Question 1

An object will normally be a net radiator of energy when its temperature is

Accepted Answer

A)  lower than its surroundings. 
B)  higher than its surroundings. 
C)  neither of these 
A)  lower than its surroundings. 
B)  higher than its surroundings. 
C)  neither of these

Question 2

When heat is added to boiling water, its temperature

Accepted Answer

A)  increases. 
B)  decreases. 
C)  does not change. 
A)  increases. 
B)  decreases. 
C)  does not change.

Question 3

Cold water will warm to room temperature faster in a

Accepted Answer

A)  black pot. 
B)  silver pot. 
C)  depends more on the size of the pots than their color 
A)  black pot. 
B)  silver pot. 
C)  depends more on the size of the pots than their color

Question 4

When snow forms in clouds, the surrounding air

Accepted Answer

A)  cools. 
B)  warms. 
C)  neither warms nor cools. 
A)  cools. 
B)  warms. 
C)  neither warms nor cools.

Question 5

The planet Earth loses heat mainly by

Accepted Answer

A)  conduction. 
B)  radiation. 
C)  convection. 
D)  all of these 
A)  conduction. 
B)  radiation. 
C)  convection. 
D)  all of these

Question 6

If molecules in a gas sample moved so they completely missed each other, the gas's temperature would

Accepted Answer

A)  decrease. 
B)  increase. 
C)  stay the same. 
A)  decrease. 
B)  increase. 
C)  stay the same.

Question 7

Warm air rises because faster-moving molecules tend to move to regions of less

Accepted Answer

A)  density and less pressure. 
B)  pressure. 
C)  density. 
A)  density and less pressure. 
B)  pressure. 
C)  density.

Question 8

A water-filled paper cup held in a flame will not catch fire. This is because

Accepted Answer

A)  water is an excellent conductor of heat. 
B)  the inside of the paper is wet. 
C)  paper is a poor conductor of heat. 
D)  the paper cup cannot become appreciably hotter than the water it contains. 
A)  water is an excellent conductor of heat. 
B)  the inside of the paper is wet. 
C)  paper is a poor conductor of heat. 
D)  the paper cup cannot become appreciably hotter than the water it contains.

Question 9

Stored potatoes, beets, and rutabagas in a well-insulated but unheated room can be protected from freezing by having in the room

Accepted Answer

A)  large tubs of water. 
B)  large blocks of salt. 
C)  large rocks. 
D)  large blocks of foam plastic. 
E)  large cubes of sugar. 
A)  large tubs of water. 
B)  large blocks of salt. 
C)  large rocks. 
D)  large blocks of foam plastic. 
E)  large cubes of sugar.

Question 10

Which involves the larger number of calories?

Accepted Answer

A)  the condensation of 1 gram of steam at 100 degrees Celsius to water at 100 degrees 
B)  the cooling of 1 gram of water at 100 degrees Celsius to 1 gram of ice at absolute zero 
C)  Both involve the same number of calories. 
D)  Neither involves calories. 
A)  the condensation of 1 gram of steam at 100 degrees Celsius to water at 100 degrees 
B)  the cooling of 1 gram of water at 100 degrees Celsius to 1 gram of ice at absolute zero 
C)  Both involve the same number of calories. 
D)  Neither involves calories.

Question 11

A hot dog pants

Accepted Answer

A)  to bring more oxygen into its lungs. 
B)  for no particular reason - some things just happen. 
C)  to impress dogs of the opposite sex. 
D)  to help evaporation occur in its mouth and bronchial tract. 
A)  to bring more oxygen into its lungs. 
B)  for no particular reason - some things just happen. 
C)  to impress dogs of the opposite sex. 
D)  to help evaporation occur in its mouth and bronchial tract.

Question 12

Increased air pressure on the surface of hot water tends to

Accepted Answer

A)  prevent boiling . 
B)  promote boiling. 
C)  Neither choice A nor choice B is true. 
D)  Choice A and choice B are both true. 
A)  prevent boiling . 
B)  promote boiling. 
C)  Neither choice A nor choice B is true. 
D)  Choice A and choice B are both true.

Question 13

Boiling water does not increase in temperature when additional heat is applied because

Accepted Answer

A)  added input energy doesn't increase the water's internal energy. 
B)  the temperature doesn't change in a change of state. 
C)  the increased heating produces increased boiling, and therefore increased cooling. 
D)  none of these 
A)  added input energy doesn't increase the water's internal energy. 
B)  the temperature doesn't change in a change of state. 
C)  the increased heating produces increased boiling, and therefore increased cooling. 
D)  none of these

Question 14

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

Question 15

When water vapor condenses on the inside of a window, the room becomes slightly

Accepted Answer

A)  cooler. 
B)  warmer. 
C)  neither warmer nor cooler. 
A)  cooler. 
B)  warmer. 
C)  neither warmer nor cooler.

