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BERNOULLI'S PRINCIPLE
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Learning Objective: 3.6 Understanding Bernoulli’s principle

Learning Outcome:
A student is able to:
• State Bernoulli’s principle
• Carry out an experiment to show the effect of Bernoulli’s principle using a Venturi tube
• Explain that a resultant force exists due to a difference in fluid pressure
• Describe applications of Bernoulli’s principle
• Solve problems involving Bernoulli’s principle

Prior Knowledge and Skills
Students have knowledge of the resultant force and pressure.

Scientific Skills
Observing, inferring and predicting.

Thinking Skills
Attributing, comparing and contrasting, grouping and classifying.

Moral and Scientific Value
• Having an interest and curiosity towards the environment.
• Having critical and analytical thinking.
• Being flexible and open-minded.

Scientific Skills
Observing, inferring and predicting.

Thinking Skills
Attributing, comparing and contrasting, grouping and classifying.

Moral and Scientific Value
• Having an interest and curiosity towards the environment.
• Having critical and analytical thinking.
• Being flexible and open-minded.







Set Induction (5-10 minutes)
-Show a picture of an aeroplane
-Ask students why aeroplane can fly in the sky?

Content (30-35 minutes)
-Introduce to the students Bernoulli's principle.
-Split students in a group of 5 to carry out the activities.
-Ask students relate the activity with Bernoulli's principle.

Experiment (35-40 minutes)
-Students get into group to carry out the experiments.
-Jot down the observation.

Discussion (10-15 minutes)
-Discuss applications of Bernoulli’s principle.

Summary (5-10 minutes)
-Give summary and ask student to try complete the exercise given.







Thursday, August 20, 2009

Activity 4


Question:
Explain how the atomiser functions using Bernoulli's principle.

Answer:
When we press in the tube X. Atomiser is squeezed, fast moving air is forced out of it into the space at Y. Water is drawn from its container and sprayed out in fine droplets. The pressure at Z is same as the atmospheric pressure which is higher than pressure at Y.

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