Engergy efficiency Flashcards
1
Q
What is the formula for energy efficiency?
A
useful output energy
—————————– *100
total input energy
2
Q
What does energy efficiency tell us?
A
It tells us how good an appliance, the more efficient an appliance is the cheaper it is to run.
3
Q
what is the formula to work out the total energy input?
A
the USEFUL energy+ the WASTED energy= total energy INPUT.
4
Q
What are the eight forms of energy?
A
Electrical, Light, Sound, Kinetic, Thermal, Gravitational potential, Elastic, Chemical.
5
Q
what is the difference between heat and temperature?
A
Temperature is a measure of how hot something is- it is measured in degrees Celsius(*c), Heat is a form of energy measured in joules (J).
