P2 energy transfer by heating Flashcards
1
Q
lowering rate of transfer of heat
A
thicker insulator
lower the thermal conductivity, lower the rate of energy transfer through it
2
Q
infrared radiation factors
A
hotter an object is, more infrared radiation it emits in a given time
3
Q
blackbody radiation
A
radiation emitted by a body that absorbs all radiation incident upon it
4
Q
temp increase of object
A
absorbing more radiation than emitted
5
Q
SHC definition
A
amount of energy needed to change the temperature of 1kg of a substance by 1C
6
Q
energy transferred (SHC)
A
mass x SHC x temp change
7
Q
reducing rate of energy transfer from houses
A
loft insulation cavity wall insulation double glazed windows aluminium foil behind radiators external walls w thicker bricks and lower thermal conductivity
