Question 1

Suppose there were molecules that had no attraction whatsoever for one another. A collection of such molecules would form a

Accepted Answer

A)  gas. 
B)  liquid. 
C)  amorphous solid. 
D)  crystalline solid. 
A)  gas. 
B)  liquid. 
C)  amorphous solid. 
D)  crystalline solid. A

Question 2

Of the following, a molecule is best described as

Accepted Answer

A)  any very tiny particle. 
B)  the smallest particle found in nature. 
C)  the smallest particle of a substance that is representative of the substance. 
D)  the ultimate particle of which all matter is composed. 
A)  any very tiny particle. 
B)  the smallest particle found in nature. 
C)  the smallest particle of a substance that is representative of the substance. 
D)  the ultimate particle of which all matter is composed. C

Question 3

At which of the following Celsius temperatures will a Fahrenheit thermometer show the same reading in degrees?

Accepted Answer

A)  -40$\degree$C 
B)  0$\degree$C 
C)  32$\degree$C 
D)  40$\degree$C 
A)  -40$\degree$C 
B)  0$\degree$C 
C)  32$\degree$C 
D)  40$\degree$C A

Question 4

In order to double the average energy of the molecules in a gas at 200 K, its temperature must be changed to

Accepted Answer

A)  100 K. 
B)  400 K. 
C)  800 K. 
D)  1600 K. 
A)  100 K. 
B)  400 K. 
C)  800 K. 
D)  1600 K.

Question 5

A cake of soap is placed in a bathtub sink. The buoyant force on the soap is

Accepted Answer

A)  0. 
B)  less than its weight. 
C)  equal to its weight. 
D)  more than its weight. 
A)  0. 
B)  less than its weight. 
C)  equal to its weight. 
D)  more than its weight.

Question 6

If it is to be 40 percent efficient, a heat engine that exhausts heat at 350 K must absorb heat at a minimum temperature of

Accepted Answer

A)  210 K. 
B)  583 K. 
C)  875 K. 
D)  1038 K. 
A)  210 K. 
B)  583 K. 
C)  875 K. 
D)  1038 K.

Question 7

The density of air is 1.3 kg/m3. The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of

Accepted Answer

A)  0.26 kg. 
B)  6.5 kg. 
C)  38 kg. 
D)  65 kg. 
A)  0.26 kg. 
B)  6.5 kg. 
C)  38 kg. 
D)  65 kg.

Question 8

Of the substances below, the one with the highest specific heat is

Accepted Answer

A)  water. 
B)  ice. 
C)  concrete. 
D)  gold. 
A)  water. 
B)  ice. 
C)  concrete. 
D)  gold.

Question 9

The maximum possible efficiency of a heat engine

Accepted Answer

A)  is 100%. 
B)  depends on the intake temperature. 
C)  depends on the difference between the exhaust and intake temperatures. 
D)  depends on the ratio between the exhaust and intake temperatures. 
A)  is 100%. 
B)  depends on the intake temperature. 
C)  depends on the difference between the exhaust and intake temperatures. 
D)  depends on the ratio between the exhaust and intake temperatures.

Question 10

The "heat death" of the universe refers to a possible (although improbable) future in which all of its molecules are

Accepted Answer

A)  at rest. 
B)  as close together as possible 
C)  moving in the same direction 
D)  moving with the same average speed 
A)  at rest. 
B)  as close together as possible 
C)  moving in the same direction 
D)  moving with the same average speed

Question 11

The properties of several different materials are being compared. If the samples all have the same volume, the one with the greatest mass also has the greatest

Accepted Answer

A)  density. 
B)  buoyancy. 
C)  pressure. 
D)  temperature. 
A)  density. 
B)  buoyancy. 
C)  pressure. 
D)  temperature.

Question 12

A heat engine absorbs heat at 127$\degree$C and exhausts heat at 77$\degree$C. Its maximum efficiency is

Accepted Answer

A)  13 percent. 
B)  39 percent. 
C)  61 percent. 
D)  88 percent. 
A)  13 percent. 
B)  39 percent. 
C)  61 percent. 
D)  88 percent.

Question 13

When a gas is forced into a smaller volume without a change in temperature, its pressure increases because its molecules

Accepted Answer

A)  strike the container walls more often. 
B)  strike the container walls at higher speeds. 
C)  strike the container walls with greater force. 
D)  have more energy. 
A)  strike the container walls more often. 
B)  strike the container walls at higher speeds. 
C)  strike the container walls with greater force. 
D)  have more energy.

Question 14

The specific heat of ice is 2.1 kJ/kg$\degree$C. When 50 kJ of heat is removed from 2 kg of ice initially at -5$\degree$C, the final temperature of the ice is

Accepted Answer

A)  -6$\degree$C. 
B)  -11$\degree$C. 
C)  -12$\degree$C. 
D)  -17$\degree$C. 
A)  -6$\degree$C. 
B)  -11$\degree$C. 
C)  -12$\degree$C. 
D)  -17$\degree$C.

Question 15

The pressure on the bottom of an object inside a liquid is

Accepted Answer

A)  less than the pressure on its top. 
B)  equal to the pressure on its top. 
C)  more than the pressure on its top. 
D)  Any of these choices, depending on the nature of the liquid. 
A)  less than the pressure on its top. 
B)  equal to the pressure on its top. 
C)  more than the pressure on its top. 
D)  Any of these choices, depending on the nature of the liquid.

Question 16

Heat transfer by convection occurs

Accepted Answer

A)  only in liquids. 
B)  only in gases. 
C)  only in liquids and gases. 
D)  in liquids, gases, and solids. 
A)  only in liquids. 
B)  only in gases. 
C)  only in liquids and gases. 
D)  in liquids, gases, and solids.

