physics 2 Flashcards
1
Q
What does a material’s thermal conductivity tell you?
A
how well it conducts heat
2
Q
Which materials have low thermal conductivity?
A
thermal insulators
3
Q
Give three factors that determine the rate of thermal energy transfer through a material.
A
-thermal conductivity of material
-temperature difference
-thickness of material
4
Q
What factors affect the rate of heat loss from a building?
A
thickness of walls and roof, thermal conductivity of walls and roof, the temperature difference between the two sides of the wall/roof
5
Q
Define specific heat capacity.
A
amount of energy needed to raise the temperature of 1 kg of a material by 1 °C
