Water flows through a horizontal pipe with cross-sectional area at speed . At a constriction, area is . What is the pressure drop ? (density )
Answer and explanation
Correct answer: C.
- Step 1: Apply continuity equation: .
- Step 2: Apply Bernoulli's equation for horizontal flow: .
- Step 3: Substitute values: .
Answer
7,500 Pa.
Why not the others: '' forgets factor of ; '' uses incorrect velocity square; '' multiplies by directly.
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