Question 17

A 400-kg concrete block is 1 m long, 0.6 m wide, and 0.3 m high. Its density is

Accepted Answer

A)  72 kg/m. 
B)  222 kg/m. 
C)  667 kg/m. 
D)  2222 kg/m. 
A)  72 kg/m. 
B)  222 kg/m. 
C)  667 kg/m. 
D)  2222 kg/m.

Question 18

In order for an object to sink when placed in water, the object's average density must be

Accepted Answer

A)  less than that of water. 
B)  equal to that of water. 
C)  more than that of water. 
D)  Any of these choices are correct, depending on the object's shape. 
A)  less than that of water. 
B)  equal to that of water. 
C)  more than that of water. 
D)  Any of these choices are correct, depending on the object's shape.

Question 19

A thermometer calibrated in the Celsius scale and a thermometer calibrated in the Fahrenheit scale are used to measure the same temperature. The numerical reading on the Fahrenheit thermometer

Accepted Answer

A)  is proportional to that on the Celsius thermometer. 
B)  is smaller than that on the Celsius thermometer. 
C)  is larger than that on the Celsius thermometer. 
D)  may be smaller or larger than that on the Celsius thermometer. 
A)  is proportional to that on the Celsius thermometer. 
B)  is smaller than that on the Celsius thermometer. 
C)  is larger than that on the Celsius thermometer. 
D)  may be smaller or larger than that on the Celsius thermometer.

Question 20

An absolute temperature of 100 K is the same as a Celsius temperature of

Accepted Answer

A)  -173$\degree$C. 
B)  32$\degree$C. 
C)  212$\degree$C. 
D)  373$\degree$C. 
A)  -173$\degree$C. 
B)  32$\degree$C. 
C)  212$\degree$C. 
D)  373$\degree$C.

Suppose there were molecules that had no attraction whatsoever for one another. A collection of such molecules would form a

Of the following, a molecule is best described as

At which of the following Celsius temperatures will a Fahrenheit thermometer show the same reading in degrees?

In order to double the average energy of the molecules in a gas at 200 K, its temperature must be changed to

A cake of soap is placed in a bathtub sink. The buoyant force on the soap is

If it is to be 40 percent efficient, a heat engine that exhausts heat at 350 K must absorb heat at a minimum temperature of

The density of air is 1.3 kg/m³. The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of

Of the substances below, the one with the highest specific heat is

The maximum possible efficiency of a heat engine

The "heat death" of the universe refers to a possible (although improbable) future in which all of its molecules are

The properties of several different materials are being compared. If the samples all have the same volume, the one with the greatest mass also has the greatest

A heat engine absorbs heat at 127 $\degree$ C and exhausts heat at 77 $\degree$ C. Its maximum efficiency is

When a gas is forced into a smaller volume without a change in temperature, its pressure increases because its molecules

The specific heat of ice is 2.1 kJ/kg $\degree$ C. When 50 kJ of heat is removed from 2 kg of ice initially at -5 $\degree$ C, the final temperature of the ice is

The pressure on the bottom of an object inside a liquid is

Heat transfer by convection occurs

A 400-kg concrete block is 1 m long, 0.6 m wide, and 0.3 m high. Its density is

In order for an object to sink when placed in water, the object's average density must be

A thermometer calibrated in the Celsius scale and a thermometer calibrated in the Fahrenheit scale are used to measure the same temperature. The numerical reading on the Fahrenheit thermometer

An absolute temperature of 100 K is the same as a Celsius temperature of

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Exam 5: Matter and Heat

Suppose there were molecules that had no attraction whatsoever for one another. A collection of such molecules would form a

Of the following, a molecule is best described as

At which of the following Celsius temperatures will a Fahrenheit thermometer show the same reading in degrees?

In order to double the average energy of the molecules in a gas at 200 K, its temperature must be changed to

A cake of soap is placed in a bathtub sink. The buoyant force on the soap is

If it is to be 40 percent efficient, a heat engine that exhausts heat at 350 K must absorb heat at a minimum temperature of

The density of air is 1.3 kg/m3. The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of

Of the substances below, the one with the highest specific heat is

The maximum possible efficiency of a heat engine

The "heat death" of the universe refers to a possible (although improbable) future in which all of its molecules are

The properties of several different materials are being compared. If the samples all have the same volume, the one with the greatest mass also has the greatest

A heat engine absorbs heat at 127 °\degree° C and exhausts heat at 77 °\degree° C. Its maximum efficiency is

When a gas is forced into a smaller volume without a change in temperature, its pressure increases because its molecules

The specific heat of ice is 2.1 kJ/kg °\degree° C. When 50 kJ of heat is removed from 2 kg of ice initially at -5 °\degree° C, the final temperature of the ice is

The pressure on the bottom of an object inside a liquid is

Heat transfer by convection occurs

A 400-kg concrete block is 1 m long, 0.6 m wide, and 0.3 m high. Its density is

In order for an object to sink when placed in water, the object's average density must be

A thermometer calibrated in the Celsius scale and a thermometer calibrated in the Fahrenheit scale are used to measure the same temperature. The numerical reading on the Fahrenheit thermometer

An absolute temperature of 100 K is the same as a Celsius temperature of

The Scientific Method

Motion

Energy

Energy and the Future

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

The Universe Galaxies

Filters

The density of air is 1.3 kg/m³. The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of

A heat engine absorbs heat at 127 $\degree$ C and exhausts heat at 77 $\degree$ C. Its maximum efficiency is

The specific heat of ice is 2.1 kJ/kg $\degree$ C. When 50 kJ of heat is removed from 2 kg of ice initially at -5 $\degree$ C, the final temperature of the ice is