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Questions and Answers
What is the primary factor that determines whether an object will sink or float?
What is the formula for buoyant force?
What is the purpose of Archimedes' principle?
What is the density of water?
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What is the main reason why a large ship made of steel can float in the ocean?
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What is the result of gravity pulling downward on an object?
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What happens to fluid pressure as the depth of an object increases?
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What is the relationship between the buoyant force on an object and the amount of fluid displaced?
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What causes the decrease in fluid pressure as altitude increases in the atmosphere?
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What is the term for the upward force a fluid places on an object?
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What is the relationship between the volume of the water displaced and the volume of the boat?
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What is the purpose of rearranging the density equation to solve for volume?
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What is the buoyant force equation?
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Why does the hot air balloon float in the air?
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What is the value of the acceleration due to gravity on Earth?
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Study Notes
What is Buoyancy?
- Buoyancy is the ability of an object to float when submerged in a fluid (liquid or gas)
- It is encountered anytime an object is submerged into a fluid
- The phenomenon is known as buoyant force
Fluid Pressure
- Fluid pressure is proportional to the depth of an object
- The deeper an object, the greater the pressure since there are more particles above it
- Gravity plays a key role in fluid pressure because gravity is pulling on these particles
- Fluid pressure is due to the weight of the fluid above an object
Buoyant Force
- The upward force a fluid places on an object is known as buoyant force
- The buoyant force an object experiences is equal to the amount of fluid that the object displaces
- The buoyant force is equal to the weight of the fluid that the object has displaced
- The buoyant force acts in the upward direction
Archimedes' Principle
- Archimedes' principle states that an object that is either partially or completely immersed in a fluid is subject to an upward force
- The upward force is equal to the weight of the fluid that the object has displaced
- The principle is also known as the law of buoyancy
Density and Volume
- Density is a combination of mass and volume
- Density can be determined by dividing the mass of an object by the volume of the object
- Volume is the space an object takes up
- Mass is a measure of the amount of matter in an object
Buoyant Force Equation
- The buoyant force equation is: Buoyant Force = d x V x g
- Where d is the density of the fluid, V is the volume of the fluid displaced, and g is the acceleration due to gravity
Buoyancy Examples
- A boat floating on water experiences an upward buoyant force from the water
- The buoyant force is equal to the weight of the water displaced by the boat
- A hot air balloon in the atmosphere is suspended by the buoyant force of air
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Description
Understand how objects float or sink in fluids, including the concept of buoyancy and buoyant force. Learn why a large ship floats in the ocean, but a small pebble sinks.
