# physics

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• Created by: a-bbby
• Created on: 05-04-16 15:44
1) Describe the 3 ways that heat energy can be transferred.
Heat energy can be transferred by radiation, conduction or convection
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2) True/false? An object that's cooler than it's surroundings emits more radiation than it absorbs.
False. It absorbs more radiation than it emits.
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3) Explain why solar hot water panels have a matt black surface.
Matt black surfaces absorb infrared radiation(heat) falling on them much better than gloss white surfaces. This means the water can be heated faster.
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4) Describe the arrangement and movement of the particles in solids.
A) Solids-strong forces of attraction hold the particles close together in a fixed, regular arrangement. The particles don't have much energy so they can only vibrate about their fixed positions.
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4) Describe the arrangement and movement of the particles in liquids.
There are weaker forces of attraction between the particles. The particles are close together, but can move past each other, and form irregular arrangements. They have more energy then the particles in a solid.
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6) Describe the arrangement and movement of the particles in gases.
There are almost no forces of attraction between the particles. The particles have more energy than those in liquids and solids.
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7) What is the name of the process where vibrating particles pass on their extra kinetic energy to neighbouring particles?
Conduction of heat energy is the process where vibrating particles pass on their extra kinetic energy to neighbouring particles.
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8) Which type of heat transfer can't take place in solids Convection/Conduction?
Convection.
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9) Describe how the heat from heater coils is transferred throughout the water in a kettle. What is this process called?
Heat energy is transferred from the heater coils to the water by conduction.
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10) What happens to the particles of a gas as it turns to a liquid?
When gas cools, the particles slow down and lose kinetic energy. Attractive forces between the particles pull them together. If the temperature gets cold enough and the particles get close enough, condensation can take place and it becomes a liquid.
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11) What is the name given to the process where a gas turns to a liquid?
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12) Why does evaporation have a cooling effect on a liquid?
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## Other cards in this set

### Card 2

#### Front

2) True/false? An object that's cooler than it's surroundings emits more radiation than it absorbs.

#### Back

False. It absorbs more radiation than it emits.

### Card 3

#### Front

3) Explain why solar hot water panels have a matt black surface.

### Card 4

#### Front

4) Describe the arrangement and movement of the particles in solids.

### Card 5

#### Front

4) Describe the arrangement and movement of the particles in liquids.