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Which flow change increases drag coefficient downstream because a ship exceeds critical speed?

A)Increased skin friction resistance
B)Amplified hydrostatic pressure gradient
C)Advancement toward cavitation inception
D)Transition towards turbulent boundary layers

💡 Explanation

The transition increases drag because exceeding critical Reynolds Number promotes boundary layer transition to turbulence. A turbulent boundary layer has higher skin friction and pressure drag, therefore total drag rises dramatically due to turbulence, rather than laminar effects.

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