For a fluid rotating at constant angular velocity about vertical axis as a rigid body, the pressure intensity varies as the___________________?
Correct answer: C. Square of the radial distance
- A. Inverse of the radial distance
- B. Radial distance linearly
- C. Square of the radial distance
- D. Elevation along vertical direction
Explanation
For rigid-body rotation, radial force balance gives dp/dr = rho omega²r. Integrating with radius therefore makes pressure vary with the square of radial distance, at a fixed elevation.
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