Fluids Density and Buoyancy Liquid Density Facts Fluid

Fluids Density and Buoyancy

Liquid Density Facts: • Fluid density usually decreases as temperature increases. – Kinetic energy increases the motion of the molecules or atoms – Increased motion usually means the molecules take up more space.

How does water differ from other liquids when it comes to density? • When frozen water molecules have large amounts of air space. • Water is less dense in its solid state than in its liquid state because it takes up less space as a liquid.

What is Buoyancy? • Buoyancy - is the upward force exerted by a fluid (gas or liquid) on an object.

What is Archimedes Principle? • Archimedes principle – the buoyant force of a fluid is equal to the weight of the liquid displaced by the object. • This principal can help us determine if an object will sink or float

Buoyant force • If the buoyant force is equal to or greater than the weight of an object then the object will float. • If the buoyant force is less than the weight of the object will sink.

How can a steel boat float? • When the weight of the water displaced by the boat is equal to or greater than the weight of the boat then the boat will float.

Buoyancy is a property of gases as well as liquids. • How can a helium balloon float? • Helium is less dense it therefore weighs less than air. • How does the specific gravity of Helium compare to specific gravity of air? • The specific gravity of Helium is less than air.

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