Which of the following quantities is dimensionless?
Correct Answer: Reynolds number
- Step 1: Understand what 'dimensionless' means. A dimensionless quantity has no units and is just a pure number.
- Step 2: Identify the Reynolds number. It is a number used in fluid mechanics.
- Step 3: Know that the Reynolds number is calculated by taking the ratio of two types of forces: inertial forces and viscous forces.
- Step 4: Realize that when you take a ratio of two forces, the units cancel out, leaving you with a pure number.
- Step 5: Conclude that since the Reynolds number has no units, it is dimensionless.
No concepts available.
