For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by____________________?
(A) Di, opt = 3 Q0.36 ρ0.18
(B) Di, opt = 3.9 Q0.45 ρ0.23
(C) Di, opt = 7.6 Q0.36 ρ0.9
(D) Di, opt = 3 Q0.36 ρ1.86 μ0.08
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by____________________?
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