Energy Transformations

Question 1

Roller coaster goes down hill. PE --> KE, TE & SE. What's true about total energy of system?

Accepted Answer

total energy remains the same as roller coaster moves

Question 2

Candle wax has stored CE. As candle burns, wax changes form. What happens to CE in candle wax?

Accepted Answer

it transforms into heat energy

Question 3

What device could be added to an electrical circuit to convert electrical into sound energy

Accepted Answer

a speaker

Question 4

Pick the true statement

Accepted Answer

All magnets have a north and south pole

Question 5

Which statement describes the Law of Conservation of Energy?

Accepted Answer

Energy is neither created nor destroyed

Question 6

Which best illustrates the Law of Conservation of Energy

Accepted Answer

A log burns, chemical energy is transformed to heat & light

Question 7

Look at the picture & choose the correct energy conversion taking place, beginning with battery

Accepted Answer

stored chemical ---> electrical to light and heat

Question 8

Automobile engine converts chemical energy in gasoline mostly into heat and

Accepted Answer

mechanical energy

Question 9

Energy conversion in TV speaker producing music

Accepted Answer

electrical energy to sound and light energy

Question 10

Your TV uses energy. What happens when you turn on the TV?

Accepted Answer

energy changes form

Question 11

Which energy transformed best describes how a battery operated car moves forward?

Accepted Answer

chemical --> electrical ---> mechanical

Question 12

What isn't a way that a magnet can be damaged?

Accepted Answer

spinning

Question 13

At what point will the roller coaster car have the least GPE and the most KE?

Accepted Answer

c

Question 14

At which point in its swing does the pendulum have the least kinetic energy?

Accepted Answer

1

Question 15

Which location shows the rock with the greatest potential energy?

Accepted Answer

3

Question 16

Ball falls & loses 4.2 Joules of GPE. GPE is then converted to KE. How much KE does ball gain?

Accepted Answer

4.2 J

Question 17

What energy conversion happens when an alarm clock goes off?

Accepted Answer

chemical energy --> electrical energy --> sound energy

Question 18

What type of energy will be the greatest at the top of the hill?

Accepted Answer

gravitational potential energy

Question 19

Energy conversion when wood is burned.

Accepted Answer

chemical energy ----> light energy and thermal energy

Question 20

The mechanical energy needed to bend the ruler is being transformed into ________.

Accepted Answer

elastic potential energy

Question 21

Which of these most likely happens as the acrobat moves from Point 1 to Point 2?

Accepted Answer

Potential energy decreases and kinetic energy increases

Question 22

What does the diagram illustrate?

Accepted Answer

Law of Conservation of Energy

Question 23

What energy conversion do solar panels carry out?

Accepted Answer

light energy --> electrical energy

Question 24

At which point is the kinetic energy of the ball greatest and its potential energy least?

Accepted Answer

D

Question 25

Which of these describes the energy of an object in motion?

Accepted Answer

Kinetic Energy

Question 26

Energy Conversion in Gasoline: Gasoline converts 15% of chemical energy into mechanical.

Accepted Answer

chemical to thermal

Question 27

Campers build a campfire. What energy transformation takes place as the logs burn?

Accepted Answer

chemical energy is transformed into light energy

Question 28

A Tennis ball rolling on a flat surface stops. What causes the ball to lose all kinetic energy?

Accepted Answer

friction

Question 29

Which best describes how the energy of the diver changed from point 1 to point 2?

Accepted Answer

Potential energy decreased and kinetic energy increased

Question 30

What is the best example of chemical potential energy being converted into thermal energy?

Accepted Answer

coal burning on a grill

Question 31

According to Law of Conservation of Energy, the energy exchanged between battery & flashlight _

Accepted Answer

changes form

Question 32

Which type of energy is being converted into kinetic energy as a marble falls from a shelf?

Accepted Answer

gravitational potential energy

Question 33

Complete the Energy Conversion: ______ ---->Fireworks release heat, light and sound.

Accepted Answer

chemical potential energy

Question 34

Name the energy conversion: A person rubbing their hands together rapidly

Accepted Answer

kineticl energy to heat energy

Question 35

Which statement is true about magnets?

Accepted Answer

The poles on a magnet are the strongest point.

Question 36

What energy conversion takes place when an oven is in use?

Accepted Answer

electrical energy --> heat and light

Question 37

Which of these best describes the energy of an object in motion?

Accepted Answer

kinetic energy

Question 38

Amount of LE released by light bulb is less than amount of energy that flows into lamp. Why?

Accepted Answer

Some electrical energy is converted to heat

Question 39

Which energy conversion is illustrated in the diagram?

Accepted Answer

gravitational potential energy to kinetic energy

Question 40

At which point is the kinetic energy the greatest?

Accepted Answer

y

Energy Transformations

Questions 40

Energy Transformations

Questions 40