2.3 Thermal Processes Flashcards

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1
Q

In what kind of materials can conduction occur?

A

Solids and liquids.

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2
Q

Describe the process of conduction

A

• Solid/liquid is heated
• Particles vibrate more
• Energy is transferred to adjacent (beside) molecules via collisions, transferring energy from hot to cold regions

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3
Q

In which materials can convection occur?

A

In fluids (liquids and gases).

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4
Q

Describe the process of convection.

A

• When a section of fluid is heated, it becomes less dense
• This causes it to rise
• Denser fluid falls to take its place and is then heated, causing it to rise
• This sets up a convection current

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5
Q

What kind of materials can transfer infrared radiation?

A

Any kind of material; it does not require a medium.

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6
Q

What is infrared radiation?

A

It is an electromagnetic wave.

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7
Q

What are the best absorbers of infrared radiation?

A

Black, dull surfaces.

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8
Q

What are the best emitters of infrared radiation?

A

Black, dull surfaces.

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9
Q

What factors affect the amount of IR emitted by a body?

A

• Temperature (higher = more IR)
• Surface area (larger = more IR)

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