Fluids at Rest and in Motion
Flashcard
•
Science
•
9th - 12th Grade
•
Hard
Barbara White
FREE Resource
Student preview
14 questions
Show all answers
1.
FLASHCARD QUESTION
Front
Fluid Noun
[floo-id]
Back
Fluid
A substance, such as a liquid or gas, that has no fixed shape and yields easily to external pressure.
Example: A fluid is a substance, like water, that has no fixed shape and can flow to take the shape of the container it is in.
2.
FLASHCARD QUESTION
Front
Pressure Noun
[presh-er]
Back
Pressure
The amount of force exerted per unit of area; in a fluid, it is transmitted in all directions.
Example: The weight of the column of air above creates atmospheric pressure; there is less air and lower pressure at high altitudes than at sea level.
3.
FLASHCARD QUESTION
Front
Density Noun
[den-si-tee]
Back
Density
The mass of a substance contained within a specific unit of volume, representing its degree of compactness.
Example: This image shows that a less dense pumice stone floats in water, while a more dense obsidian stone sinks, demonstrating the concept of density.
4.
FLASHCARD QUESTION
Front
Pascal's Principle Noun
[pas-kals prin-suh-puhl]
Back
Pascal's Principle
The principle stating that a change in pressure at any point in a confined fluid is transferred undiminished throughout the fluid.
Example: Applying a force to a small piston in an enclosed fluid creates pressure that is transmitted to a larger piston, generating a larger output force.
5.
FLASHCARD QUESTION
Front
Hydraulic System Noun
[hy-draw-lik sis-tuhm]
Back
Hydraulic System
A machine that uses a confined fluid to transmit and multiply force, based on Pascal's principle.
Example: Applying a small force (F1) to a small piston (Area A1) creates pressure in the fluid, which generates a larger output force (F2) on a larger piston (Area A2).
6.
FLASHCARD QUESTION
Front
Buoyant Force Noun
[boi-uhnt fors]
Back
Buoyant Force
The upward force that a fluid exerts on an object immersed in it, caused by the increase in pressure with depth.
Example: This illustration shows a boat floating because the upward buoyant force from the water is balancing the downward force of the boat's weight.
7.
FLASHCARD QUESTION
Front
Archimedes' Principle Noun
[ar-kuh-mee-deez prin-suh-puhl]
Back
Archimedes' Principle
The principle that the buoyant force on an object is equal to the weight of the fluid displaced by the object.
Example: An object submerged in water experiences an upward buoyant force equal to the weight of the water it displaces (5kg - 3kg = 2kg).
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