An orifice meter is used to measure the rate of flow of a fluid in pipes. The flow rate is...

An orifice meter is used to measure the rate of flow of a fluid in pipes. The flow rate is related to the pressure drop by the following equation:

where u = fluid velocity

Δp =pressure drop (force per unit area)

ρ = density of the flowing fluid

c = constant

What are the units of c in the SI system of units?