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Properties of Fluids

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Properties of Fluids Fluids and Buoyancy What is a fluid? A fluid can be a liquid or a gas. Buoyancy is the ability of a fluid to exert an upward of force on an ... – PowerPoint PPT presentation

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Title: Properties of Fluids


1
Properties of Fluids
2
Fluids and Buoyancy
  • What is a fluid?
  • A fluid can be a liquid or a gas.
  • Buoyancy is the ability of a fluid to exert an
    upward of force on an object immersed in it.
  • If the buoyant force is equal to the objects
    weight, it will float.
  • If the buoyant force is less than the weight, the
    object will sink.

3
Archimedes Principle
  • Archimedes was a Greek mathematician who lived in
    the 3rd century B.C.
  • He found that the buoyant force on an object is
    equal to the weight of the fluid displaced by the
    object.

4
Density
  • Would a steel block that was the same size as a
    wood block float in water?
  • No, because they have different densities.
  • If two objects are the same size, the heaviest
    one would be more dense.
  • Density mass/volume
  • D m/v
  • The unit is grams per cubic centimeter or g/cm3.

5
Pascals Principle
  • Blaise Pascal (1623-1662) was a French scientist
    who discovered a useful property of fluids.
  • He found that pressure applied to a fluid is
    transmitted throughout the fluid.
  • Pressure is force exerted per unit area.

6
Bernoullis Principle
  • Daniel Bernoulli (1700-1782) was a Swiss
    scientist who studied the properties of moving
    fluids such as water and air.
  • He found that as velocity of a fluid increases,
    the pressure exerted by the fluid decreases.

7
Viscosity
  • Another property of fluids is the tendency to
    flow.
  • A resistance to flow by a fluid is called
    viscosity.
  • Water would have a low viscosity, syrup would
    have a high viscosity.
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