Topic 5 Fluid Pressure Flashcards

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1
Q

What are fluids

A

Substances that can flow because their particles are able to move around

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2
Q

What do particles do as they move about

A

Collide with surfaces and other particles

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3
Q

What do particles do when they collide with a surface

A

Have a mass and exert a force in the object

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4
Q

What is pressure

A

Force per unit area

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5
Q

What does the pressure of a fluid mean that force is exerted at

A

Normal to any surface in contact with the fluid (right angle)

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6
Q

What is density

A

Measure of compactness of a substance
How close together the particles in a substance are

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7
Q

What is density for a liquid

A

It’s uniform (the same everywhere) and it doesn’t vary with shape or size

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8
Q

What can density vary in

A

In a gas

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9
Q

What does it mean if a liquid is denser

A

Has more particles in a certain space and more particles are able to collide so it has a higher pressure

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10
Q

Why does liquid pressure increase with depth

A

Number of particles above the point increase
The width of these particles adds to the pressure felt at that point

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