P2- Insulation

Question 1

What is thermal energy?

Answer 1

Thermal energy is the energy contained within a system that is responsible for its temperature

Question 2

What is the equation for specific heat capacity?

Answer 2

E=mcθ

Question 3

What is θ?

Answer 3

The change in temperature

Question 4

What does c stand for?

Answer 4

Specific heat capacity

Question 5

What are the units of c (specific heat capacity)?

Answer 5

J/kg°C

Question 6

What is conduction and when does it occur?

Answer 6

Conduction occurs when two things at different temperatures touch each other and energy directly transfers from the material in the hotter object to the material in the colder object at the point of contact.

Question 7

What are the three main heat transfers?

Answer 7

Conduction, convection and radiation

Question 8

How does convection work?

Answer 8

Convection works by areas of a liquid or gas heating or cooling greater than their surroundings, causing differences in temperature. These temperature differences then cause the areas to move as the hotter, less dense areas rise, and the cooler, more dense areas sink.

Question 9

How does infrared radiation work?

Answer 9

The infrared radiation causes the bonds between molecules to move, releasing energy that is felt as heat.

Question 10

What type of wave is infrared radiation?

Answer 10

Electromagnetic

Question 11

How does loft insulation work?

Answer 11

Loft insulation works by preventing the movement of heated air through the material.