Fluids

Question 1

What are fluids?

Answer 1

A substance that has the capacity to flow and assume the form of the container into which it has been poured

Question 2

Particles of a liquid

Answer 2

Close together and are held together by weak forces of attraction. The particles can slide all over each other and take on the form of a container

Question 3

Particles of gas

Answer 3

Much further apart and are not bound together by forces of attraction. They move in all different directions and take up its whole container

Question 4

What substances can be fluids ?

Answer 4

Liquid because it assumes the shape of a glass cause the forces of attraction are not as strong

Gas because no forces of attraction exist between the particles. Air moves around the respiratory system, occupying all available space

Question 5

What fluid can be hard to identify?

Answer 5

Gases or liquid that are mixtures with solids in a suspension. (They are still fluids because they flow (also colloids) ex: smoke)

Gels and pastes that take on the form of their containers are also fluids. Ex: tooth paste

Sand is not a fluid. It flows but it is not continuous. It also forms a pile and does not necessarily take the form of its container.

Question 6

What are the two types of fluids?

Answer 6

Compressible and incompressible

Question 7

What is a compressible fluid ?

Answer 7

A fluid who’s volume can change in response to a change in pressure. Gases are compressible fluids.
Gases take up all the space in a given container. If you change the size of the container the gases volume will change.

Question 8

What is an incompressible fluid?

Answer 8

A fluid who’s volume cannot change.
Liquid are incompressible
The molecules are already very close together. The volume canot change even with a change in the size of container.

Question 9

What is pressure ?

Answer 9

The result of a force applied in a perpendicular fashion to a surface

Question 10

I want to variables does pressure depend on?

Answer 10

Force and the area of the surface

Question 11

What is the formula?

Answer 11

Pressure = force / area

Question 12

What is a force ?

Answer 12

An action applied to an object that changes the shape or movement of that object

Question 13

What happens when you increase force ?

Answer 13

Increased pressure

Question 14

What happens when you decrease force?

Answer 14

Decreased pressure ?

Question 15

Example of force

Answer 15

Slow down
Accelerate
Deviate
Stop

Question 16

Pressure and force and in a ______ relationship

Answer 16

Direct

Question 17

What is surface area?

Answer 17

The surface dimension of the object that is applying the force

Question 18

What happens if the surface area where the force is being applied increases?

Answer 18

Decrease in pressure

Question 19

What happens if the surface area exposed to the force decreases?

Answer 19

Increase in pressure

Question 20

Pressure and area have _________ relationship

Answer 20

Inverse

Question 21

How is (p) pressure measured?

Answer 21

In Pa (pascals)

Question 22

How is f (force) measured?

Answer 22

In Newtons (N)

Question 23

How is A (area) measured ?

Answer 23

In m squared