Question 16

An inventor discovers a harmless and tasteless salt, which, when added to water changes its boiling point. The market value for this salt will be best if the salt

Accepted Answer

A)  lowers the boiling point of water. 
B)  raises the boiling point of water. 
C)  either raises or lowers the boiling point, as the food would be cooked either way. 
A)  lowers the boiling point of water. 
B)  raises the boiling point of water. 
C)  either raises or lowers the boiling point, as the food would be cooked either way.

Question 17

If you were caught in freezing weather with only a candle for heat, you would be warmer in

Accepted Answer

A)  a tent. 
B)  a wooden house. 
C)  an igloo. 
D)  a car. 
A)  a tent. 
B)  a wooden house. 
C)  an igloo. 
D)  a car.

Question 18

To turn 50 grams of boiling water to steam requires

Accepted Answer

A)  540 calories. 
B)  50 calories. 
C)  500 calories 
D)  more calories than are required to bring 50 grams of ice at absolute zero to the boiling point. 
E)  None of the above choices are correct. 
A)  540 calories. 
B)  50 calories. 
C)  500 calories 
D)  more calories than are required to bring 50 grams of ice at absolute zero to the boiling point. 
E)  None of the above choices are correct.

Question 19

To increase the temperature of 50 grams of water by 2 Celsius degrees requires

Accepted Answer

A)  0.04 calorie. 
B)  25 calories. 
C)  100 calories. 
D)  2 calories. 
E)  4.18 calories. 
A)  0.04 calorie. 
B)  25 calories. 
C)  100 calories. 
D)  2 calories. 
E)  4.18 calories.

Question 20

Wrapping a hot potato in aluminum foil significantly reduces the rate at which it cools by

Accepted Answer

A)  conduction. 
B)  evaporation. 
C)  condensation. 
D)  melting. 
A)  conduction. 
B)  evaporation. 
C)  condensation. 
D)  melting.

An object will normally be a net radiator of energy when its temperature is

When heat is added to boiling water, its temperature

Cold water will warm to room temperature faster in a

When snow forms in clouds, the surrounding air

The planet Earth loses heat mainly by

If molecules in a gas sample moved so they completely missed each other, the gas's temperature would

Warm air rises because faster-moving molecules tend to move to regions of less

A water-filled paper cup held in a flame will not catch fire. This is because

Stored potatoes, beets, and rutabagas in a well-insulated but unheated room can be protected from freezing by having in the room

Which involves the larger number of calories?

A hot dog pants

Increased air pressure on the surface of hot water tends to

Boiling water does not increase in temperature when additional heat is applied because

Waves emitted by the sun and terrestrial wave emissions are

When water vapor condenses on the inside of a window, the room becomes slightly

An inventor discovers a harmless and tasteless salt, which, when added to water changes its boiling point. The market value for this salt will be best if the salt

If you were caught in freezing weather with only a candle for heat, you would be warmer in

To turn 50 grams of boiling water to steam requires

To increase the temperature of 50 grams of water by 2 Celsius degrees requires

Wrapping a hot potato in aluminum foil significantly reduces the rate at which it cools by

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

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Exam 9: Heat Transfer and Change of Phase

An object will normally be a net radiator of energy when its temperature is

When heat is added to boiling water, its temperature

Cold water will warm to room temperature faster in a

When snow forms in clouds, the surrounding air

The planet Earth loses heat mainly by

If molecules in a gas sample moved so they completely missed each other, the gas's temperature would

Warm air rises because faster-moving molecules tend to move to regions of less

A water-filled paper cup held in a flame will not catch fire. This is because

Stored potatoes, beets, and rutabagas in a well-insulated but unheated room can be protected from freezing by having in the room

Which involves the larger number of calories?

A hot dog pants

Increased air pressure on the surface of hot water tends to

Boiling water does not increase in temperature when additional heat is applied because

Waves emitted by the sun and terrestrial wave emissions are

When water vapor condenses on the inside of a window, the room becomes slightly

An inventor discovers a harmless and tasteless salt, which, when added to water changes its boiling point. The market value for this salt will be best if the salt

If you were caught in freezing weather with only a candle for heat, you would be warmer in

To turn 50 grams of boiling water to steam requires

To increase the temperature of 50 grams of water by 2 Celsius degrees requires

Wrapping a hot potato in aluminum foil significantly reduces the rate at which it cools by

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