Physics+Ch3+Review

=VOCABULARY REVIEW: []=

3-1 Fluid Pressure

 * =Fluid Pressure is the force per unit area exerted by a fluid.=
 * =The pressure a fluid exerts is due to the face that the fluid is masde up of prticles that have mass and motion.=
 * =All liquids and gases are fluids. All fluids exert pressure equally in all directions.=
 * =Fluids can be pushed from areas of high pressure to areas of lower pressure.=

Air Pressure Interactive website: []
= 3-2 Hydraulic Devices =
 * =**Pressure applied to a fluid is trasmitted equally in all directions through the fluid.**=
 * =In hydraulic devices, a small force acting on a small area is multiplied into larger force acting on a larger area.=

More information on how hydraulic systems work: Hydraulic and Pneumatic Video Part 1: [] Hydraulic and Pneumatic Video Part 2: []

Hydraulic Suspensions on cars: media type="custom" key="7463827"

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Examples of hydraulic devices...

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= 3-3 Pressure and Gravity =
 * =As a result of gravity, the pressure a liquid exert increases as the depth increases.=
 * =Air pressure decreases as altitude increases.=

Facts about pressure and ocean depths: []

Bends info: []

Bends info: []

= 3-4 Buoyancy =
 * =Buoyancy is the phenomenon caused by the upward force of fluid pressure.=
 * =The buoyant force on an ovbject is equal to the weight of the fluid displaced by the object. This relationship is called Archimeded' Principle.=
 * =An object floats in a fluid when the buoyant force on the object is greater than or equal to the weight if the object.=
 * =Density is ther ration of the mass of an object to its volume (D=M/V).=
 * =An object will floar in a fluid if its density is less than the density of the fluid.=

BUOYANT FORCE

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PIRATES OF THE CARRIBEAN....MYTHBUSTERS media type="custom" key="7396197"

EUREKA....

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Why does a rubber duck float? []

Interactive Buoyancy Lab: []

Archimedes' Principle Interactive Website: []

Buoyancy brainteaser: []

= 3-5 Fluids in Motion =
 * =Bernoulli's Principle states that pressure in a moving stream of fluid is less than the pressure in the surrounding fluid.=
 * =The faster a fluid moves the less pressure it exerts.=

The very handsome Daniel Bernoulli

Bernoulli Animation: []

Bernoulli and Airfoil

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CHECK OUT THESE INTERACTIVE SITES:

= Buoyancy: [] =

= Density: [] =