# Properties of Fluids - PowerPoint PPT Presentation

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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.