p2 and p3- energy transfer by heating and energy resources Flashcards
1
Q
what is the best conductor of energy?
A
metal
2
Q
what are the best insulators?
A
non metal materials such as wool and fibre glass
3
Q
energy transferred =
A
mass (kg) x specific heat capacity (j/kg) x temperature change
4
Q
what can the rate of energy transfers from houses be reduced by?
A
loft insulation, cavity wall insulation, double glazed windows, aluminium behind radiators
5
Q
what type of sources of energy are biofuels?
A
renewable
6
Q
what do fossil fuels produce?
A
greenhouse gases
7
Q
will renewable energy run out?
A
no
8
Q
what are the disadvantages of nuclear power stations?
A
expensive and produce harmful emissions
