Question: For low-speed (laminar) flow in a tube of radius ro, the velocity u takes the form u = B p/ (r2- r2) Where is viscosity

For low-speed (laminar) flow in a tube of radius ro, the velocity u takes the form
u = B Δp/μ (r2- r2)
Where μ is viscosity and Δp the pressure drop. What are the dimensions of B?

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