
Principles of Fluid Mechanics Flashcard

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Science
•
10th Grade
•
Easy
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15 questions
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1.
FLASHCARD QUESTION
Front
What principle explains lift on airplane wings?
Back
Bernoulli’s Principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure. This principle explains how air moves faster over the top of an airplane wing, creating lift.
2.
FLASHCARD QUESTION
Front
Why do car brakes work?
Back
Pascal’s Principle states that when pressure is applied to a confined fluid, the pressure change occurs throughout the fluid. This principle is the basis for hydraulic brakes in cars.
3.
FLASHCARD QUESTION
Front
What happens to fluid speed when the cross-sectional area of a pipe decreases?
Back
According to the Continuity Equation, if the cross-sectional area decreases, the fluid speed must increase to maintain the same flow rate.
4.
FLASHCARD QUESTION
Front
Why is water faster in narrower stream sections?
Back
Velocity increases as area decreases due to the principle of conservation of mass, which states that the mass flow rate must remain constant.
5.
FLASHCARD QUESTION
Front
What happens to an airplane wing when air pressure is lower above it than below it?
Back
The wing will move upward due to the difference in pressure, as the higher pressure below pushes the wing up.
6.
FLASHCARD QUESTION
Front
Define Bernoulli’s Principle.
Back
Bernoulli’s Principle states that in a flowing fluid, an increase in velocity occurs simultaneously with a decrease in pressure or potential energy.
7.
FLASHCARD QUESTION
Front
What is Pascal’s Principle?
Back
Pascal’s Principle states that a change in pressure applied to an enclosed fluid is transmitted undiminished to all portions of the fluid and the walls of its container.
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