Answer:
In SI units, pressure is measured in pascals (Pa), and so the units would also be pascals (Pa).
In other systems of units, such as the US customary system, pressure is often measured in pounds per square inch (psi), and so the units of P would be pounds per square inch (psi).
Step-by-step explanation:
Hagen-Poiseuille velocity profile
used for modeling blood flow through arteries and veins to understand blood pressure
as well as the flow of air in the lungs
B or P is the pressure difference driving the flow
Hagen-Poiseuille velocity profile can be expressed as:
v(r) = (P/4µ)(R^2 - r^2)
where v(r) is the velocity at a distance r from the center of the pipe, P is the pressure difference driving the flow, µ is the fluid viscosity, and R is the radius of the pipe
viscosity means thickness of the liquid
chatGPT