UNIT 4 EXAM

What does the Law of conservation of Energy state?

• Energy cannot be created, but can be destroyed as it transforms

• Energy can be created and lost as it converts to other forms

• Energy can be created and destroyed as it converts to other forms

• Energy can not be created or destroyed, only transformed to other forms

What form of energy is ALWAYS produced in an energy conversion?

• Thermal Energy

• Nuclear Energy

• Radiant Energy

• Electrical Energy

How would you describe the relationship between the mass of a car and its kinetic energy?

• As the mass of the car increases, its kinetic energy increase

• As the mass of the car increases, its kinetic energy decreases

• As the mass of the car decreases, its kinetic energy increases

• As the mass of the car decreases, its kinetic energy decreases

When a car is traveling uphill, what energy conversion is occurring?

• Kinetic to Potential

• Potential to Kinetic

• Potential to Potential

• Kinetic to Kinetic

In the figure above, potential energy is being converted into kinetic energy from

• Point A to Point B

• Point B to Point C

• The only energy involved here is kinetic

• Energy is not being converted

As the temperature of a substance rises from 20 degrees C to 50 degrees C, the substance ________heat and its kinetic energy __________.

• Absorbs; increases

• Absorbs; remains constant

• Release; increases

• remains constant; increases

Consider the pendulum. At what point is the kinetic energy the greatest?

• A

• B

• C

• D

A ball is projected into the air. Where is the potential energy the greatest?

• A

• B

• C

• A and C

A drawn bow possess mechanical energy in the form of _____. After the arrow is released, the energy is transformed into ________.

• Potential energy; Mechanical Energy

• Elastic Potential; Kinetic Energy

• Gravitational Potential; Kinetic Energy

• Elastic Kinetic; Mechanical Kinetic

Determine which heat transfer below is due to the process of conduction.

1) You walk barefoot on the hot street, burning your feet.

2) When you get in the car in the summer and the seats burn your skin

3) A flame heats the air inside a hot air balloon and the balloon rises

4) A boy sits to the side of a campfire and gets hot!

• 1 and 2

• 2 and 3

• 1 and 4

• 1, 2, and 4