FLUIDS
and THEIR PROPERTIES 
|
1)
What Are Fluids? (The photo above demonstrates turbulent
flow of fluids.)
|
|
| |
2)
What is Archemedes Principle?
|
3)
How Do Fluids Exert Force and Pressure?
|
|
| |
4)
What is Bernoulli's Principle?
|
|
| |
PROPERTIES
OF FLUIDS
|
A
fluid is anything that can flow-- which usually means either a gas or
a liquid! Fluids are very much an important part of our everyday
lives from the air that we breathe to the water we drink. In fact, the
blood (a fluid) that flows through our viens gives us life.
When
external forces act on a fluid, the fluid flows until it takes on the
shape of the container. Gases will usually occupy the entire cotainer
whereas liquids will occupy a volume of the container equal to the volume
o the liquid.On our planet Earth, gravity is one of the primary
forces acting on fluids. Fluids may flow in laminar (smooth) flow or turbulent
flow (see picture at the top of this web site).
|
ARCHEMEDES
PRINCIPLE
|
Whenever
an object of volume V is partily or completely submerged in a fluid (gas
or liquid) a buoyancy force from the fluid acts on the object.
That buoyancy force is directed upward against gravity and
equals the weight of the fluid that is displaced or pushed aside
by the object. Buoyancy Force =
r fluid x g x volume dispalced fluid
|
PRESSURE/
BUOYANCY FORCE
|
|
BERNOULLI'S
PRINCIPLE
|
Moving
fluids exert less pressure than fluids at rest. The faster the fluid moves,
the less pressure it exerts.
Examine
the following sites to explore Bernoulli's Principle:
DEMONSTRATE
UNDERSTANDING:
1.
Give three everyday examples where you might see Bernoulli's Principle.
2.
Explain how the Bernoulli Animation illustrates the concept
3.
Solve the AP problem or alternate problem given to you by your teacher.
|
