At low Reynold's number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: P₀ = ρ/ρN³ D⁵ : Power number Re = ρ N D²/μ: Reynold's number N is the impeller rotational speed, and D is the impeller diameter.

At low Reynold's number, the power (P) required for agitating a fluid

1.	At low Reynold's number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: P₀ = ρ/ρN³ D⁵ : Power number Re = ρ N D²/μ: Reynold's number N is the impeller rotational speed, and D is the impeller diameter.
A.	P₀ ∝ Re^-1.0
B.	P₀ ∝ Re^0.0
C.	P₀ ∝ Re^0.5
D.	P₀ ∝ Re^1.0
Answer» C. P₀ ∝ Re^0.5

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