Heat Transfer Flashcards
1
Q
How does heat in a conductor flow?
A
From a higher temperature to a lower temperatures
2
Q
What is convection?
A
The movement of heat through liquids and gases
Warm air rises, cools, then sinks, warms up, rises, etc.
3
Q
What is heat?
A
A form of energy.
4
Q
What is temperature?
A
A measure of how hot or cold something is.
5
Q
How is heat emitted from the sun?
A
Radiation
6
Q
How do the colours white and black interact with heat?
A
White reflects heat
Black absorbs heat
7
Q
How does convection work?
A
Liquid/gas heated from the bottom rises, cools as it reaches the top, and then sinks back down to be warmed again.
8
Q
How is conduction and convection prevented in the walls of homes?
What materials can be used?
A
Cavity wall insulation.
Kingspan, polystyrene balls, fibreglass
