Energy- Efficiency

Question 1

______ __________ are not 100% efficient and all efficiencies exist between 0-100%.

Answer 1

Energy transfers are not 100% efficient and all efficiencies exist between 0-100%.

Question 2

Useful energy is the energy ____________ into the form of energy that is _______.

Answer 2

Useful energy is the energy transferred into the form of energy that is wanted.

Question 3

Wasted energy is when energy is transferred into a form of energy that is ___ ______.
This is often ________ store or _____ store.

Answer 3

Wasted energy is when energy is transferred into a form of energy that is not useful.
This is often thermal store or sound store.