Final answer:
The Hagen-Poiseuille equation, also known as Poiseuille's law, can be used to verify the 19.0% decrease in laminar flow due to a 5.00% decrease in radius.
Step-by-step explanation:
The correct answer is (d) Hagen-Poiseuille equation.
Poiseuille's law, also known as the Hagen-Poiseuille equation, describes the laminar flow through a tube. According to this law, the flow rate (Q) is directly proportional to the pressure difference (ΔP), and inversely proportional to the length of the tube (L), viscosity of the fluid (η), and the fourth power of the radius (r).
If a 5.00% decrease in radius causes a 19.0% decrease in laminar flow, it can be verified using the Hagen-Poiseuille equation. By keeping all other factors constant, the decrease in radius will result in a decrease in flow rate according to the equation.