energy transfer - cgrahamphysics.files.wordpress.com€¦ · energy. this dissipated energy is too...
TRANSCRIPT
ENERGY TRANSFER How is energy changing
08012016 copy cgrahamphysicscom 2016
Aim
bull To identify energy transfers
bull To identify waste energy
Starter Discuss these questions
Fire Breathing (Corn Flour) - YouTube [360p]mp4
bull What happens to energy when it is used
bull What energy transfers are occurring
bull What energy changes can you think off
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Energy makes things happen
When things happen an energy
change takes place
One of the most important forms
of energy is electrical energy
Electrical Heat and Light
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy can change to
light energy sound energy
heat energy kinetic (movement) energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy comes from
chemical energy in the
fossil fuels used in
power stations
kinetic energy in
dynamos
light energy in
solar cells
chemical energy stored
in batteries
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy helps move energy from
one place to another
Most power stations
use fossil fuels to
make electricity
which is transmitted
through cables
which we can then
use in our homes
stored chemical energy electrical energy
light energy (or sound
movement or heat
energy)
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
There are chemicals inside each of the batteries
chemical energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
When the torch is switched on energy from the batteries is carried
round an electrical circuit and lights up the bulb
chemical energy electrical energy light energy
08012016 copy cgrahamphysicscom 2016
Wasted energy Whenever energy is changed from one form to another some energy is
always wasted
Energy is usually wasted as
All electrical devices produce a small amount of heat energy which is
normally wasted
heat energy
sound energy
08012016 copy cgrahamphysicscom 2016
Wasted sound energy If you can hear a device that is not designed to make noise then energy is wasted
as sound
Examples of devices that waste energy as sound include
washing
machine
car engine
hairdryer
jet engine
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
Aim
bull To identify energy transfers
bull To identify waste energy
Starter Discuss these questions
Fire Breathing (Corn Flour) - YouTube [360p]mp4
bull What happens to energy when it is used
bull What energy transfers are occurring
bull What energy changes can you think off
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Energy makes things happen
When things happen an energy
change takes place
One of the most important forms
of energy is electrical energy
Electrical Heat and Light
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy can change to
light energy sound energy
heat energy kinetic (movement) energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy comes from
chemical energy in the
fossil fuels used in
power stations
kinetic energy in
dynamos
light energy in
solar cells
chemical energy stored
in batteries
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy helps move energy from
one place to another
Most power stations
use fossil fuels to
make electricity
which is transmitted
through cables
which we can then
use in our homes
stored chemical energy electrical energy
light energy (or sound
movement or heat
energy)
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
There are chemicals inside each of the batteries
chemical energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
When the torch is switched on energy from the batteries is carried
round an electrical circuit and lights up the bulb
chemical energy electrical energy light energy
08012016 copy cgrahamphysicscom 2016
Wasted energy Whenever energy is changed from one form to another some energy is
always wasted
Energy is usually wasted as
All electrical devices produce a small amount of heat energy which is
normally wasted
heat energy
sound energy
08012016 copy cgrahamphysicscom 2016
Wasted sound energy If you can hear a device that is not designed to make noise then energy is wasted
as sound
Examples of devices that waste energy as sound include
washing
machine
car engine
hairdryer
jet engine
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Energy makes things happen
When things happen an energy
change takes place
One of the most important forms
of energy is electrical energy
Electrical Heat and Light
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy can change to
light energy sound energy
heat energy kinetic (movement) energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy comes from
chemical energy in the
fossil fuels used in
power stations
kinetic energy in
dynamos
light energy in
solar cells
chemical energy stored
in batteries
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy helps move energy from
one place to another
Most power stations
use fossil fuels to
make electricity
which is transmitted
through cables
which we can then
use in our homes
stored chemical energy electrical energy
light energy (or sound
movement or heat
energy)
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
There are chemicals inside each of the batteries
chemical energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
When the torch is switched on energy from the batteries is carried
round an electrical circuit and lights up the bulb
chemical energy electrical energy light energy
08012016 copy cgrahamphysicscom 2016
Wasted energy Whenever energy is changed from one form to another some energy is
always wasted
Energy is usually wasted as
All electrical devices produce a small amount of heat energy which is
normally wasted
heat energy
sound energy
08012016 copy cgrahamphysicscom 2016
Wasted sound energy If you can hear a device that is not designed to make noise then energy is wasted
as sound
Examples of devices that waste energy as sound include
washing
machine
car engine
hairdryer
jet engine
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy can change to
light energy sound energy
heat energy kinetic (movement) energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy comes from
chemical energy in the
fossil fuels used in
power stations
kinetic energy in
dynamos
light energy in
solar cells
chemical energy stored
in batteries
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy helps move energy from
one place to another
Most power stations
use fossil fuels to
make electricity
which is transmitted
through cables
which we can then
use in our homes
stored chemical energy electrical energy
light energy (or sound
movement or heat
energy)
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
There are chemicals inside each of the batteries
chemical energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
When the torch is switched on energy from the batteries is carried
round an electrical circuit and lights up the bulb
chemical energy electrical energy light energy
08012016 copy cgrahamphysicscom 2016
Wasted energy Whenever energy is changed from one form to another some energy is
always wasted
