Bernoulli's Principle.

(Bernoulli's principle story)

1)

*Bernoulli's Principle*states that the*pressure*of a fluid (liquid or gas)*decreases*at the region where the*speed*of fluid flow*increases.*

Relationship between speed of fluid flow and cross-sectional area.

**Volume of fluid =**

*A*1v1**entering per second**

**Volume of fluid**

**=**

*A2*v2**leaving per second**

**The fluid is incompressible, so**

*A*2v2 =*A*1v1

__v2__=*A*1**v1**

*A*2

2) To

*increase*the kinetic energy, force is required to do*work*while flowing through the narrow section of the pipe.

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