**Unformatted text preview: **( 29 ( 29 ( 29 . 2 3 2 3 2 3 2 L πR M L πR M L Cx ρ = = = The denominator is just the total volume , V so , 3 V M = or three times the average density, . V M So the average density is one-third the density at the L x = end of the rod....

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- average density, volume element dV, Cx R dx, 3M 3M