Viscosity And Fluids

Question 1

Aerodynamic drag

Answer 1

When a solids moves through a fluid and creates air resistance

Question 2

Convection currents

Answer 2

Warm fluids rise bc their particles are moving faster
Cold fluids sink bc their particles are moving slower
Eg: in the ocean with tides

Question 3

How does tempature affect viscosity

Answer 3

The warmer the fluid, the less viscous it becomes
Eg: corn syrup flows easier when it’s warm
Eg: when u start ur engine on a cold day, the oil is cold and thick. When u start ur car engine, the oil warms up with it and becomes less viscous

Question 4

Liquids

Answer 4

Takes shape of container

Free surface

D. Mass
D. Volume
I. Shape
A bit of compressibility
Expands a bit on heating

Question 5

Gases

Answer 5

Take shape and volume of container

Move in straight lines until it hits another particle of the edge of container

D. Mass
I. Volume
I. Shape
A lot of compressibility 
Expands a lot on heating

Question 6

Solids

Answer 6

Holds its shape

D. Mass
D. Volume
D. Shape
A tiny bit of compressibility 
Expands a tiny bit on heating

Question 7

The particle theory

Answer 7

A way of describing matter and its Behavior

1) all matter is made of particles
2) all particles are in constant motion (absolute zero=no movement)
3) all particles of the same substance are identical (mixing more than 2 different substances is called alloy)
4) tempature effects the speed at which particles move at
5) there are spaces between particles
6) particles have forces of attraction between them

Question 8

Speed and velocity

Answer 8

Speed=
Distance and time

Velocity=
Distance and time and direction

Question 9

All matter is composed of ____________+____________ that are too small to see.

All of the particles of matter are in constant __________ because they have energy.

Particles in solids are held tightly in place but still _______. Particles in liquids move more _______. Particles in gases move ________ freely yet. The particles of matter are held together with forces of _______________.

The size of the space between particles _________ depending on the type of matter.

The addition of _________ energy caused particles to move faster, __________ their bonds.

Some particles are more attracted to particles of __________ substances that particles of their ________.

Answer 9

1) molecules, atoms
2) motion
3) move, freely, attraction
4) varies
5) heat,stretching
6) other, own

Question 10

Flow rate

Answer 10

Measure of speed of fluid flow

Question 11

Matter

Answer 11

Anything that has mass and volume

Question 12

Pneumatics

Answer 12

A system that uses gas under pressure

Question 13

Slurry

Answer 13

A mixture of water and solids

Question 14

Mass

Answer 14

How much matter in a substance

Question 15

Volume

Answer 15

How much space a substance takes up

Question 16

Viscosity

Answer 16

A resistance of a fluid’s flow

Question 17

Valve

Answer 17

Device that controls the flow of fluids

Question 18

Compression

Answer 18

A decrease of volume

Question 19

Friction

Answer 19

Slows down motion

Question 20

Pump

Answer 20

Device that moves a fluid

Question 21

Buoyancy

Answer 21

Tendency of an object to rise or sink

Question 22

Hydrolics

Answer 22

A system that uses liquid under pressure

Question 23

Pressure

Answer 23

Amount of force applied to a given area

Question 24

SAE grades

Answer 24

The higher the first number, the higher the viscosity

Some of the numbers have a W to designate their “winter” or “cold start” viscosity, at a lower temperature

Question 25

Fluids

Answer 25

Fluids flow, take up space, move around easily, take the shape of the container

Liquids and gases are fluids

you can move through fluids

     EG: MARBLES ARE LIKE PARTICLES OF A FLUID