Question 1

In a mixture of hydrogen gas, oxygen gas, and nitrogen gas, the molecules with the greatest average speed are those of

Accepted Answer

A)  nitrogen. 
B)  hydrogen. 
C)  oxygen. 
D)  All will have the same average speed at the same temperature. 
A)  nitrogen. 
B)  hydrogen. 
C)  oxygen. 
D)  All will have the same average speed at the same temperature.

Question 2

Suppose you want to save energy and you're going to leave your cool house for a half hour on a hot day. You should turn the temperature setting on the air conditioner

Accepted Answer

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

Question 3

Objects that radiate relatively well,

Accepted Answer

A)  absorb radiation relatively well. 
B)  reflect radiation relatively well. 
C)  both of these 
D)  neither of these 
A)  absorb radiation relatively well. 
B)  reflect radiation relatively well. 
C)  both of these 
D)  neither of these

Question 4

Evaporation is a cooling process because

Accepted Answer

A)  heat is radiated during the process. 
B)  the temperature of the remaining liquid decreases. 
C)  of conduction and convection. 
D)  the more energetic molecules are able to escape the liquid. 
E)  none of these 
A)  heat is radiated during the process. 
B)  the temperature of the remaining liquid decreases. 
C)  of conduction and convection. 
D)  the more energetic molecules are able to escape the liquid. 
E)  none of these

Question 5

Melting snow

Accepted Answer

A)  warms the surrounding air. 
B)  cools the surrounding air. 
C)  neither warms nor cools the surrounding air. 
A)  warms the surrounding air. 
B)  cools the surrounding air. 
C)  neither warms nor cools the surrounding air.

Question 6

The higher the temperature of an object,

Accepted Answer

A)  the longer the wavelengths it radiates. 
B)  the shorter the wavelengths it radiates. 
C)  makes no difference in the wavelengths it radiates 
A)  the longer the wavelengths it radiates. 
B)  the shorter the wavelengths it radiates. 
C)  makes no difference in the wavelengths it radiates

Question 7

When bringing water to a boil in the mountains, the time needed to reach the boiling point is

Accepted Answer

A)  less than at sea level. 
B)  more than at sea level. 
C)  the same as at sea level. 
A)  less than at sea level. 
B)  more than at sea level. 
C)  the same as at sea level.

Question 8

When a gas is changed to a liquid state, the gas

Accepted Answer

A)  releases energy. 
B)  absorbs energy. 
C)  neither releases nor absorbs energy. 
D)  both releases and absorbs energy. 
A)  releases energy. 
B)  absorbs energy. 
C)  neither releases nor absorbs energy. 
D)  both releases and absorbs energy.

Question 9

A good reflector of radiation is

Accepted Answer

A)  good emitter of radiation. 
B)  poor absorber of radiation. 
C)  good absorber of radiation. 
D)  none of these 
A)  good emitter of radiation. 
B)  poor absorber of radiation. 
C)  good absorber of radiation. 
D)  none of these

Question 10

One of the main reasons one can walk barefoot on red-hot coals of wood without burning the feet has to do with

Accepted Answer

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

Question 11

If a volume of air is warmed, it expands. If a volume of air expands, it

Accepted Answer

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

Question 12

Firefighters find that the temperature of burning material is best lowered when water is

Accepted Answer

A)  pointed away from the flames. 
B)  salted. 
C)  sprayed as a fine mist. 
D)  used in small amounts. 
A)  pointed away from the flames. 
B)  salted. 
C)  sprayed as a fine mist. 
D)  used in small amounts.

Question 13

Suppose you want to save energy and you're going to leave your warm house for a half hour on a cold day. You should turn the thermostat

Accepted Answer

A)  down. 
B)  up. 
C)  to room temperature. 
A)  down. 
B)  up. 
C)  to room temperature.

