Energy Resources And Transfer Flashcards
1
Q
What is the law for the conservation of energy?
A
Energy is neither created nor destroyed, it’s only converted from one form to another
2
Q
What is the energy efficiency calculation?
A
Useful energy output ÷ total energy input
3
Q
What happens in convection?
A
- Hot liquid/air expands and becomes less dense than its surroundings
- The hot water rises
- The other water takes its place
4
Q
What affects infrared radiation?
A
- If the object is warmer
2. Objects with a larger surface area emit more
5
Q
Which surfaces emit I.r best?
A
Matt black surfaces
6
Q
Which surfaces are the best I.r absorbers?
A
Matt black surfaces
7
Q
Which surfaces are the best reflectors?
A
Shiny silver surfaces
