Heat Transfer and Temperature Change (Leaving Cert Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does a heat pump do?
What does a heat pump do?
Moves heat from cooler to warmer place
Which property must a refrigerant have?
Which property must a refrigerant have?
High specific latent heat of vaporisation
What happens at the compressor in a heat pump?
What happens at the compressor in a heat pump?
Gas pressure and temperature increase
How does conduction transfer heat?
How does conduction transfer heat?
By molecular vibration without movement
What makes thermal conductors different from insulators?
What makes thermal conductors different from insulators?
Conductors allow heat to flow easily
Why does warmer fluid rise in convection?
Why does warmer fluid rise in convection?
It is less dense than cooler fluid
What makes radiation different from conduction and convection?
What makes radiation different from conduction and convection?
It doesn't need any material medium
How do dark colours affect heat radiation?
How do dark colours affect heat radiation?
They absorb and emit excellently
What does a high U-value indicate?
What does a high U-value indicate?
Poor insulation
Calculate heat loss: area m², U-value W m⁻² K⁻¹, temp difference °C. Power lost?
Calculate heat loss: area m², U-value W m⁻² K⁻¹, temp difference °C. Power lost?
W
What is the largest source of heat loss in an uninsulated house?
What is the largest source of heat loss in an uninsulated house?
Through walls (35%)
Which insulation method reduces conduction through windows?
Which insulation method reduces conduction through windows?
Double glazing