Question 1

The mass of ice that can be melted by 1 gram of 100-degree-C steam is (Hint: Don't forget about hot water remaining from condensed steam)

Accepted Answer

A)  0.148 gram. 
B)  6.75 grams. 
C)  0.125 gram. 
D)  8 grams. 
E)  none of these 
A)  0.148 gram. 
B)  6.75 grams. 
C)  0.125 gram. 
D)  8 grams. 
E)  none of these

Question 2

To turn ice at zero degrees Celsius to water at zero degrees Celsius, we must add

Accepted Answer

A)  energy. 
B)  time. 
C)  force. 
D)  temperature. 
E)  It can't be done - water is always warmer than that. 
A)  energy. 
B)  time. 
C)  force. 
D)  temperature. 
E)  It can't be done - water is always warmer than that.

Question 3

The food in a refrigerator is cooled by

Accepted Answer

A)  vaporization of the refrigerating fluid. 
B)  condensation of the refrigerating fluid. 
C)  the ice in your nearby freezer. 
A)  vaporization of the refrigerating fluid. 
B)  condensation of the refrigerating fluid. 
C)  the ice in your nearby freezer.

Question 4

Suppose you walk on red-hot coals with bare feet. If bits of the coals do not stick to your feet, it would be best if your feet are

Accepted Answer

A)  very hot. 
B)  warm. 
C)  dry. 
D)  wet. 
E)  cold. 
A)  very hot. 
B)  warm. 
C)  dry. 
D)  wet. 
E)  cold.

Question 5

Steam burns are more damaging than burns caused by boiling water because steam

Accepted Answer

A)  gives up additional energy when it condenses. 
B)  has more energy per kilogram than boiling water. 
C)  Choices A and B are both correct. 
D)  Choices B and C are both incorrect. 
A)  gives up additional energy when it condenses. 
B)  has more energy per kilogram than boiling water. 
C)  Choices A and B are both correct. 
D)  Choices B and C are both incorrect.

Question 6

The operation of a geyser, such as Old Faithful in Yellowstone park, is most like the operation of a

Accepted Answer

A)  canteen. 
B)  vat of molten lead. 
C)  coffee percolator. 
D)  teakettle. 
E)  vacuum bottle. 
A)  canteen. 
B)  vat of molten lead. 
C)  coffee percolator. 
D)  teakettle. 
E)  vacuum bottle.

Question 7

The technology for orbiting solar power plants

Accepted Answer

A)  already exists. 
B)  awaits the next century. 
C)  is theoretically impossible. 
A)  already exists. 
B)  awaits the next century. 
C)  is theoretically impossible.

Question 8

Metals are both good heat conductors and good electrical conductors because of the

Accepted Answer

A)  ability of metals to transfer energy easily. 
B)  relatively high densities of metals. 
C)  looseness of outer electrons in metal atoms. 
D)  high elasticity of metals. 
E)  similarity between thermal and electrical conductive properties. 
A)  ability of metals to transfer energy easily. 
B)  relatively high densities of metals. 
C)  looseness of outer electrons in metal atoms. 
D)  high elasticity of metals. 
E)  similarity between thermal and electrical conductive properties.

Question 9

The reason the sun's radiant energy is of shorter wavelengths than the Earth's is because the sun

Accepted Answer

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 
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

Question 10

Newton's law of cooling applies to objects that are

Accepted Answer

A)  heating. 
B)  cooling. 
C)  both of these 
D)  none of these 
A)  heating. 
B)  cooling. 
C)  both of these 
D)  none of these

Question 11

If a solid object radiates more energy than it absorbs, its

Accepted Answer

A)  internal energy decreases. 
B)  temperature decreases. 
C)  internal energy and temperature decrease. 
D)  None of the above choices are true. 
A)  internal energy decreases. 
B)  temperature decreases. 
C)  internal energy and temperature decrease. 
D)  None of the above choices are true.

