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← ScienceWhich outcome results when viscosity drops sharply inside hydroelectric penstock?
A)Increased Reynolds number, turbulence ensues✓
B)Decreased pressure due to flow change
C)Elevated kinetic energy near the walls
D)Reduced flow velocity at centerline
💡 Explanation
An abrupt drop in viscosity elevates the Reynolds number, triggering turbulence because instability grows when inertial forces dominate viscous forces. Therefore, turbulence increases, rather than pressure changes or energy shifts, specifically because we're examining the triggering effect of viscous changes on flow Reynolds number.
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