Question 14

To melt 50 grams of 0-degree-Celsius ice requires

Accepted Answer

A)  50 calories. 
B)  80 calories. 
C)  25 calories. 
D)  none of these 
A)  50 calories. 
B)  80 calories. 
C)  25 calories. 
D)  none of these

Question 15

Both black and white road surfaces radiate energy. At the end of a starry night the warmer road surface will be

Accepted Answer

A)  the white surface. 
B)  the black surface. 
C)  neither-there is no difference. 
A)  the white surface. 
B)  the black surface. 
C)  neither-there is no difference.

Question 16

Hot water has a relatively high rate of

Accepted Answer

A)  convection. 
B)  conductivity. 
C)  condensation. 
D)  evaporation. 
A)  convection. 
B)  conductivity. 
C)  condensation. 
D)  evaporation.

Question 17

Increase the pressure in a container of oxygen gas while keeping the temperature constant and you increase the

Accepted Answer

A)  molecular kinetic energy. 
B)  molecular speed. 
C)  Choice A and choice B are both true. 
D)  Neither choice A or choice B is true. 
A)  molecular kinetic energy. 
B)  molecular speed. 
C)  Choice A and choice B are both true. 
D)  Neither choice A or choice B is true.

Question 18

The minimum amount of 100-degree-C steam needed to melt 1 gram of 0-degree-Celsius ice is

Accepted Answer

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

Question 19

At the same temperature, which move with the greater speed in the air?

Accepted Answer

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

Question 20

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

Accepted Answer

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

In a mixture of hydrogen gas, oxygen gas, and nitrogen gas, the molecules with the greatest average speed are those of

Suppose you want to save energy and you're going to leave your cool house for a half hour on a hot day. You should turn the temperature setting on the air conditioner

Objects that radiate relatively well,

Evaporation is a cooling process because

Melting snow

The higher the temperature of an object,

When bringing water to a boil in the mountains, the time needed to reach the boiling point is

When a gas is changed to a liquid state, the gas

A good reflector of radiation is

One of the main reasons one can walk barefoot on red-hot coals of wood without burning the feet has to do with

If a volume of air is warmed, it expands. If a volume of air expands, it

Firefighters find that the temperature of burning material is best lowered when water is

Suppose you want to save energy and you're going to leave your warm house for a half hour on a cold day. You should turn the thermostat

To melt 50 grams of 0-degree-Celsius ice requires

Both black and white road surfaces radiate energy. At the end of a starry night the warmer road surface will be

Hot water has a relatively high rate of

Increase the pressure in a container of oxygen gas while keeping the temperature constant and you increase the

The minimum amount of 100-degree-C steam needed to melt 1 gram of 0-degree-Celsius ice is

At the same temperature, which move with the greater speed in the air?

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

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Fluid Mechanics

Temperature, Heat, and Thermodynamics

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Magnetism and Electromagnetic Induction

Waves and Sound

Light Waves

Properties of Light

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Exam 9: Heat Transfer and Change of Phase

In a mixture of hydrogen gas, oxygen gas, and nitrogen gas, the molecules with the greatest average speed are those of

Suppose you want to save energy and you're going to leave your cool house for a half hour on a hot day. You should turn the temperature setting on the air conditioner

Objects that radiate relatively well,

Evaporation is a cooling process because

Melting snow

The higher the temperature of an object,

When bringing water to a boil in the mountains, the time needed to reach the boiling point is

When a gas is changed to a liquid state, the gas

A good reflector of radiation is

One of the main reasons one can walk barefoot on red-hot coals of wood without burning the feet has to do with

If a volume of air is warmed, it expands. If a volume of air expands, it

Firefighters find that the temperature of burning material is best lowered when water is

Suppose you want to save energy and you're going to leave your warm house for a half hour on a cold day. You should turn the thermostat

To melt 50 grams of 0-degree-Celsius ice requires

Both black and white road surfaces radiate energy. At the end of a starry night the warmer road surface will be

Hot water has a relatively high rate of

Increase the pressure in a container of oxygen gas while keeping the temperature constant and you increase the

The minimum amount of 100-degree-C steam needed to melt 1 gram of 0-degree-Celsius ice is

At the same temperature, which move with the greater speed in the air?

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

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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