Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
6 Cards in this Set
- Front
- Back
|
Thermal energy transfer |
Flow frm region of higher temo to region of lower temp. Net flow occur when there is a diff in temp |
|
|
Conduction |
Transfer of thermal energy through a medium (no flow of medium). Particles gain energy when heat and start to vibrate vigorously Collide with neighbouring particles, transferring energy. |
|
|
Metals are btr conductor |
Free moving electrons Particles are spaced closer tgt |
|
|
Convection |
Transfer of thermal energy through a fluid due to density Air heat up, expand becomes less dense and rise. Denser cold air sink Set up a convection current
|
|
|
Radiation |
Transfer of thermal energy without a medium in the form of infrared radiation. Can transfer in a vacuum e.g. sun to earth |
|
|
Affect radiation rate |
Texture, colour, surface area Black and dull are good absorbers and emitters Silver and shiny and bad absorbers and emitters |
