energy - LT Flashcards
1
Q
what is the meaning of wasted energy
A
any energy that comes out of a situation that we didnt intend for it to be there
e.g. in light bulb - electrical energy goes in and pproduces light(useful) , heat and sound(not useful so wasted energy)
2
Q
what happens to watsed energy
A
dissapates into the surroundings
3
Q
how can houses be energy efficient
A
cavity wall insulation double glazing loft insulation curtains carpet
4
Q
what is the equation for efficiency(energy)
A
efficiency = useful energy output/ total energy in
5
Q
what is the equation for efficiency(power)
A
efficiency = useful power output/total power in
