1.2 Energy And Efficiency

Question 1

What is the pneumonic for remembering the different types of energy?

Answer 1

Most kids hate learning GCSE energy names

Question 2

Name the 10 types of energy

Answer 2

Magnetic
Kinetic
Heat
Light
Gravitational potential 
Chemical
Sound
Elastic potential
Electrical
Nuclear

Question 3

What does efficiency show?

Answer 3

How good something is at transferring useful energy

Question 4

What is payback time?

Answer 4

The time it takes you to get your money back on what you installed

Question 5

How to calculate payback time?

Answer 5

Cost of installation
Divided by
Annual savings

Question 6

What is cost effectiveness?

Answer 6

Is it worth doing?
I.e
The payback time is quick
The revenue is large

Question 7

What does a Sankey diagram show?

Answer 7

Energy changes

Question 8

What is the criteria for an accurate sankey diagram?

Answer 8

The width if the arrows shows the proportion
Useful energy goes across
Wasteful energy comes off at a curve downwards

Question 9

What is the law of conservation of energy?

Answer 9

Energy cannot by created or destroyed only transferred from one form to another

Question 10

What is entropy?

Answer 10

A measure of unavailable energy in a closed system

Question 11

Where is wasted energy transferred?

Answer 11

To the surroundings