1. Properties of Fluids

2. 1. Definition of Buoyancy

3. 2. Buoyancy
A fluid, liquid or gas, that exerts an upward force on an object immersed in it.
If buoyant force is equal to or greater than the object’s weight; object floats.
If buoyant force is less than object’s weight, the object will sink.

4. 3.Archimedes’ Principle
The buoyant force on an object is equal to the weight of the fluid displaced by the object.
If you place an object in water, it will displace the water and begin to sink.
(a) when the weight of the water displaced equals the object’s weight, the object will float
(b) if the weight of the water displace is less than the weight of the object, the object sinks

5. 4.Archimedes’ Principle

6. 5. Density Recall, density is the mass per unit volume.
An object will float if its density is less than the density of the fluid it is placed in.

7. 6. Pascal’s Principle Pressure is force exerted per unit area
Example: when you squeeze one end of a toothpaste tube, toothpaste expands out the other end
(Problems)

8. Pascal’s

9. 7. Bernoulli’s Principle
What is it? Bernoulli's Principle is a law of physics that has to do with gasses (such as air)
and liquids (like water). It states that when the velocity (speed) of a gas or liquid
is increased, its pressure becomes lower. Give me an example! When air rushes over the curved top of an aircraft wing, it goes faster than
when it passes over the flat bottom of the wing. Therefore, the pressure
or force of the air pressing down on the top of the wing becomes less than
the force of the air pressing up on the bottom of the wing. The result is lift,
one of the Four Forces of Flight.

10. 7. Bernoulli’s Principle
Pressure decreases as velocity increases
Pressure increases as velocity decreases

11. 8. Viscosity Resistance to flow by a fluid
Low viscosity = flows easily
High viscosity = flows slowly
Effected by structure (high viscosity..low flow…if particles do not pull other particles into motion) and temperature (heated…flow easily…low viscosity)