Question 1

Energy is not conserved when a moving object slows to a stop.

Accepted Answer

A) True 
 B)False

Question 2

When you throw a ball into the air, its kinetic energy

Accepted Answer

A) equals   . 
B) equals the work you did on the ball. 
C) is converted to potential energy as it goes higher. 
D) All of the above. 
A) equals   . 
B) equals the work you did on the ball. 
C) is converted to potential energy as it goes higher. 
D) All of the above.

Question 3

Coal that is used in a coal-fired power plant is

Accepted Answer

A) broken into rice-sized granules and transported on belts. 
B) ground to a face-powder consistency and blown into furnaces. 
C) burned in baseball-sized chunks for a hotter fire. 
D) transported and burned in all sizes of coal chunks. 
A) broken into rice-sized granules and transported on belts. 
B) ground to a face-powder consistency and blown into furnaces. 
C) burned in baseball-sized chunks for a hotter fire. 
D) transported and burned in all sizes of coal chunks.

Question 4

Roughly, what fraction of our nation's current energy needs is supplied by coal?

Accepted Answer

A) 10% 
B) 20% 
C) 40% 
D) 80% 
A) 10% 
B) 20% 
C) 40% 
D) 80%

Question 5

Work is the rate at which you expend energy.

Accepted Answer

A) True 
 B)False

Question 6

The potential energy of a ball on the ground is zero.If the ball is now in the bottom of a hole, its potential energy is

Accepted Answer

A) non existent. 
B) the same as it was on the surface. 
C) negative. 
D) zero. 
A) non existent. 
B) the same as it was on the surface. 
C) negative. 
D) zero.

Question 7

Energy sources used today are mostly in what form of energy?

Accepted Answer

A) electrical 
B) chemical 
C) radiant 
D) nuclear 
A) electrical 
B) chemical 
C) radiant 
D) nuclear

Question 8

An object that falls twice as far will be moving twice as fast when it hits the ground.

Accepted Answer

A) True 
 B)False

Question 9

The increase in potential energy caused by lifting an object can be calculated by multiplying its weight by its change in height.

Accepted Answer

A) True 
 B)False

Question 10

The quantity that has units   is known as a

Accepted Answer

A) joule. 
B) newton. 
C) horsepower. 
D) watt. 
A) joule. 
B) newton. 
C) horsepower. 
D) watt.

Energy is not conserved when a moving object slows to a stop.

When you throw a ball into the air, its kinetic energy

Coal that is used in a coal-fired power plant is

Roughly, what fraction of our nation's current energy needs is supplied by coal?

Work is the rate at which you expend energy.

The potential energy of a ball on the ground is zero.If the ball is now in the bottom of a hole, its potential energy is

Energy sources used today are mostly in what form of energy?

An object that falls twice as far will be moving twice as fast when it hits the ground.

The increase in potential energy caused by lifting an object can be calculated by multiplying its weight by its change in height.

The quantity that has units is known as a

What Is Science

Motion

Heat and Temperature

Wave Motions and Sound

Electricity

Light

Atoms and Periodic Properties

Chemical Bonds

Chemical Reactions

Water and Solutions

Organic Chemistry

Nuclear Reactions

The Universe

The Solar System

Earth in Space

Rocks and Minerals

Plate Tectonics

Building Earths Surface

Shaping Earths Surface

Geologic Time

The Atmosphere of Earth

Weather and Climate

Earths Waters

Filters

Exam 3: Energy

Energy is not conserved when a moving object slows to a stop.

When you throw a ball into the air, its kinetic energy

Coal that is used in a coal-fired power plant is

Roughly, what fraction of our nation's current energy needs is supplied by coal?

Work is the rate at which you expend energy.

The potential energy of a ball on the ground is zero.If the ball is now in the bottom of a hole, its potential energy is

Energy sources used today are mostly in what form of energy?

An object that falls twice as far will be moving twice as fast when it hits the ground.

The increase in potential energy caused by lifting an object can be calculated by multiplying its weight by its change in height.

The quantity that has units is known as a

What Is Science

Motion

Heat and Temperature

Wave Motions and Sound

Electricity

Light

Atoms and Periodic Properties

Chemical Bonds

Chemical Reactions

Water and Solutions

Organic Chemistry

Nuclear Reactions

The Universe

The Solar System

Earth in Space

Rocks and Minerals

Plate Tectonics

Building Earths Surface

Shaping Earths Surface

Geologic Time

The Atmosphere of Earth

Weather and Climate

Earths Waters

Filters