Answer:
A. Drinking a liquid through a straw
Explanation:
The Bernoulli effect, or Bernoulli's principle, explains how an increase in the speed of a fluid (such as air) results in a decrease in pressure. This principle can be observed in various scenarios involving fluid dynamics.
Let's talk about each option:
Option A: Drinking a liquid through a straw
- This is NOT an example of the Bernoulli effect. Drinking through a straw primarily involves creating a lower pressure inside your mouth by sucking, which allows atmospheric pressure to push the liquid up the straw. This process does not involve the principle that an increase in fluid speed leads to a decrease in pressure.
Option B: A roof coming off a house in a tornado
- This is an example of the Bernoulli effect. High-speed winds over the roof create lower pressure above the roof compared to the inside of the house, which can cause the roof to lift off.
Option C: A piece of paper held in front of your lips rising as you blow air over it
- This is an example of the Bernoulli effect. Blowing air over the top of the paper reduces the pressure above it, causing the higher pressure below to lift the paper.
Option D: A tarp covering a truck lifting up as the truck drives
- This is an example of the Bernoulli effect. As the truck moves, the air speed over the tarp increases, decreasing the pressure and causing the tarp to lift.
Option E: Smoke going up a chimney faster when there is a wind outside
- This is an example of the Bernoulli effect. Wind blowing over the top of the chimney reduces the pressure there, helping to draw the smoke up the chimney faster.
Thus, the correct option is (A) Drinking a liquid through a straw.
