Energy Transfer
Sound energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
Elastic potential
energy
Kinetic energy
Conservation of energy
kon-ser-vey-shun
Energy can neither be created or destroyed during a
transfer of energy.
All
Definition
Recall the 8 common types of energy
Most
Pronunciation
Learning
objectives
Key word
Apply the conservation of energy to a range of appliances
The conservation of energy
When energy is transferred.
energy can not be created or destroyed
60J of light
100J of electrical
40J of heat
The energy transfers in a computer
(What’s missing? What is the useful
and waste energy?)
Electrical energy
( 200 J )
Nintendo DS
Electrical energy
(
)
Energy transfer within a car
8,000 J
Calculating efficiency
Example
25 J
light
TASK
100 J
electrical
75 J
Heat
Move around the room, working out the efficiency
of each of the devices.
Sankey diagrams
10 Joules
electrical
energy
7 squares = 7 joules
3 squares = 3 joules
1 square is 1 joule of energy
Energy splat!
Kinetic energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
Watch this space!
Energy splat! 1
Kinetic energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
What is the
useful
energy ?
Energy splat! 2
Kinetic energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
What is the
useful
energy?
Energy splat! 3
Kinetic energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
What is the useful
energy produced in
the moving air?
Energy splat! 4
Kinetic energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
What type
of energy is
generated
from a wind
turbine?
Energy splat! 7
Kinetic energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
What type
of energy is
generated?
Energy splat! 8
Kinetic energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
What type
of energy is
used up by
the kettle?
Energy splat! 9
Kinetic energy
Sound energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
What type
of energy is
generated?
Energy splat! 11
Kinetic energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
What type
of energy is
stored in the
match?
Energy splat! 12
Kinetic energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
An object high
above the Earth
has lots of this
type of energy!
Energy splat! 13
Kinetic energy
Heat energy
Gravitational potential
energy
Electrical energy
Chemical energy
Light energy
What type of
energy does
coal contain?
Energy splat! 14
100 joules
75%
20%
50 joules
200 joules
1,000 joules
150 J
light
200 J
in
What is the
efficiency
50 J
in
Energy splat! 15
100 joules
25 joules
20%
50 joules
200 joules
1,000 joules
300j
light
500j
in
How much
waste
energy?
?? j
waste