Question 1

A 1-N weight has a KE of 1 J when its speed is

Accepted Answer

A) 0.45 m/s. 
B) 1 m/s. 
C) 1.4 m/s. 
D) 4.4 m/s. 
A) 0.45 m/s. 
B) 1 m/s. 
C) 1.4 m/s. 
D) 4.4 m/s.

Question 2

If a spaceship 100 m long when at rest on the earth were to travel at nine-tenths the speed of light, its length as measured by an observer on the earth would be

Accepted Answer

A) 0. 
B) less than 100 m. 
C) 100 m. 
D) more than 100 m. 
A) 0. 
B) less than 100 m. 
C) 100 m. 
D) more than 100 m.

Question 3

The linear momentum of a 400-kg giraffe galloping at 5 m/s is

Accepted Answer

A) 80 kgm/s. 
B) 2000 kgm/s. 
C) 5000 kgm/s. 
D) 19,600 kgm/s. 
A) 80 kgm/s. 
B) 2000 kgm/s. 
C) 5000 kgm/s. 
D) 19,600 kgm/s.

Question 4

What never changes when two or more objects collide is

Accepted Answer

A) the momentum of each object. 
B) the kinetic energy of each object. 
C) the total momentum of all the objects. 
D) the total kinetic energy of all the objects. 
A) the momentum of each object. 
B) the kinetic energy of each object. 
C) the total momentum of all the objects. 
D) the total kinetic energy of all the objects.

Question 5

The KE of a 900-kg car whose speed is 60 km/h is

Accepted Answer

A) 12.8 kJ. 
B) 125 kJ. 
C) 1.23 MJ. 
D) 1.62 MJ. 
A) 12.8 kJ. 
B) 125 kJ. 
C) 1.23 MJ. 
D) 1.62 MJ.

Question 6

An object that has linear momentum must also have

Accepted Answer

A) acceleration. 
B) angular momentum. 
C) kinetic energy. 
D) potential energy. 
A) acceleration. 
B) angular momentum. 
C) kinetic energy. 
D) potential energy.

Question 7

Which of the following quantities is always the same to all observers?

Accepted Answer

A) Time intervals. 
B) The speed of an object. 
C) The speed of sound. 
D) The speed of light. 
A) Time intervals. 
B) The speed of an object. 
C) The speed of sound. 
D) The speed of light.

Question 8

A 90-kg llama has an average power output of 80 W.The minimum time the llama can go up a hill 500 m high is

Accepted Answer

A) 9.4 min. 
B) 46 min. 
C) 1.5 h. 
D) 9.2 h. 
A) 9.4 min. 
B) 46 min. 
C) 1.5 h. 
D) 9.2 h.

Question 9

When a ton of coal burns, it loses 3.3 * 10-7 kg of mass.The energy given off is

Accepted Answer

A) 3.7 * 10-24 J. 
B) 3.3 * 10-7 J. 
C) 100 J. 
D) 3.0 * 1010 J. 
A) 3.7 * 10-24 J. 
B) 3.3 * 10-7 J. 
C) 100 J. 
D) 3.0 * 1010 J.

A 1-N weight has a KE of 1 J when its speed is

If a spaceship 100 m long when at rest on the earth were to travel at nine-tenths the speed of light, its length as measured by an observer on the earth would be

The linear momentum of a 400-kg giraffe galloping at 5 m/s is

What never changes when two or more objects collide is

The KE of a 900-kg car whose speed is 60 km/h is

An object that has linear momentum must also have

Which of the following quantities is always the same to all observers?

A 90-kg llama has an average power output of 80 W.The minimum time the llama can go up a hill 500 m high is

When a ton of coal burns, it loses 3.3 * 10^-7 kg of mass.The energy given off is

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Exam 3: Energy

A 1-N weight has a KE of 1 J when its speed is

If a spaceship 100 m long when at rest on the earth were to travel at nine-tenths the speed of light, its length as measured by an observer on the earth would be

The linear momentum of a 400-kg giraffe galloping at 5 m/s is

What never changes when two or more objects collide is

The KE of a 900-kg car whose speed is 60 km/h is

An object that has linear momentum must also have

Which of the following quantities is always the same to all observers?

A 90-kg llama has an average power output of 80 W.The minimum time the llama can go up a hill 500 m high is

When a ton of coal burns, it loses 3.3 * 10-7 kg of mass.The energy given off is

The Scientific Method

Motion

Energy and the Future

Matter and Heat

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

Filters

When a ton of coal burns, it loses 3.3 * 10^-7 kg of mass.The energy given off is