Conduction

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Conduction
Convection
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Convection
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Radiation
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Radiation
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Radiation
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Radiation
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Radiation
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• Minimize
• Conduction
• Convection
• Radiation

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-- Questions --
MULTIPLE CHOICE. Choose the one alternative
that best completes the statement or answers the
question.
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1) Cold water will warm to room temperature
faster in a A) black pot. B) silver pot. C)
depends more on the size of the pots than their
color. 2) Metals are both good heat conductors
and good electrical conductors because of the A)
looseness of outer electrons in metal atoms. B)
high elasticity of metals. C) relatively high
densities of metals. D) similarity between
thermal and electrical conductive properties. E)
ability of metals to transfer energy easily.
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• 3) The reason the sun's radiant energy is of
  shorter wavelengths than the Earth's is because
  the sun
• A) has a higher temperature than the Earth.
• B) has much more internal energy.
• C) is an energy source while the Earth is
  primarily an energy receiver.
• D) all of these.
• E) none of these.
• 4) Objects that radiate relatively well,
• absorb radiation relatively well.
• B) reflect radiation relatively well.
• C) both of these.
• D) neither of these.

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• 5) If a solid object radiates more energy than
  it absorbs, its
• temperature decreases.
• B) internal energy decreases.
• C) both of these.
• D) neither of these.
• 6) At the same temperature, which move with the
  greater speed in the air?
• A) very light molecules
• B) heavier molecules
• C) All will have equal average speeds.

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• 7) A good reflector of radiation is
• poor absorber of radiation.
• B) good absorber of radiation.
• C) good emitter of radiation.
• D) none of these.
• 8) The higher the temperature of an object, the
• longer the wavelengths it radiates.
• B) shorter the wavelengths it radiates.

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• 9) Increase the pressure in a container of
  oxygen gas while keeping the temperature constant
  and you increase the
• molecular kinetic energy.
• B) molecular speed.
• C) both of these.
• D) neither of these.
• 10) When a volume of air is compressed, its
  temperature
• A) neither increases nor decreases.
• B) decreases.
• C) increases.

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• 11) If molecules in a gas sample moved so they
  completely missed each other, the gas's
  temperature would
• decrease.
• stay the same.
• C) increase.
• 12) One of the main reasons one can walk
  barefoot on red-hot coals of wood without burning
  the feet has to do with
• A) low temperature of the coals.
• B) mind over matter techniques.
• C) low thermal conductivity of the coals.

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13) A water-filled paper cup held in a flame
will not catch fire. This is because A) the
inside of the paper is wet. B) water is an
excellent conductor of heat. C) the paper cup
cannot become appreciably hotter than the water
it contains. D) paper is a poor conductor of
heat. 14) Your feet feel warmer on a rug than
on a tile floor because the rug A) for the same
mass has more internal energy than tile. B) is
usually warmer than tile. C) is a better
insulator than tile. D) all of these. E) none
of these.
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-- Answers --
MULTIPLE CHOICE. The one alternative that best
completes the statement or answers the question.
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Chapter 16 1) Answer A 2) Answer A 3)
Answer A 4) Answer A 5) Answer C 6)
Answer A 7) Answer A 8) Answer B 9)
Answer D 10) Answer C 11) Answer B 12)
Answer C 13) Answer C 14) Answer C