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Which outcome during high-speed flight invalidates Bernoulli's equation?

A)Temperature increase through boundary layer compression
B)Decreased pressure affecting structural integrity
C)Increased fuel efficiency nearing Mach 1
D)Elevated air density influencing lift coefficient

💡 Explanation

Significant kinetic energy converted leads to compressibility effects; therefore, large density changes undermine Bernoulli's assumption that density remains constant, because the isentropic assumption is weakened rather than the pressure directly impacting structure or lift.

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