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Which outcome occurs when a viscous liquid's flow velocity exceeds a threshold using the Reynolds equation?

A)Onset of turbulent flow regime
B)Laminar flow remains unaffected
C)Decreased shear stress on surfaces
D)Fluid density reduces significantly

💡 Explanation

Turbulent flow emerges due to increased inertial forces over viscous forces, initiating the transition through the Reynolds number formula. Therefore, turbulence occurs, rather than laminar flow persisting or density greatly reducing, because viscosity effects don't prevent instability.

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