Conduction, Convection and Radiation Flashcards
1
Q
What is the Law of Conservation of Energy?
A
Energy can neither be created or destroyed
2
Q
Equation for efficiency?
A
energy output
———————– x 100
energy input
3
Q
What is conduction?
A
transfer of thermal energy through the direct contact of particles
- the particles transfer their energy from to the particles on the colder side
4
Q
Why can metals only be conductors
A
The sea of electrons
5
Q
What is convection
A
The transfer of thermal energy through currents
- Occurs in liquids and gasses
- As liquds and gasses gain thermal energy, they expand and decrease in density
6
Q
What is radiation?
A
transfer of thermal energy by electromagnetic waves
- Does not require particles
- When radiation hits an object thermal energy can be absorbed or emitted
7
Q
ionising definition
A
The adding + removal of electrons
