Applications of Bernoulli Theorem

Which of the followings are Applications of Bernoulli’s Theorem:

Blowing off roofs during wind storm
Aerofoil lift
Bunsen burner
Venturimeter

1.1 only

2.2 only
3.1, 2 only

4. 1, 2 , 3, 4

EXPLANATION

✅ 1. Blowing off roofs during wind storm

In a storm, wind speed over the roof increases → air pressure decreases on top.
Inside the house, pressure is relatively higher, pushing the roof upward.
This is explained by Bernoulli’s principle.
✔️ Yes, it’s an application.

✅ 2. Aerofoil lift (Airplane wing)

Air moves faster over the curved upper surface than below the wing.
Lower pressure above, higher pressure below → generates lift.
✔️ Classic application of Bernoulli’s Theorem.

✅ 3. Bunsen burner

Gas flows at high speed through a nozzle → pressure decreases.
This low pressure draws in air through side holes → helps mixing of air and gas.
✔️ Yes, Bernoulli’s principle explains this.

✅ 4. Venturimeter

Device used to measure flow rate of liquids in a pipe.
Works based on pressure difference created by fluid speed change at constrictions.
✔️ Direct application of Bernoulli’s Theorem.