What is input energy?

What is an example of this?

What is output energy?

What is an example of this?

What is useful energy?

What is wasted energy?

What is an example useful energy?

What is an example of wasted energy?

What is energy efficiency?

How is energy efficiency calculated?

What are energy rating labels?

On what types of appliances are energy rating labels used?

What benefits does efficient housing usually provide?

What is an example of this?

Do houses also include energy efficiency star rating?

What are some improvements that can be made to a house's design?

What are some other energy efficient designs that have been studied recently?

Whom are two people who contributed to aircraft development over time before the Wright brothers?

When did the Wright brothers release their first successful glider?

What was the recorded distance that they were able to fly by 1905?