The equation of continuity is obtained by applying in the law of conservation of_____________?
Correct answer: A. Mass
- A. Mass
- B. Energy
- C. Momentum
- D. All
Explanation
The continuity equation comes from conservation of mass: the mass entering a pipe per second equals the mass leaving it per second. For incompressible flow this becomes A1V1 = A2V2, so students who select energy are confusing continuity with Bernoulli's equation.
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About Equation of Continuity
The equation of continuity expresses conservation of mass in fluid flow. For steady incompressible flow, Av remains constant, so fluid speed increases when the cross-sectional area decreases; for compressible flow, ρAv is constant. This relation describes flow rate and area-speed changes without including pressure effects from Bernoulli’s equation.
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