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Over an aircraft wing, which outcome decreases lift when airspeed achieves a critical value?

A)Boundary layer flow separates rapidly
B)Skin friction drag decreases linearly
C)Laminar flow fully reestablishes itself
D)Adverse pressure gradients become negligible

💡 Explanation

Flow separation occurs due to increased turbulence at high Reynolds numbers. The turbulent boundary layer's increased momentum exchange triggers flow separation because viscous forces can't sustain the attached profile. Therefore lift suddenly decreases, rather than increased as pressure gradients intensify.

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