Question 1

The form of heat transfer that doesn't depend on a medium is

Accepted Answer

A)  conduction.
B)  convection.
C)  radiation.
D)  all of the above

Question 2

The planet Earth loses heat primarily by

Accepted Answer

A)  conduction.
B)  convection.
C)  radiation.
D)  all of the above

Question 3

Both black and white road surfaces radiate energy. At midnight on a starry night the warmer road surface is the

Accepted Answer

A)  black surface.
B)  white surface.
C)  neither, as no noticeable difference.

Question 4

Metals are good conductors of both heat and electricity due to

Accepted Answer

A)  similar thermal and electrical conductive properties.
B)  looseness of outer electrons in metal atoms.
C)  relatively high densities of metals.
D)  high elasticity of metals.
E)  both transferring energy easily. B

Question 5

A red-hot piece of coal will cool quicker in a

Accepted Answer

A)  cold room.
B)  warm over.
C)  both the same.

Question 6

Every equation in physics reminds us of a lesson: we can never change only one thing. When we change the composition of the atmosphere we likely also change

Accepted Answer

A)  its transparency.
B)  its reflectivity.
C)  its average temperature.
D)  Earth's climate.
E)  all of the above

Question 7

A bridge is more likely to be ice covered than the roadway on a cold day because

Accepted Answer

A)  a bridge is more conducting than ground.
B)  a bridge is more commonly wet than ground.
C)  heat upwelling from the ground below is absent on a bridge.
D)  none of the above

Question 8

If a poor absorber of radiation were a good emitter, its temperature would be

Accepted Answer

A)  less than its surroundings.
B)  more than its surroundings.
C)  the same as its surroundings.

Question 9

A good heat conductor is

Accepted Answer

A)  a poor insulator.
B)  a good insulator.
C)  neither of these

Question 10

Sun's radiant energy is composed of shorter wavelengths than Earth's due to Sun's greater

Accepted Answer

A)  size.
B)  surface temperature.
C)  both of these
D)  neither of these

Question 11

A parcel of warmed air rises due to

Accepted Answer

A)  random molecular motion.
B)  radiation.
C)  buoyancy.
D)  increased energy of its molecules.

Question 12

The reason you can walk barefoot on red-hot coals of wood without burning your feet mainly involves

Accepted Answer

A)  low temperature of the coals.
B)  low conductivity of the coals.
C)  mind over matter techniques.

Question 13

When you touch a nail stuck in ice, energy flows from

Accepted Answer

A)  the ice to your hand.
B)  your hand to the ice.
C)  both of these
D)  neither of these

Question 14

At the same temperature, which has greater average speed in the air?

Accepted Answer

A)  very light molecules
B)  heavier molecules
C)  both have equal average speeds.

Question 15

To save energy while you leave your cool house for a half hour on a hot day, turn the temperature setting on the air conditioner

Accepted Answer

A)  down.
B)  up.
C)  off altogether.
D)  to room temperature.

Question 16

Energy transfer by convection is primarily restricted to

Accepted Answer

A)  solids.
B)  liquids.
C)  gases.
D)  fluids.
E)  none of the above

Question 17

The lower the temperature of an object, the

Accepted Answer

A)  lower the frequency of radiation it emits.
B)  longer the wavelengths it radiates.
C)  both of these
D)  neither of these C

Question 18

Waves emitted by the Sun and terrestrial wave emissions are

Accepted Answer

A)  the same except for their frequencies and wavelengths.
B)  entirely different kinds of waves.
C)  identical.

Question 19

A blueberry pie will be a net absorber of energy when its temperature is

Accepted Answer

A)  higher than its surroundings.
B)  lower than its surroundings.
C)  none of these

Question 20

If the composition of the upper atmosphere were altered to permit a greater amount of terrestrial radiation to escape, Earth would be

Accepted Answer

A)  cooler.
B)  warmer.
C)  quite unaffected.
D)  none of the above A

Exam 16: Heat Transfer

The form of heat transfer that doesn't depend on a medium is

Correct AnswerverifiedShow Answer

The planet Earth loses heat primarily by

Correct AnswerverifiedShow Answer

Both black and white road surfaces radiate energy. At midnight on a starry night the warmer road surface is the

Correct AnswerverifiedShow Answer

Metals are good conductors of both heat and electricity due to

Correct AnswerverifiedB

A red-hot piece of coal will cool quicker in a

Correct AnswerverifiedShow Answer

Every equation in physics reminds us of a lesson: we can never change only one thing. When we change the composition of the atmosphere we likely also change

Correct AnswerverifiedShow Answer

A bridge is more likely to be ice covered than the roadway on a cold day because

Correct AnswerverifiedShow Answer

If a poor absorber of radiation were a good emitter, its temperature would be

Correct AnswerverifiedShow Answer

A good heat conductor is

Correct AnswerverifiedShow Answer

Sun's radiant energy is composed of shorter wavelengths than Earth's due to Sun's greater

Correct AnswerverifiedShow Answer

A parcel of warmed air rises due to

Correct AnswerverifiedShow Answer

The reason you can walk barefoot on red-hot coals of wood without burning your feet mainly involves

Correct AnswerverifiedShow Answer

When you touch a nail stuck in ice, energy flows from

Correct AnswerverifiedShow Answer

At the same temperature, which has greater average speed in the air?

Correct AnswerverifiedShow Answer

To save energy while you leave your cool house for a half hour on a hot day, turn the temperature setting on the air conditioner

Correct AnswerverifiedShow Answer

Energy transfer by convection is primarily restricted to

Correct AnswerverifiedShow Answer

The lower the temperature of an object, the

Correct AnswerverifiedC

Waves emitted by the Sun and terrestrial wave emissions are

Correct AnswerverifiedShow Answer

A blueberry pie will be a net absorber of energy when its temperature is

Correct AnswerverifiedShow Answer

If the composition of the upper atmosphere were altered to permit a greater amount of terrestrial radiation to escape, Earth would be

Correct AnswerverifiedA

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B

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C

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A