Topic 3-Mix & Flow

Question 1

Pressure

Answer 1

The amount of force applied to a given area.

Question 2

What unit it pressure measured in?

Answer 2

Pascals (Pa)

Question 3

What is the formula used to calculate pressure?

Answer 3

Pressure = Force
——
Area

Question 4

When calculating pressure, what unit is force measured in?

Answer 4

Newtons

Question 5

When calculating pressure, what unit is area measured in?

Answer 5

Meyers squared

Question 6

Pascal’s Law

Answer 6

Enclosed fluid transfers pressure equally in all directions.

Question 7

Hydraulic System

Answer 7

A system that uses compressed liquids

Question 8

Pneumatic Devices

Answer 8

A system that uses compressed air.

Question 9

Compressibility

Answer 9

How much a given volume of matter decreases when placed under pressure.

Question 10

What states of matter are incompressible?

Answer 10

Solid and Liquid

Question 11

What state of matter is compressible?

Answer 11

Gas

Question 12

What happens when the space between particles increases?

Answer 12

It becomes more compressible.

Question 13

What happens when there are less space between particles?

Answer 13

It becomes less compressible.

Question 14

Buoyancy

Answer 14

The force that pushes back against an object to make it float.

Question 15

Positive Buoyancy

Answer 15

When an object floats quite close to the surface of the water.

Question 16

Neutral Buoyancy

Answer 16

When an object floats in the middle of the water, between the surface and bottom.

Question 17

Negative Buoyancy

Answer 17

When an object floats on the bottom of the water.

Question 18

Buoyant Force

Answer 18

The upward force exerted by any fluid upon a object placed on it.

Question 19

What is a Plimsol Line

Answer 19

A reference mark located on a ship’s hull that indicates the maximum depth to which the vessel may be safely immersed when loaded with cargo.

Question 20

Density

Answer 20

How close together the particles are. Mass per unit volume of a substance.

Question 21

Describe density using the particle model of matter.

Answer 21

Solids - tight particles - more dense

Liquids - looser particles - less dense

Gases - very loose particles - least dense

Question 22

What happens when you increase the temperature of matter?

Answer 22

A substance will change from solid, to liquid, to gas

Particles of a substance spread out

Particles will take up more space.

Question 23

What is the formula used to measure density.

Answer 23

Density = mass divided by volume.

Question 24

What units are used to measure the density of a solid?

Answer 24

grams per centimetre squared.

Question 25

What units are used to measure the density of a liquid?

Answer 25

Grams per litre or grams per millilitre

Question 26

Viscosity

Answer 26

How thick or thin the substance is.

Question 27

What happens when the thickness of a substance goes up?

Answer 27

It becomes more viscous

Question 28

What happens to the thickness of a substance goes down?

Answer 28

It becomes less viscous

Question 29

How do you measure viscosity?

Answer 29

You test the substances Flow rate.

Question 30

What happens to a liquids viscosity level when you increase the temperature?

Answer 30

It decreases

Question 31

What happens to the viscosity of a gas when the temperature goes up?

Answer 31

It increases

Question 32

Incompressible

Answer 32

Cannot be compressed easily