You Can Reduce the Rate of Energy Transfer Flashcards
What do all objects have?
A thermal conductivity
What does thermal conductivity describe?
How well an object transfers energy by conduction
Materials with a …… …….. ……… transfer energy between their particles quickly
High thermal conductivity
How do you reduce energy transfers away from a system by conduction?
Use materials with low thermal conductivity
How do you reduce convection?
You need to stop the fluid moving, and prevent convection currents from forming
How does insulation such as clothes, blankets and foam cavity wall insulation work?
By trapping pockets of air
Which is better at absorbing / emitting radiation: white or black surface?
Black
How do you reduce the energy transfers away from an object by thermal energy?
The object should be designed with a surface that is a poor emitter
