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| Q. |
For hydrodynamically rough boundary the friction coefficient |
| A. | Depends on velocity and relative roughness |
| B. | Varies with Reynold's number |
| C. | Depends on Reynolds number, pressure gradient and relative roughness |
| D. | Remains constant |
| E. | Depends on relative roughness |
| Answer» E. Depends on relative roughness | |
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