Practice question · Sort into groups
Sort each phenomenon as an example of Bernoulli effect or Continuity alone.
Groups: Bernoulli effect · Continuity (mass conservation)
- Spray atomiser uses fast airflow to reduce pressure
- River narrows and current increases
- Water speeds up in a narrowing pipe
- Fire hose outlet has higher speed than the intake
- Venturi meter measuring flow speed
- Airplane wing generating lift
Hints
- One principle links speed to pressure, the other to cross-section.
- If no pressure change is involved, only the second applies.
Show the answer
Bernoulli effect: Airplane wing generating lift, Venturi meter measuring flow speed, Spray atomiser uses fast airflow to reduce pressure
Continuity (mass conservation): Water speeds up in a narrowing pipe, Fire hose outlet has higher speed than the intake, River narrows and current increases
Why
Bernoulli relates speed to pressure; continuity relates speed to cross-sectional area.
Practise Fluid Dynamics: Continuity and Bernoulli's Equation
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