Chapter 16 - Heat Transfer Flashcards

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1
Q

What is Conduction?

A

Conduction is energy transfer from particle to particle while in direct contact. Conductors have loose outer electrons.

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2
Q

What is an Insulator?

A

An insulator is a poor conductor that can slow the transfer of heat.

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3
Q

Is air a good conductor or insulator?

A

Air is a good insulator. This is why your hand doesn’t get burned when you put it in the oven!

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4
Q

What is Convection?

A

Convection is heat transfer due to the motion of the fluid itself.

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5
Q

Do molecules collide with receding or approaching molecules?

A

Molecules collide with more RECEDING molecules.

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6
Q

What is Radiation?

A

Radiation is light energy from the Sun. It is in the form of electromagnetic waves.

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7
Q

What is the relationship between vibrations and wavelengths?

A

Low-frequency vibrations have long wavelengths.
High-frequency vibrations have short wavelengths.

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8
Q

What is Terrestrial Radiation?

A

Terrestrial radiation is radiant energy emitted by Earth.

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9
Q

What does it mean when something is Infrared?

A

Infrared waves are frequency waves that are invisible to the human eye.

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10
Q

What does a Net Absorber do?

A

Net absorbers absorb more energy than they emit.

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11
Q

What does a Net Emitter do?

A

Net emitters emit more energy than they absorb.

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12
Q

What color do surfaces that absorb light appear?

A

Black!

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13
Q

What is Newton’s Law of Cooling?

A

Heat loss is directly proportional to the difference in the temperatures between the object and its surroundings.

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14
Q

What is the Greenhouse Effect?

A

The greenhouse effect is where the Sun’s energy reaches the Earth’s atmosphere and some is reflected back into space while some is absorbed.

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15
Q

What would Earth’s temperature be without the Greenhouse Effect?

A

Without the greenhouse effect, Earth’s temperature would be -18 degrees C.

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16
Q

What is Global Warming?

A

Global warming says that when Earth’s temperature rises, so do the oceans, etc.

17
Q

What is the Solar Constant?

A

1.4 kW/m^2.
This is the rate at which solar energy is received from the Sun.