Energy

Question 0

What is potential energy?

Answer 0

Stored energy that when released is converted to other forms such as kinetic, sound, heat or light energy

Question 1

What are the types of energy?

Answer 1

POTENTIAL ENERGY:
-Gravitational
-Elastic
-Chemical
-Nuclear
-Electrical
OTHER TYPES:
-Kinetic
-Heat
-Light
-Sound

Question 2

Give an example of all the types of energy.

Answer 2

Gravitational: high jump
Elastic: trampoline
Chemical: match box + matches
Nuclear: nuclear bomb
Electrical: electric from power stations
Kinetic: car
Heat: heater
Light: lightbulb
Sound: headphones

Question 3

Define energy.

Answer 3

The ability to do work.

Question 4

What unit is energy measured in?

Answer 4

Joules

Question 5

How is gravitational potential energy calculated?

Answer 5

gravitational potential energy=mgh
M-mass (kg)
G-gravitational acceleration (10m/s2 on Earth)
H-vertical height (mtrs)
m × g × h = \_\_ joules/kilojoules

Question 6

How many joules are there in one kilojoule?

Answer 6

1000

Question 7

How is kinetic energy calculated?

Answer 7

Kinetic Energy=1/2mv2
M-mass (kg)
V-speed (m/s)
1/2 × m × (v)2 = __ joules/kilojoules

Question 8

Can energy be transferred from one object to another or the surrounding environment?

Answer 8

Yes

Question 9

Give an example of how energy is transformed into other forms of energy.

Answer 9

Trampoline:
At the Top - GPE
Coming Down - GPE > KE
Landing - GPE + KE > EPE
Pushing Off - EPE > KE + GPE
Rising - KE > GPE
Starts over again.

Question 10

Is temperature and heat the same thing?

Answer 10

No

Question 11

What helps keep heat spread evenly?

Answer 11

Conductors

Question 12

How can heat travel through objects?

Answer 12

By conduction.

Question 13

What are insulators?

Answer 13

Materials that conduct heat and electricity poorly.

Question 14

What can we not do with energy?

Answer 14

Create or destroy it.