P2 - Energy Transfer by Heating Flashcards
1
Q
Define thermal conductivity.
A
how fast the energy transf. by conduction through a material
2
Q
Define insulator.
A
material that does not allow energy to be transf. through it
3
Q
How does energy transfer by? In what state of matter?
A
conduction - solids
convection - liquids & gases
radiation - gases & vaccum (space)
4
Q
How can you reduce thermal energy transfer from a house?
A
construct using material with a low thermal conductivity & having thick walls
5
Q
Name 3 types of insulation in a house
A
- loft insulat.
- dble glazing
- cavity wall insulat.
6
Q
Define specific heat capacity.
A
energy required to raise the temperature of 1kg of a substance by 1°C
