 1, and

b) Dρ = 8 (ρ3-1) / 2ρ   for 1 < ρ < 2

c) Dρ = 28/ρ                for ρ > 2.

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