Question 12

Stored potatoes, beets, and rutabagas freeze at temperatures below zero degrees Celsius (rather than at exactly zero) because

Accepted Answer

A)  They are good absorbers of radiant energy. 
B)  They are good radiators of energy. 
C)  The water in them contains dissolved salts and sugars. 
D)  They are very dense. 
E)  All of the the above choices are true. 
A)  They are good absorbers of radiant energy. 
B)  They are good radiators of energy. 
C)  The water in them contains dissolved salts and sugars. 
D)  They are very dense. 
E)  All of the the above choices are true.

Question 13

The cooling effect inside a refrigerator is produced by

Accepted Answer

A)  an electric motor that converts electrical energy into internal energy. 
B)  vaporizing the refrigeration liquid. 
C)  replacing the warmer air with colder air. 
D)  compressing the refrigeration gas into a liquid. 
E)  proper insulation. 
A)  an electric motor that converts electrical energy into internal energy. 
B)  vaporizing the refrigeration liquid. 
C)  replacing the warmer air with colder air. 
D)  compressing the refrigeration gas into a liquid. 
E)  proper insulation.

Question 14

Compared to a glass of icewater with ice in it, a glass of plain ice-cold water without ice on a warm day will warm up

Accepted Answer

A)  faster. 
B)  slower. 
C)  in the same amount of time. 
D)  None of the above choices are true. 
A)  faster. 
B)  slower. 
C)  in the same amount of time. 
D)  None of the above choices are true.

The mass of ice that can be melted by 1 gram of 100-degree-C steam is (Hint: Don't forget about hot water remaining from condensed steam)

To turn ice at zero degrees Celsius to water at zero degrees Celsius, we must add

The food in a refrigerator is cooled by

Suppose you walk on red-hot coals with bare feet. If bits of the coals do not stick to your feet, it would be best if your feet are

Steam burns are more damaging than burns caused by boiling water because steam

The operation of a geyser, such as Old Faithful in Yellowstone park, is most like the operation of a

The technology for orbiting solar power plants

Metals are both good heat conductors and good electrical conductors because of the

The reason the sun's radiant energy is of shorter wavelengths than the Earth's is because the sun

Newton's law of cooling applies to objects that are

If a solid object radiates more energy than it absorbs, its

Stored potatoes, beets, and rutabagas freeze at temperatures below zero degrees Celsius (rather than at exactly zero) because

The cooling effect inside a refrigerator is produced by

Compared to a glass of icewater with ice in it, a glass of plain ice-cold water without ice on a warm day will warm up

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Newtons Laws of Motion

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Temperature, Heat, and Thermodynamics

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Exam 9: Heat Transfer and Change of Phase

The mass of ice that can be melted by 1 gram of 100-degree-C steam is (Hint: Don't forget about hot water remaining from condensed steam)

To turn ice at zero degrees Celsius to water at zero degrees Celsius, we must add

The food in a refrigerator is cooled by

Suppose you walk on red-hot coals with bare feet. If bits of the coals do not stick to your feet, it would be best if your feet are

Steam burns are more damaging than burns caused by boiling water because steam

The operation of a geyser, such as Old Faithful in Yellowstone park, is most like the operation of a

The technology for orbiting solar power plants

Metals are both good heat conductors and good electrical conductors because of the

The reason the sun's radiant energy is of shorter wavelengths than the Earth's is because the sun

Newton's law of cooling applies to objects that are

If a solid object radiates more energy than it absorbs, its

Stored potatoes, beets, and rutabagas freeze at temperatures below zero degrees Celsius (rather than at exactly zero) because

The cooling effect inside a refrigerator is produced by

Compared to a glass of icewater with ice in it, a glass of plain ice-cold water without ice on a warm day will warm up

About Science

Atoms

Equilibrium and Linear Motion

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Temperature, Heat, and Thermodynamics

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light Waves

Properties of Light

Quantum Theory

The Atomic Nucleus and Radioactivity

Physics of Rotation and Equilibrium

Filters