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MDCAT Physics QUESTION #4407
Question 1
In a pipe of varying cross-section, as fluid enters the narrower region, it exhibits:
  • High velocity, high pressure
  • High velocity, low pressure✔️
  • Low velocity, high pressure
  • Low velocity, low pressure
Correct Answer Explanation
By Bernoulli's principle: $P + \dfrac{1}{2}\rho v^2 + \rho gh = $ constant. In the narrower section, velocity increases (continuity equation), so pressure must decrease. Result: high velocity, low pressure.