Question 1

Ice floats in water because

Accepted Answer

A)  its density is less than that of water. 
B)  its specific heat is less than that of water. 
C)  it is a solid whereas water is a liquid. 
D)  it is colder than water. 
A)  its density is less than that of water. 
B)  its specific heat is less than that of water. 
C)  it is a solid whereas water is a liquid. 
D)  it is colder than water.

Question 2

Heat transfer by conduction occurs

Accepted Answer

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

Question 3

One liter of hydrogen gas at atmospheric pressure is allowed to expand to a volume of 3 liters with the temperature held constant. If the average speed of the hydrogen molecules was originally v, their new average speed is

Accepted Answer

A)  v/9. 
B)  v/3. 
C)  v. 
D)  3 v. 
A)  v/9. 
B)  v/3. 
C)  v. 
D)  3 v.

Question 4

An ideal frictionless engine takes in 10 kJ of heat per second when it operates between 500 K and 400 K. The work that the engine does per second is

Accepted Answer

A)  2 kJ. 
B)  2.5 kJ. 
C)  8 kJ. 
D)  10 kJ. 
A)  2 kJ. 
B)  2.5 kJ. 
C)  8 kJ. 
D)  10 kJ.

Question 5

The average pressure of the atmosphere at sea level corresponds to which one or more of the following?

Accepted Answer

A)  101 Pa 
B)  101 kPa 
C)  98 kPa 
D)  15 lb/in2 
E)  Both B and D 
A)  101 Pa 
B)  101 kPa 
C)  98 kPa 
D)  15 lb/in2 
E)  Both B and D

Ice floats in water because

Heat transfer by conduction occurs

One liter of hydrogen gas at atmospheric pressure is allowed to expand to a volume of 3 liters with the temperature held constant. If the average speed of the hydrogen molecules was originally v, their new average speed is

An ideal frictionless engine takes in 10 kJ of heat per second when it operates between 500 K and 400 K. The work that the engine does per second is

The average pressure of the atmosphere at sea level corresponds to which one or more of the following?

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

Exam 5: Matter and Heat

Ice floats in water because

Heat transfer by conduction occurs

One liter of hydrogen gas at atmospheric pressure is allowed to expand to a volume of 3 liters with the temperature held constant. If the average speed of the hydrogen molecules was originally v, their new average speed is

An ideal frictionless engine takes in 10 kJ of heat per second when it operates between 500 K and 400 K. The work that the engine does per second is

The average pressure of the atmosphere at sea level corresponds to which one or more of the following?

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