Energy Transfer, Work, Heating And Cooling

Question 1

What are the 6 types of energy’s?

Answer 1

Gravitational potential
Electrical
Elastic potential
kinetic
thermal
chemical

Question 2

what is power

Answer 2

Power is a measure of how quickly energy is transferred

Question 3

What is power measured in?

Answer 3

Watts

Question 4

How do you calculate power?

Answer 4

power = energy transfer / time

Question 5

energy is __________. It can not be _________ or __________

Answer 5

conserved. created or destroyed

Question 6

What is dissipation

Answer 6

a term that is often used to describe ways in which energy is wasted

Question 7

How is work done affected?

Answer 7

by distance travelled, it can also be affected by factors that make it more or less difficult to exert or force

Question 8

What’s the diufr

Question 9

What is conduction?

Answer 9

Conduction is the process by which thermal energy is transferred through solids.

Question 10

How does energy transfer occur in conduction?

Answer 10

Energy is transferred to the particles nearest the heat source, causing them to vibrate faster. These vibrating particles collide with other particles, transferring energy, which continues to repeat.

Question 11

What factors affect conduction?

Answer 11

1) Density - how closely packed the particles are. 2) Quantity - the number of particles that need to collide.

Question 12

What is an insulator?

Answer 12

An insulator is a material that does not allow energy to transfer through it easily; energy will be transferred but very slowly.

Question 13

Example of conduction in a pan?

Answer 13

A pan heats up when energy particles transfer through the pan until it is heated and vibrate faster.

Question 14

What materials are good insulators?

Answer 14

Insulators are usually made from wood or plastic because they are good insulators and won’t burn you.

Question 15

Why are bricks good insulators?

Answer 15

Bricks are good insulators because of their material composition, allowing them to keep a lot of heat in the house.

Question 16

What is thermal radiation also called?

Answer 16

Thermal radiation is also called infrared radiation.

Question 17

What happens to infrared radiation emission as the temperature of an object increases?

Answer 17

The hotter an object is, the more infrared radiation it emits per second.

Question 18

What factors affect the amount of infrared radiation emitted or absorbed?

Answer 18

The amount of infrared radiation emitted or absorbed depends on the temperature and colour of the surface.

Question 19

What are some uses of infrared cameras?

Answer 19

Uses of infrared cameras include:
- Car engine burn heating up
- Finding people
- Finding planets

Question 20

Which surfaces are better absorbers of infrared radiation?

Answer 20

Dark, dull surfaces are better absorbers of infrared radiation than shiny, light surfaces.

Question 21

Which surfaces are better emitters of infrared radiation?

Answer 21

Dark, dull surfaces are better emitters of infrared radiation than shiny, light surfaces.

Question 22

What is density?

Answer 22

Density is the amount of mass (number of particles) in a particular volume.

Question 23

Why does ice float on water?

Answer 23

Ice floats on water because it is less dense than water.

Question 24

How does oil behave in water?

Answer 24

Oil is more dense than air but less dense than water, so it floats on the water.

Question 25

What happens to particles when they gain energy from heat?

Answer 25

The particles closest to the heat source gain more energy, move away from each other, and become less dense and rise.

Question 26

What occurs as particles move away from the heat source?

Answer 26

As particles move away from the heat source, they transfer energy away, move closer together, become more dense, and sink.

Question 27

What is the process that occurs with particles and heat?

Answer 27

The particles move back towards the heat source and the process repeats.

Question 28

What is conduction?

Answer 28

Conduction is the process by which thermal energy is transferred through a solid material. ## Footnote Examples include metals and ceramics.

Question 29

What is convection?

Answer 29

Convection is the transfer of thermal energy through the movement of fluids (liquids or gases).

Question 30

What is radiation?

Answer 30

Radiation is the transfer of thermal energy through electromagnetic waves.

Question 31

What is an insulator?

Answer 31

An insulator is a material that does not allow thermal energy to pass through it easily. ## Footnote Examples include wood and plastic.

Question 32

What is a conductor?

Answer 32

A conductor is a solid material that allows thermal energy to pass through it easily and quickly. ## Footnote Examples include metals and ceramics.

Question 33

What are some examples of insulation materials?

Answer 33

1. Wall insulation 2. Carpet 3. Cavity wall insulation 4. Radiator cover 5. 10ft insulation 6. Curtains 7. Fiberglass 8. Double glazing

Question 34

What is the aim of the investigation?

Answer 34

The aim is to keep the water hot.

Question 35

What is the independent variable in the investigation?

Answer 35

The type of insulation used.

Question 36

What is the dependent variable in the investigation?

Answer 36

The temperature change over time.

Question 37

What is the control variable in the investigation?

Answer 37

The volume of water.

Question 38

What is Convection?

Answer 38

Convection transfers heat through liquids and gases by the movement of current. ## Footnote It happens in water where hot particles become less dense.

Question 39

What is Conduction?

Answer 39

Conduction is the transfer of heat in solids where particles vibrate and pass on energy from hot to cold. ## Footnote Metals are good conductors.

Question 40

What is Radiation?

Answer 40

Radiation is how the sun's energy reaches Earth without needing particles, through electromagnetic waves. ## Footnote It involves absorption, emission, or reflection.