A liquid flows through a tube of non-uniform area of cross- section, the ratio of velocities of liquid A to B is:
Correct answer: B. a2/a1
- A. a1/a2
- B. a2/a1
- C. √a2/√a1
- D. √a1/√a2
Explanation
Using the continuity equation for incompressible flow:A₁v₁ = A₂v₂Rewriting for the velocity ratio:v₁ / v₂ = A₂ / A₁ Thus, the correct choice is option B.
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Fluid flow is described through speed, pressure and density, including steady flow and the equation of continuity for conserving mass. Bernoulli's equation relates pressure, speed and height, while fluid drag and terminal velocity explain why a falling object eventually moves at constant speed when drag balances its weight.
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