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According to Bernoulli's equation, where the velocity of a flow increases, the static pressure

  • A.Becomes equal to the total pressure
  • B.Decreases
  • C.Increases in the same proportion
  • D.Remains exactly unchanged

Answer: B

The sum of static and dynamic pressure is constant along a streamline, so any gain in speed must be paid for by a fall in static pressure. This inverse relationship is the basis of the simplest explanation of how an airfoil generates lift.

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