Energy transfer by heating

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  • Created by: Sam Evans
  • Created on: 22-05-14 20:20
What is the best colour for a central heating radiator, glossy white or dull black?
Dull black
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Why does solid have a fixed volume?
The particles are held together in a fixed position
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When a liquid evaporates, why is the average kinetic energy of the remaining molecules reduced?
The morst energetic molecules leave the liquid so the average kinetic energy of the remaining moleculs is reduced
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What happens to the rate of energy transfer between an object and its surroundings if the temperature difference between them is reduced?
If the temperature difference is reduced, the rate of energy transfer decreases
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Which types of energy transfer involve particles?
Conduction, convection and evaporation involve particles
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How does energy from the Sun reach the Earth?
By radiation that travels through space
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How does the colour of a surface affect the rate of conduction?
The colour of a surface has no effect on the rate of conduction
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Why are gases poor conductors?
Because the particles are too far apart
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Why are metals the best conductors?
Because they contain free electrons
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What is convection?
Convection is the movement of energy through a fluid by movement of the fluid itself
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How does the cavity wall insulation reduce energy transfer from a house?
Cavity wall insulation traps the air in the cavity in pockets so it prevents convection currents from being set up
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Other cards in this set

Card 2

Front

Why does solid have a fixed volume?

Back

The particles are held together in a fixed position

Card 3

Front

When a liquid evaporates, why is the average kinetic energy of the remaining molecules reduced?

Back

Preview of the front of card 3

Card 4

Front

What happens to the rate of energy transfer between an object and its surroundings if the temperature difference between them is reduced?

Back

Preview of the front of card 4

Card 5

Front

Which types of energy transfer involve particles?

Back

Preview of the front of card 5
View more cards

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