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The Energy Story
Energy
Is Born
Energy
Types
Energy
Changes
Energy
Generation
The Energy Problem
The Energy Solution |
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Energy
Changes
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As we
have said, energy is constantly changing from one type into
another. This is happening all around us and throughout the
universe.
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Examples
of Changes
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of the most obvious examples of energy changing from one type
into another occurs our homes. A number of examples are illustrated
below. In each example energy starts as one type (energy in)
and changes into another type (energy out). In some cases the
energy might actually change into more than one type before
the final energy out. In those situations, ignore the energy
changes in the middle. Try to identify when this is happening
and check your guesses with the information given after the
examples. |
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Example
Description
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Energy
In
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Energy
Out
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Electric
Wok
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Electrical
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Heat
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Flashlight
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Chemical
(in the batteries)
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Light
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Guitar
String
( being plucked)
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Mechanical
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KE
(sound)
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Blinds
(being opened)
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Mechanical
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Gravitational
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Burning
Candle
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Chemical
(wax)
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Light
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Sand
Clock
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Gravitational
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Kinetic
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Arrow
Shot From Crossbow
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Spring
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Kinetic
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Hand
Scanner
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Light
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Electrical
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A Toboggan
Going Downhill
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Gravitational
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Kinetic
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Gasoline
Powered Lawnmower
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Chemical
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Mechanical
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Microwave
Oven
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Light
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Heat
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Notes: The
one example where there was an obvious energy change in the "middle"
was the flashlight. Chemical energy from the chemicals inside the
batteries first changed into electrical energy before finally being
changed into light energy.
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