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Flashcards on Buoyancy and Archimedes' Principle
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What is buoyancy?
The upward force exerted by a fluid on an object submerged in or floating on it.
What is Archimedes' Principle?
An object submerged in a fluid experiences an upward buoyant force equal in magnitude to the weight of the fluid it displaces.
What factors affect the buoyant force on an object?
The density of the fluid and the volume of the fluid displaced by the object.
What is the formula for calculating buoyant force?
Buoyant force = density of the fluid × acceleration due to gravity × volume of the fluid displaced
What is the principle behind why objects float?
If the buoyant force is greater than the weight of the object, it will float.
What is the principle behind why objects sink?
If the weight of the object is greater than the buoyant force, it will sink.
How does the density of an object affect its buoyancy?
Objects with lower density than the fluid will float, while objects with higher density will sink.
What is the unit of density?
The unit of density is kilograms per cubic meter (kg/m³).
What is the principle of flotation?
A floating object displaces a weight of fluid equal to its own weight.
What is an example of an application of buoyancy in everyday life?
The floating of boats and ships.
What is an example of an application of Archimedes' Principle in everyday life?
The use of hydrometers to measure the density of liquids.
What happens to the buoyant force on an object as it is submerged deeper in a fluid?
The buoyant force remains the same.
What is the relationship between the density of an object and its volume?
The density of an object is the ratio of its mass to its volume.
What is the principle behind hot air balloons?
Hot air is less dense than cold air, causing the balloon to float.
How does the shape of an object affect its buoyancy?
Objects with a greater volume for the same mass have a greater buoyant force and are more likely to float.
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Test Your Knowledge
What is the upward force exerted by a fluid on an object submerged in or floating on it called?
Gravity
Inertia
Buoyancy
Friction
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According to Archimedes' Principle, the buoyant force on an object is equal to:
The weight of the object
The weight of the fluid it displaces
The density of the fluid
The volume of the object
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What happens to the buoyant force on an object as it is submerged deeper in a fluid?
Remains the same
Increases
Decreases
Depends on the density of the object
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Which of the following objects is most likely to float in water?
A metal coin
A wooden block
A plastic bottle
A glass marble
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What is the unit of density?
Kilograms
Meters
Kilograms per cubic meter
Cubic meters per kilogram
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Which principle explains why hot air balloons float?
Newton's First Law
Law of Conservation of Energy
Law of Inertia
Archimedes' Principle
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What is the principle behind why objects sink?
The force of gravity
The weight of the object is greater than the buoyant force
The density of the object is greater than the density of the fluid
The volume of the object is greater than the volume of the fluid it displaces
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Which of the following objects is most likely to sink in water?
A metal anchor
A plastic toy
A styrofoam cup
An inflated beach ball
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When an object displaces a weight of fluid equal to its own weight, it is an example of:
Buoyancy
Principle of Flotation
Archimedes' Principle
Law of Conservation of Mass
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In order for an object to float, the buoyant force exerted on it should be:
Greater than its weight
Equal to its weight
Less than its weight
Depends on the density of the object
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