P7.2.3 - Energy Analysis - Heating Flashcards
1
Q
How can you increase the energy in a thermal store?
A
By heating
2
Q
What does a temperature difference produce?
A
A transfer of energy from something hot to something cold
3
Q
What does it mean by the energy has dissipated?
A
The energy has been transferred to the thermal store of the surroundings and is no longer useful
4
Q
How can you reduce the energy dissipated?
A
Lubrication
Insulation
5
Q
Describe insulation.
A
Placing a material that does not conduct very well between a hot and cold object, so the rate of energy transfer is reduced
6
Q
Describe lubrication.
A
Placing a layer of oil between two surfaces. Friction is reduced as the surfaces are no longer in contact
