An incompressible fluid of density ρ is flowing from left to right through the tubes
shown below. The speed entering on the left is v0, and the
diameter on the left is n1. The diameter on the right is
n2. If the difference in pressure from the left to the
right side is Δ P = P1 - P2 = n3 ρ
v02/2, what is n3? Note that n1
and n2 have the same units of length, and that n3 is unitless.
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