Energy is usually wasted as
All electrical devices produce a small amount of heat energy which is
normally wasted
heat energy
sound energy
08012016 copy cgrahamphysicscom 2016
Wasted sound energy If you can hear a device that is not designed to make noise then energy is wasted
as sound
Examples of devices that waste energy as sound include
washing
machine
car engine
hairdryer
jet engine
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy comes from
chemical energy in the
fossil fuels used in
power stations
kinetic energy in
dynamos
light energy in
solar cells
chemical energy stored
in batteries
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy helps move energy from
one place to another
Most power stations
use fossil fuels to
make electricity
which is transmitted
through cables
which we can then
use in our homes
stored chemical energy electrical energy
light energy (or sound
movement or heat
energy)
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
There are chemicals inside each of the batteries
chemical energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
When the torch is switched on energy from the batteries is carried
round an electrical circuit and lights up the bulb
chemical energy electrical energy light energy
08012016 copy cgrahamphysicscom 2016
Wasted energy Whenever energy is changed from one form to another some energy is
always wasted
Energy is usually wasted as
All electrical devices produce a small amount of heat energy which is
normally wasted
heat energy
sound energy
08012016 copy cgrahamphysicscom 2016
Wasted sound energy If you can hear a device that is not designed to make noise then energy is wasted
as sound
Examples of devices that waste energy as sound include
washing
machine
car engine
hairdryer
jet engine
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Electrical energy helps move energy from
one place to another
Most power stations
use fossil fuels to
make electricity
which is transmitted
through cables
which we can then
use in our homes
stored chemical energy electrical energy
light energy (or sound
movement or heat
energy)
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
There are chemicals inside each of the batteries
chemical energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
When the torch is switched on energy from the batteries is carried
round an electrical circuit and lights up the bulb
chemical energy electrical energy light energy
08012016 copy cgrahamphysicscom 2016
Wasted energy Whenever energy is changed from one form to another some energy is
always wasted
Energy is usually wasted as
All electrical devices produce a small amount of heat energy which is
normally wasted
heat energy
sound energy
08012016 copy cgrahamphysicscom 2016
Wasted sound energy If you can hear a device that is not designed to make noise then energy is wasted
as sound
Examples of devices that waste energy as sound include
washing
machine
car engine
hairdryer
jet engine
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
There are chemicals inside each of the batteries
chemical energy
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
When the torch is switched on energy from the batteries is carried
round an electrical circuit and lights up the bulb
chemical energy electrical energy light energy
08012016 copy cgrahamphysicscom 2016
Wasted energy Whenever energy is changed from one form to another some energy is
always wasted
Energy is usually wasted as
All electrical devices produce a small amount of heat energy which is
normally wasted
heat energy
sound energy
08012016 copy cgrahamphysicscom 2016
Wasted sound energy If you can hear a device that is not designed to make noise then energy is wasted
as sound
Examples of devices that waste energy as sound include
washing
machine
car engine
hairdryer
jet engine
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
101b Electrical energy
Example a torch
When the torch is switched on energy from the batteries is carried
round an electrical circuit and lights up the bulb
chemical energy electrical energy light energy
08012016 copy cgrahamphysicscom 2016
Wasted energy Whenever energy is changed from one form to another some energy is
always wasted
Energy is usually wasted as
All electrical devices produce a small amount of heat energy which is
normally wasted
heat energy
sound energy
08012016 copy cgrahamphysicscom 2016
Wasted sound energy If you can hear a device that is not designed to make noise then energy is wasted
as sound
Examples of devices that waste energy as sound include
washing
machine
car engine
hairdryer
jet engine
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
Wasted energy Whenever energy is changed from one form to another some energy is
always wasted
Energy is usually wasted as
All electrical devices produce a small amount of heat energy which is
normally wasted
heat energy
sound energy
08012016 copy cgrahamphysicscom 2016
Wasted sound energy If you can hear a device that is not designed to make noise then energy is wasted
as sound
Examples of devices that waste energy as sound include
washing
machine
car engine
hairdryer
jet engine
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
Wasted sound energy If you can hear a device that is not designed to make noise then energy is wasted
as sound
Examples of devices that waste energy as sound include
washing
machine
car engine
hairdryer
jet engine
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
Wasted heat energy If a device gets warm and it is not designed to get warm then energy is wasted
as heat
Examples of devices that waste energy as heat include
radio
mobile phone
charger
television
car engine
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
Which type of energy is wasted
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
What happens to wasted energy
Wasted energy spreads out into the surroundings ndash this is called dissipated
energy
This dissipated energy is too spread out to do useful work and so cannot be
re-used
(Remember that energy cannot be created or destroyed)
What happens to the wasted energy produced whenever energy is
changed from one form to another
This is why it is important to reduce the amount of energy that is wasted
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
Can you name the energy transfer
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
heat
sound
light
electrical
Can you draw the energy flow diagram
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
heat
sound electrical
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
heat
sound
kinetic
chemical
What are the main energy transfers in a car engine
(Donrsquot forget the wasted energy)
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016
Energy Circus
Around the lab are a selection of devices
For each one identify
bull All the energy transfers (every stage)
bull Underline useful transfers
bull Bracket wasted transfers
bull Write the name and transfers into your books
Plenary
bull Example (try in your books in pencil)
Energy - 07 - Movie Girl in Human Slingshotavi
08012016 copy cgrahamphysicscom 2016