Which viscosity had the fastest flow rate?

Which viscosity had the fastest flow rate?

• A. 1
• B. 0.5
• C. 2
• D. 3

Answer: (A)

Flow rate through a tube under the same driving pressure and geometry depends on how easily the fluid can move, which is governed by viscosity. The lower the viscosity, the less internal friction opposes the flow, so the fluid moves faster. In the standard setup described by Poiseuille’s law, the flow rate Q is proportional to 1/μ (mu is viscosity) when ΔP, the tube radius, and the length are held constant. That means the fastest flow occurs for the fluid with the smallest viscosity among the tested cases. So the option that corresponds to the viscosity value producing the highest flow in the experiment is the fastest. The other values, being more viscous, resist flow more and thus yield slower rates. If the dataset shows a different viscosity giving the fastest flow, that would point to specific experimental conditions or non-Newtonian behavior, but the general rule remains: lower viscosity tends to mean faster flow under the same driving conditions.

Flow rate through a tube under the same driving pressure and geometry depends on how easily the fluid can move, which is governed by viscosity. The lower the viscosity, the less internal friction opposes the flow, so the fluid moves faster. In the standard setup described by Poiseuille’s law, the flow rate Q is proportional to 1/μ (mu is viscosity) when ΔP, the tube radius, and the length are held constant. That means the fastest flow occurs for the fluid with the smallest viscosity among the tested cases.

So the option that corresponds to the viscosity value producing the highest flow in the experiment is the fastest. The other values, being more viscous, resist flow more and thus yield slower rates. If the dataset shows a different viscosity giving the fastest flow, that would point to specific experimental conditions or non-Newtonian behavior, but the general rule remains: lower viscosity tends to mean faster flow under the same driving conditions.