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Heat energy can be transferred from areas of high energy to areas of lower energy by conduction, convection and radiation. Understanding how to control these processes helps reduce energy consumption.
In what does conduction mainly occur?
A wooden block has the following dimensions:
Length: 15 cm
Height: 10 cm
Width: 10 cm
It has a mass of 200 g.
What is its density?
Which method of heat transfer does not involve particles?
Which surfaces best absorb infrared radiation?
White, dull surfaces
Black, shiny surfaces
Black, dull surfaces
Which surfaces best emit infrared radiation?
What method of heat transfer explains why hot air balloons rise?
Why does cavity wall insulation contain pockets of trapped air?
Air is a good radiator
Air is a good conductor
Air is a good insulator
How does heat pass through a single pane of window glass?
By conduction and convection
By conduction and radiation
By convection and radiation
This diagram shows a dye in a tube of water. The water is heated at the bottom right hand corner. In which direction will the dye spread?
Double glazing costs £4,000 to install. It saves £200 a year in fuel costs. What is its payback time?